1810-50-A3 - Bourns - Pdf.Support

Bourns®

Circuit Protection Selection Guide

Circuit Protection Solutions

The Bourns Mission

Our goal is to satisfy customers on a global basis

while achieving sound growth with technological

products of innovative design, superior quality

and exceptional value. We commit ourselves to

excellence, to the continuous improvement

of our people, technologies, systems, products

and services, to industry leadership and to

the highest level of integrity.

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Why Protection is Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Bourns® Circuit Protection Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Select the Appropriate Device for your Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Network Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Generic Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Central Office (CO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Customer Premises (CPE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

DSL and Voice Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

ADSL Splitter with Primary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

T1/E1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

New Technology Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

USB OTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Power over Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Product Selection Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Telecom Line Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Customer Premises Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Overvoltage Protection Components

GDT – Gas Discharge Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

TSP – Thyristor Surge Protectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

TVS Diodes – Transient Voltage Suppressor Diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Overcurrent Protection Components

Multifuse® – Polymer PTCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

LPMs - Line Protection Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Telefuse™ – Telecom Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

ESD Protection Components

ESD Protection Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

ChipGuard® – Multilayer Varistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Diode Arrays for ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Outside Plant

Outside Plant Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Signaling Protectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Other Related Products and Capabilities

Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Module Solution Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

DC-DC Converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Which Protection Technology is Right for the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Telecommunications Standards and Recommendation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Table of Contents

Bourns is pleased to present this comprehensive

guide to Telecom Circuit Protection, encompassing

our broad range of technologies and products. This

guide will provide the background information and

selection recommendations needed to ensure that

your next project achieves the level of cost-effective

field reliability demanded by today’s customers.

Bourns commissioned a survey of telecom circuit

protection users worldwide to determine their

priorities and needs. We found that reliability,

technical and design support and exemplary

knowledge of protection technology were by far the

three most cited items. Bourns is committed to

meeting each of the three following requirements.

Reliability – Reliability requires an understanding of

the capabilities and specifications of circuit

protection technology. Bourns has a global

reputation for quality products and our circuit

protection devices have consistently demonstrated

reliability in field applications. Bourns is committed

to the complete support of a circuit protection

solution for the life of a program.

Technical and Design Support – Bourns has a global

team of specialized sales and Field Applications

Engineers (FAEs) ready to bring in-depth circuit

protection expertise to your next project. Wherever

you are located in the world you have a regional

applications team available to help you from Asia

and Europe to the Americas. For your next

application why not contact your local sales office

which will put you in contact with your nearest FAE

to help you to make the right choice of circuit

protection solutions for your application.

Introduction

Knowledge of Protection Technology – Bourns

boasts the industry’s widest range of telecom

overvoltage and overcurrent protectors. Our active

involvement in international protection standards

organizations ensures world-class technology and

applications expertise. Bourns continues to develop

an innovative range of integrated circuit protection

products using our knowledge and expertise to

combine multiple technologies into optimized single

devices designed to save both cost and board space.

Whether you need a single product or a complete

protection solution, Bourns telecom circuit

protection team is there to help you. We look

forward to working with you.

The Bourns Website – Bourns website,

www.bourns.com, is an invaluable resource to

further help you determine your circuit protection

solution. The following information is available:

•Comprehensive data sheets

•A product selection tool

•Reference Design Notes

(http://www.bourns.com/archive.aspx)

•Tutorials in the area of circuit protection

(http://www.bourns.com/archive.aspx)

•More detailed information on regulatory

requirements

Communication systems are vulnerable to damage

from lightning or other electrical surges. As systems

become more complex, they also become more

vulnerable. Balancing the cost, standards compliance

and field reliability of protection of such systems is

both a commercial and technical challenge,

compounded by the additional performance

constraints of modern digital networks such as xDSL.

A “surge” is a temporary increase in voltage, current

or both. Lightning and the AC power distribution

system cause surges, but of very different magnitudes

and durations (see Table 1). These events can either

be via direct contact or by field or resistive coupling

from events close to the telephone system, resulting

in a wide variety of threats. For example, the effects

of a power line fault caused by lightning may even be

more threatening to the telephone system than the

original lightning. The dangers of large voltages and

currents are obvious, but time is also important.

Lightning is too fast for bulk heating to be critical,

whereas for the longer term currents of AC power

faults, bulk heating can significantly effect device

survival and safety. Direct contact to the AC (power

cross) causes high currents, while lower currents

result from power induction. Obviously, a single

device protection solution is seldom possible.

Why Protection Is Needed

Lightning kA, kV µs Negligible

Power Cross 60 A <30 mins Signiﬁcant

Power

Induction 7 A <30 mins Crucial

Bulk

Amplitude Duration Heating

Table 1. Different surge sources result in very different

effects

Figure 1. Protecting “ Quality of Service” requires

more than standards compliance

Protection performs several key functions as

outlined in Figure 1. First it must prevent or

minimize damage caused by a surge; then it must

ensure that the system returns to a working

condition with minimal disruption to service. It is

vital that under normal conditions the protection

does not interfere with the signal, creating special

challenges for xDSL and other digital technologies.

The protection must also fail in a safe manner during

overstress.

Development of Standards – Due to the enormous

cost of interrupted service and failed network

equipment, telephony service providers around the

world have adopted various specifications to help

regulate the reliability and performance of the

telecommunications products that they purchase. In

Europe and much of the Far East, the most common

standards are ITU-T K.20, K.21 and K.45. In North

America, most operating companies base their

requirements on GR-1089-CORE, TIA-968-A

(formerly known as FCC Part 68), and UL 60950.

The Telecommunication Standards and

Recommendations Summary discusses these various

standards in more depth. Figure 2 on the next page

summarizes the applicable standards.

Quality

of service

Field reliability

Standards

compliance

Signal

integrity

NID

NID NID

Splitter

Intra-Building Wiring

Customer Premise

(Subscriber)

Customer Premise

(Subscriber)

Access Central Office

(Telecom Center)

Outside

Plant

Fiber

Twisted-

Pair

POTS

MDF

Circuit Protection Customer

Premise Access Central

Ofﬁce

Region

Powered

IT Safety

UL 60950-1 UL 60950-21

(2003) (2003)

Primary

Protection

GR-974-CORE

2002)

GR-1361-CORE

(1998)

Equipment

Secondary

Protection

TIA-968-A + A1 + A2

(2002-2003-2004 – Part 68)

GR-1089-CORE

(2002)

GR-1089-CORE

(2002)

GR-1089-CORE

(2002)

Int’l

Powered

IT Safety

IEC 60950-1 IEC 60950-21 ITU-T K.50 ITU-T K.51

(2001) (2002) (2000) (2000)

Primary

Protection

ITU-T K.12

(2000)

ITU-T K.28

(1993)

Equipment

Secondary

Protection

ITU-T K.21/44

(2003)

ITU-T K.45/44

(2003)

ITU-T K.20/44

(2003)

Figure 2

Bourns®Circuit Protection Products

Overvoltage Products

Bourns family of Gas Discharge Tubes (GDTs) creates a

quasi short circuit across the line when the gas is

ionized quasi by an overvoltage, returning to their

high impedance state after the surge has terminated.

These robust devices have the highest impulse

current capability of any technology combined with

negligible capacitance, making them very attractive

for the protection of high speed digital lines as well

as standard POTS lines.

Bourns family of TISP® Thyristor-based devices initially

clamp the line voltage, and then switch to a low-

voltage “On” state. After the surge, when the current

drops below the “holding current,” the protector

returns to its original high impedance state.

Bourns offers a family of Transient Voltage Suppressor

(TVS) Diodes which operate by rapidly moving from

high impedance to a non-linear resistance

characteristic that clamps surge voltages. TVS diodes

provide a fast-acting and well-controlled clamping

voltage, however they exhibit high capacitance and

low energy capability thereby restricting the

maximum surge current.

Overcurrent Products

Bourns family of Multifuse® Polymer Positive Temperature

Coefﬁcient (PPTC) Thermistor “resettable fuses” is used in

a wide variety of circuit protection applications.

Under high current fault conditions the device

resistance will increase by many orders of magnitude

and remain in a “tripped” state, providing

continuous circuit protection until the fault is

removed. Once the fault is removed and the power

cycled, the device will return to its normal low

resistance state.

Bourns family of Telefuse™ Telecom Fuses is

constructed from a metal element encapsulated

in a ceramic housing. The fuse element heats up at

the rate of I2R. Once the temperature of the element

exceeds the melting point, it vaporizes and opens the

circuit. The low resistance of fuses is attractive

for xDSL applications.

MSP® and TRIGARD® Gas Discharge Tubes

TISP® – Telecom Overvoltage Protectors

TVS Diodes for low energy surge and ESD protection

Multifuse® Resettable Fuses

Telefuse™ Telecom Fuses

Bourns family of Line Protection Modules (LPMs) is based

on the most fundamental form of current protection

, the Line Feed Resistor (LFR), normally fabricated as a

thick-film resistor on a ceramic substrate. LPMs have

the ability to withstand high voltage impulses

without breaking down, AC current interruption

occurs when the high temperature developed by the

resistor causes mechanical expansion stresses that

result in the ceramic breaking open. Low current

power induction may not break the LFR open,

creating long-term surface temperatures of more

than 300 °C. To avoid heat damage to the PCB and

adjacent components, maximum surface temperature

can be limited to about 250 °C by incorporating a

series thermal fuse link on the LFR.

This capability is extended to the design and

manufacture of a full range of modules,

incorporating both overcurrent and overvoltage

devices on one ceramic substrate. Further

incorporation of silicon die and discrete components

is also possible to achieve small modules with high

performance and full functionality.

ESD PROTECTION PRODUCTS

Bourns family of ChipGuard® ESD clamp protectors

consists of multilayer varistors (MLV) designed to

protect equipment against electrostatic discharge

(ESD) conditions. The Bourns® ChipGuard® series

has low leakage currents that make the devices

transparent under normal operation. ESD transients

cause the device to clamp the voltage by reducing its

effective resistance and the device will reset to a high

impedance state after the disturbance has passed.

The Bourns® ChipGuard® product family is designed

to protect equipment such as communication ports

to IEC61000-4-2, level 4.

Bourns offers a family of Diode Arrays for ESD

protection. Using Thin Film on Silicon wafer

fabrication technology combined with Chip Scale

Packaging, such devices are commonly used in

portable electronics applications where the customer

has specified a particular electrical response

characteristic for a minimum real estate allowance.

Handheld wireless devices, in particular, cell phones

and PDAs often have data and/or audio ports that

Line Protection Modules

ChipGuard® Multilayer Varistors for ESD protection

Diode Arrays for ESD protection (CSP options)

connect the device to other external devices such as

laptop computers and headsets. Bourns offers the

capability to integrate resistors, capacitors, inductors,

diodes and transistors into a single monolithic device

with minimal packaging overhead.

Outside Plant

Bourns Outside Plant product line offers a full line of

protection products based on our own Gas Discharge

Tube (GDT) and patented Multi-Stage Protection

(MSP®) technology. Products include

5-Pin protectors for the central office, building

entrances and a wide range of station protectors for

the customer premises. We also offer a complete line

of fully modular Network Interface Devices (NIDs)

available from one to one hundred lines. Our NIDs

are flexible with a wide variety of customizations

available. Additionally, we round out our offering

with a full line of ADSL and VDSL splitters available

in both binding post and snap-in packages. All of

our products are UL listed and manufactured to RUS

and Telcordia technical requirements.

Bourns® Data and Signal Systems Surge Protectors offer

surge protection to field mounted 4-20 mA

transmitters. They feature a 1669 series protector

with a sealed stainless steel pipe for easy connection

to a field transmitter 1/2 inch NPT port and typically

a rail-mounted 1820 series protector to protect the

DCS equipment at the opposite end of the loop.

Other Products

Bourns offers a family of Transformers suitable for use

in Telecom, LAN, Ethernet and xDSL applications.

They exhibit high isolation and are ideal for signal

conditioning, impedance matching and noise

filtering applications. Devices are available for all

leading chipsets.

A comparison of technologies used in telecom

applications is described in the section entitled, “Which

Protection Technology is Right for the Equipment,”

including technologies not offered by Bourns, describing

the general advantages and disadvantages of each and

also giving suggestions for appropriate applications.

Outside Plant – NID Boxes and Data Line Protectors

Station Protectors – Central ofﬁce / customer

premises protectors

Custom Telecom Transformers

The following Network Diagram gives an overview of where the

various technologies are used in today’s communication

electronics industry.

Selecting the Appropriate Device for your Application

Circuit Protection Solutions

TEST

RELAY

RING

RELAY

SLIC

RELAY

TEST

EQUIP-

MENT RING

GENERATOR

S1a

S1b

Th1

Th2

Th3

Th4

Th5

SLIC

PROTECTOR

RING/TEST

PROTECTION

S2a

S2b

TISP

3xxxF3

7xxxF3

S3a

S3b

VBATH

TISP

61089B

220 nF

RING

TIP

4B06B-524-400

4B06B-522-500

MF-RX012/250

2026-xx

2036-xx

Multifuse®

Resettable Fuse

LPM

GDT

TISP® -

Thyristor Surge

Protection

TISP® -

Thyristor Surge

Protection

Line Card Protection with Electromechanical Relays

Central Ofﬁce (CO)

100 nF

SLIC 2

TISP6NTP2A

100 nF

SLIC 1

SLIC

PROTECTOR

0 V

VBAT2

VBAT1

4A12P-516-500

MF-RX012/250

Multifuse®

Resettable Fuse

LPM

TISP® -

Thyristor Surge

Protection

Integrated Line Protection for Multiple SLICs

Several generic examples of the use of protection

components are given over the following pages for

your reference. Our field application engineers are

available to discuss your actual circuit configuration

and requirements.

RING

RELAY

SLIC

RELAY

RING

GENERATOR

SW5b

SW5a

R1R2

VBAT

VRING

Th1

Th2

Th3

Th4

SLIC

Vbat

RING

TIP

SW3

SW4

SW1

SW2

CONTROL

LOGIC

LCAS

4B06B-540-125/219

MF-RX012/250

2026-xx

2036-xx

GDT

Multifuse®

Resettable Fuse

LPM

Line Card Protection with Solid-State Line Card Access Switch

Central Ofﬁce (CO) – continued

Basic ADSL Interface

C Signal

TISP4360MM

TISP4360H3

RING

TIP

+t˚

B1250T †

MF-RX018/250‡

†TIA/EIA-IS-968 / UL 60950

‡ITU-T K.21 (Basic)

2027-xx

2035/37-xx

Multifuse®

Telefuse™

TISP® GDT

Customer Premises (CPE)

Basic Electronic Hook Switch Protection

Ring

Detector

Polarity

Bridge

Power

Isolation B arrier

Tx Sig nal

Hook

Switch

Solid

State

Relay

OC1

OC2

Rx S ignal

D1 D2

D3 D4

TISP4350H3 †

TISP4290L3 ‡

RING

TIP

B1250T †

MF-RX018/250‡

+t˚

†TIA/EIA-IS-968 / UL 60950

‡ITU-T K.21 (Basic)

Multifuse®

Telefuse™

TISP®

Basic Electromechanical Hook Switch Protection

Ring

Detector

Hook

Switc h

Polarity

Bridge

Relay

Sink Sig nal

OC1

D1 D2

D3 D4

Isolation B arrier

TISP4350H3 †

RING

TIP

B1250T †

TISP4290L3 ‡

MF-RX018/250‡

2027-xx

2035/37-xx

+t˚

†TIA/EIA-IS-968 / UL 60950

‡ITU-T K.21 (Basic)

Multifuse®

TISP® GDT

Telefuse™

DSL and Voice Protection

Ringing SLIC Dual Voltage

Ringing SLIC SLIC

LCAS

(Line Card Access Switch) DSL

(Data Subscriber Line)

SPLITTER

DSL

30 20

50 30

TISP61089B

TISP®

Telefuse™

Fuses

TIP

B1250T

Telecom

Fuse

B1250T

Telecom

Fuse

B1250T

Telecom

Fuse

B1250T

Telecom

Fuse

B1250T

Telecom

Fuse

B1250T

Telecom

Fuse

RING

TISP4290H3BJR

TISP4290H3BJ

TISP8201MD

TISP8200MD

TIP

RING

thy1

thy2

TIP

RING

Telefuse™

Fuses

Telefuse™

Fuses

ADSL Splitter with Primary

TIP

RING

TISP4360H3

TISP®

ADSL

Analog

T1/E1 Application

Base

Station

Receiver

B1250

B1250T

TISP4015H1BJ

Telefuse™

TISP®

VCC

TX1

TX2

RX1

RX2

T1 = 2.4

E1 = 1

5.6

TISP4015H1BJR

TISP®

TISP4015H1BJR

TX1

TX2

RX1

RX2

1515

ESD Protection

Communication Port Protection

USB

Port

Firewire Port

Controller

MF-SM150/33

Power

MF-MSMF110

Data

Power

Data-a

GND

Data-a

Data-b

Data

GND

USB

Controller

Multifuse®

CG0603MLC-05E

ChipGuard®

CG0603MLA-18KE

ChipGuard®

10/100 Base Ethernet Protection

LAN Driver

RJ45 socket

LAN Receiver

CG0603MLC-

CG0603MLC-05E

ChipGuard®

New Technology Applications

USB On The Go (OTG)

After the success of the USB 2.0 standard, the USB

Implementers Forum, Inc. developed an expansion

standard called USB OTG (On The Go). USB OTG

was developed based on the concept of allowing

peripheral devices to communicate directly with

each other without going through a PC host. USB 2.0

traditionally consisted of a host/periphery topology

where a PC was the host and the peripheral could

communicate only through the host device.

However, USB OTG was introduced to supplement

USB 2.0 to allow existing mobile devices to

communicate in a point-to-point manner without

the traditional host (PC).

Under USB OTG any peripheral device that is

designed to act as a limited host (A-Device) must be

able to transmit and receive power. In such

equipment, if the current rating per port of the

A-device is greater than 100 mA, then the voltage

regulation is required to be between 4.75 V and

5.25 V, and the A-device is required to meet the

USB 2.0 specification requirements for power

providers. USB 2.0 makes overcurrent protection a

requirement and a polymer PTC resettable fuse, such

as a Bourns® Multifuse® polymer PTC resettable fuse,

is a solution for providing such overcurrent

protection. The Bourns® Multifuse® MF-MSMF

Series and MF-NSMF Series have been introduced

specifically for overcurrent protection of USB OTG

ports.

Power over Ethernet (PoE)

The IEEE 803.3af Ethernet specification standard

defines the voltage and current requirements of

powered Ethernet equipment delivering up to 48

volts of DC power to PoE-compliant devices over

eight-wire Category 5 and 6 cabling. There are two

types of architecture. One is called mid-span, which

involves running power over unused wire pairs in a

LAN cable. Mid-span products are built into patch

panel-like devices that can add PoE to existing LAN

infrastructures. The other, an increasingly popular

version of 802.3af is called end-span. End-span runs

DC power signals over the same wire pairs used for

data transmission. Industry experts say end-span

devices are becoming popular because they are

usually built into new switches with PoE, which

users often buy for IP telephony or WLAN rollouts.

Typically, designers chose to back up the power

management circuit with a solid state polymer PTC

resettable fuse. The resettable fuse deactivates any

port not protected by the power management circuit

due to a temporary or permanent fault and thereby

prevents further system failures.

The Bourns® device is a compact, symmetrical 2018

footprint design with a very low profile. The design

facilitates incorporation onto the already densely

populated boards of today's network equipment.

1717

Product Selection Tables

It is important to read the Technology Comparison

section of this guide prior to deciding what device is

right for the application. We strongly advise that you

contact your local Bourns Field Applications Engineer

to discuss your exact application and choice of

device(s). The advantages and disadvantages of each

technology is discussed which will further help in the

correct choice of components and/or modules.

Telecom Line Protection

Central Ofﬁce & Access Equipment

U.S.A. International

Central Ofﬁce / Access

GR-1089-CORE

Central Ofﬁce

ITU-T K.20 & K.44

Access

ITU-T K.44 & K.45

Application/

Function

Protected

Element

Overvoltage

Protection

Overcurrent

Protection

Overvoltage

Protection

Overcurrent

Protection

Overvoltage

Protection

Overcurrent

Protection

xDSL

Line Card

DSLAM

Capacitor

2X TISP4xxxH3BJ

+ TISP4xxxJ1BJ

2X TISP4xxxH3BJ

2035-35-SM

B1250T

2X TISP4xxxL/M3

+ TISP4xxxH3

2X TISP4xxxL/M3

MF-RX018/250

B1250T

2X TISP4xxxL/M3

+ TISP4xxxH3

2X TISP4xxxL/M3

MF-RX018/250

B1250T

Analog

Line Card

Mechanical

Relay

TISP3xxxH3SL

TISP7xxxH3SL

2X TISP4xxxH3BJ

+ TISP4xxxJ3BJ

2X TISP4xxxH3BJ

2035-35-SM

B1250T

4B06B-524-500

4A12P-516-500

MF-R016/600

TISP3xxxF3

TISP7xxxF3

MF-R012/250

MF-SM013/250

TISP3xxxF3

TISP7xxxF3

MF-R012/250

MF-SM013/250

Analog

Line Card

WLL

SLIC

TISP1xxxF3D

TISP5xxxH3BJ

TISP61089AD

TISP61089BD

TISP820xMD

TISP83121DR

4B04B-524-500

B1250T

4B04B-524-500

MF-R016/600

4A12P-516-500

4B07-530-400

TISP1xxxF3

TISP61089

TISP820x

TISP83121

TISP6NTP2x

MF-R012/250

MF-SM013/250

4B07B-530-400

4B04B-524-500

4B06B-514-500

TISP1xxxF3

TISP61089

TISP820x

TISP83121

TISP6NTP2x

MF-R012/250

MF-SM013/250

4B07B-530-400

4B04B-524-500

4B06B-514-500

xDSL

Line Card Transformer/C

TISP4xxxH3BJ

2035-35-SM

2036-40-SM

B1250T

MF-R016/600

TISP4xxxL3AJ

TISP4xxxM3BJ

TISP4xxxM3AJ

2036-40-SM

MF-R018/250

TISP4xxxL3AJ

TISP4xxxM3BJ

TISP4xxxM3AJ

2036-40-SM

MF-R018/250

Analog

Line Card

Solid State

Relay (LCAS)

TISP4A270BJ

+ TISP4125H3BJ

TISP4219H3BJ

+ TISP4125H3BJ

TISP4A265H3BJ

+ TISP4125H3BJ

B1250T

4B06B-540-

125/219

MFR016/600

B1250T

TISPL758F3

MF-R012/250

MF-SM013/250

Various LPMs

TISPL758F3

MF-R012/250

MF-SM013/250

Various LPMs

Note: Central Ofﬁce Primary Protection comes in various forms of 5-Pin protection modules,

complying with UL 497, GR 974, GR 1361 and RUS-PE 80.

Customer Premises Equipment

U.S.A.

TIA-968-A

UL 60950

International

ITU-T K.21 & K.44

IEC 60950

Application/

Function

Protected

Element

Overvoltage

Protection

Overcurrent

Protection

Overvoltage

Protection

Overcurrent

Protection

DECT / 900 MHz /

2.4 GHz Phone

Hook Switch /

Electronic Relay

Rechargeable Battery

TISP4350H3LM

TISP4350H3BJ

CD214B-TxxxC

MF-R016/600

B1250T

MF-VS210*

TISP4290F3LMx

MF-SM013/250

4B04B-503-500

4B06B-514-500

MF-VS210*

Phone Hook Switch/

Electronic Relay

TISP4350T3BJ

CD214B-Txxx

2035-35-SM

B1250T

MF-R015/600

Feature Phone Hook Switch/

Electronic Relay

TISP4350MMBJ

TISP4350MMAJ

CD214B-Txxx

2035-35-SM

MF-R015/600-A

MF-R015/600

LAN Phone Insulation

TISP4600/4700

CD214Cxxx

2035-60-SM

B1250T TISP4600/4700 MF-SM013/250

Surge Bar Phone Port Insulation 2035-60-SM MF-R012/250

FAX Hook Switch/

Mechanical Relay

2035-35-SM

CD214B-Txxx MF-R015/600

Analog Modem Hook Switch/

Mechanical Relay

TISP4350T3BJ

2035-35-SM

CD214B-TxxxC

MF-R016/600

MF-R015/600-A

B1250T

TISP4290L3AJ MF-R012/250

Digital Modem Transformer/C 2035-35-SM MF-R015/600 2035-40 MF-R015/600

Set Top Box

Modem

Hook Switch/

Electronic Relay

USB Port*

TISP4350T3BJ

2035-35-SM

CD214B-Txxx

B1250T

MF-R015/600

MF-MSMF110

2035-35-SM MF-MSMF110

Set Top Box

DSL Modem Transformer/C

TISP4395H3

CD214C-TxxxC

2035-35-SM

B1250T

MF-R015/600

TISP4395L3

2035-40 MF-RX018/250

Set Top Box

DSL Modem

SLIC

DSL Transformer

TISP5xxxH3BJ

CD214C-Txxx

2035-35-SM

B1250T

MF-R015/600 TISP1072F3 LPM

Set Top Box SLIC TISP6NTP2xD

CD214C-Txxx MF-R015/600 TISP6NTP2x

4B06B-514-500

MF-R012/250

MF-SM013/250

Cable Telephony

Data Port

Transformer

Power Passing Tap*

TISP4350T3BJ

CD214C-Txxx

MF-R015/600

MF-R055/90* TISP4290L3AJ MF-RX018/250

MF-R055/90*

*Different Regulatory Standards apply

Customer Premises Equipment – continued

U.S.A.

TIA-968-A

UL 60950

International

ITU-T K.21 & K.44

IEC 60950

Application/

Function

Protected

Element

Overvoltage

Protection

Overcurrent

Protection

Overvoltage

Protection

Overcurrent

Protection

POS Equipment

Hook Switch /

Mechanical Relay

Electric Motor*

2035-35-SM

TISP4350H3BJ

MF-R015/600

B1250T

MF-SM100*

2027-xx MF-SM100*

Routers –

LAN Linked Insulation 2035-60-SM

CD214B-Txxx

Surge Bar

Phone Port Insulation 2035-60-SM

CD214C-TxxxC

UPS MF-R015/600 MF-R014/250

PABX SLIC TISP61089BD

CD214A-Txxx

B1250T

MF-R015/600 TISP61089 4B06B-514-500

WLL SLIC TISP1072F3DR MF-R016/600 TISP820x MF-R015/600

Pairgain SLIC TISP820xMD MF-R015/600

Home LAN

Transformer/C

Power over

Ethernet port*

TISP4350H3LM

CD214A-TxxxC

B1250T

MF-SMDF050* TISP4290F3LMx MF-SMDF050*

*Different Regulatory Standards apply

Note: Primary Protection of Customer Premises Equipment is provided by our line of 5-Pin Building Entrance Modules and our conventional

Station Protectors, Bourns® MSP®, IPA and Coax C-TV Protectors, complying to UL 497, 497C, GR 974, GR 1361 and RUS-PE 80. Various

Network Interface Devices (NIDs) are available for these Customer Premises protectors.

ESD Protection Selection

Yes

No No

NoNo

START

ESD

Protection Request?

(IEC61000-4-2)

Array

Required?

Is Surge

Required?

(8/20 µs)

Low Capacitance

Requirement?

Low Capacitance

Requirement?

TSP

(Thyristor Surge

Protector)

See

Diode Arrays

(page 64)

Tolerance Capacitance

Requirement?

MLE Series

• 8/20 µs + ESD

specified

• 18 V max. DC

operation

• Leakage current

characterized

MLD Series

• 12 V DC voltages

• ESD data sheet

characterized

• 5 pF max.

MLC Series

• 5 V plus DC voltages

• ESD data sheet

characterized

• 0.5 pF max.

12 V option

• Ultra-low leakage

current

MLA Series

• 5.5 V plus DC voltages

• 8/20 µs specified

• 140 pF typical for 18

Other Devices

For Outside Plant Protectors, Signaling System Surge

Protectors, Line Protection Modules, TVS Diodes

and Telecom Transformers, please refer to the

Product Selection Guides in the next section and/or

contact your local representative for more

information.

GDT – Gas Discharge Tubes

Selection Guide

Bourns® Gas Discharge Tubes (GDTs) prevent

damage from overvoltages by acting as a “crowbar”,

i.e. a short circuit. When a voltage surge exceeds the

GDT’s defined sparkover voltage level (surge

breakdown voltage), the GDT becomes ionized and

conduction takes place within a fraction of a

microsecond. When the surge passes and the system

voltage returns to normal levels, the GDT returns to

its high-impedance (off) state.

Features

• Unmatched performance and reliability

• Various lead configurations

• Smallest size in the industry

(Mini 2-Pole and MINI TRIGARD™)

• Very high surge handling capability

• Extremely low work function for long service life

• Low capacitance & insertion loss

• Highly symmetrical cross-ionization

• Non-radioactive materials

• Optional Switch-Grade Fail-Short Device

• “Crowbar” function to less than 10 V arc voltage

• Telcordia, RUS, ITU-T, IEC, IEEE and UL

compliant

• Broadband network capable

• Through-hole, SMT and cassette mounting

configurations available

• Surge Protector Test Set (Model 4010-01) available

for GDTs and other technologies

3-Terminal GDTs (Switch-Grade Fail-Short Device option available)

Model

Sparkover

Voltage

Max. Single

Surge Rating

(8/20 µs)

Surge Rating

(8/20 µs) AC Rating Capacitance

Min. Surge

Life Rating

(10/1000 µs

waveshape)

2026-07

2026-09

2026-15

2026-20

2026-23

2026-25

2026-30

2026-35

2026-40

2026-42

2026-47

2026-60

75 V

90 V

150 V

200 V

230 V

250 V

300 V

350 V

400 V

420 V

470 V

600 V

40 kA 10 x 20 kA 10 x 20 A rms, 1 s <2 pF 400 x 1000 A

2036-07

2036-09

2036-15

2036-20

2036-23

2036-25

2036-30

2036-35

2036-40

2036-42

2036-47

2036-60

75 V

90 V

150 V

200 V

230 V

250 V

300 V

350 V

400 V

420 V

470 V

600 V

20 kA 10 x 10 kA 10 x 10 A rms, 1 s <2 pF

300 x 200 A

or 500 x 200 A

10/700 µs

The rated discharge current for 3-Electrode GDTs is the total current equally divided between each line to ground.

3-Terminal GDTs (Switch-Grade Fail-Short Device option available) – continued

Model

Sparkover

Voltage

Max. Single

Surge Rating

(8/20 µs)

Surge Rating

(8/20 µs) AC Rating Capacitance

Min. Surge

Life Rating

(10/1000 µs

waveshape)

2026-23-xx-MSP 230 V

40 kA 10 x 20 kA 20 x 10 A rms, 1 s <20 pF 1000 x 1000 A

2026-33-xx-MSP 330 V

t°

MSP® = Multi-Stage Protection. MSP® devices have has a patented Switch-Grade Fail-Short Device as standard conﬁguration and contains 2 minia-

ture MOVs in parallel with each line.

The rated discharge current for 3-Electrode GDTs is the total current equally divided between each line to ground.

2-Terminal GDTs

Model

Sparkover

Voltage

Max. Single

Surge Rating

(8/20 µs)

Surge Rating

(8/20 µs) AC Rating Capacitance

Min. Surge

Life Rating

(10/1000 µs

waveshape)

2027-09

2027-15

2027-20

2027-23

2027-25

2027-30

2027-35

2027-40

2027-42

2027-47

2027-60

90 V

150 V

200 V

230 V

250 V

300 V

350 V

400 V

420 V

470 V

600 V

20 kA 10 x 10 kA 10 x 10 A rms, 1 s <1 pF 400 x 500 A

2037-09

2037-15

2037-20

2037-23

2037-25

2037-30

2037-35

2037-40

2037-42

2037-47

2037-60

90 V

150 V

200 V

230 V

250 V

300 V

350 V

400 V

420 V

470 V

600 V

10 kA 10 x 5 kA 10 x 5 A rms, 1 s <1 pF

300 x 100 A

or 500 x 100 A

10/700 µs

2035-09

2035-15

2035-20

2035-23

2035-25

2035-30

2035-35

2035-40

2035-42

2035-47

2035-60

90 V

150 V

200 V

230 V

250 V

300 V

350 V

400 V

420 V

470 V

600 V

10 kA 10 x 5 kA 10 x 5 A rms, 1 s <2 pF

300 x 100 A

or 500 x 100 A

10/700 µs

GDT Product Dimensions

0.6

(.024)

1.6

(.063)

9.0

(.354)

11.7

(.460)

7.8

(.307)

1.0

(.04) DIA.

7.5

(.29)

0.7 - 1.0

(.028 - .040)

1.0

(.04) DIA.

REF.

7.9

(.311) 11.2

(.440)

MAX.

13.0

(.512)

REF.

15.5

(.610)

MIN.

4.5

(.177)

4.4

(.173)

4.4

(.173)

1.0

(.04) DIA.

7.5

(.295)

MIN.

4.5

(.177)

4.75

(.187)

4.75

(.187)

1.0

(.04) DIA.

2026-XX-A 2026-XX-C8

1.0

(.04) DIA.

(1.2)

LONG

2 PLCS.

7.5

(.29)

2026-XX-C – 1.0 mm (0.040 ˝) dia. lead wire

2026-XX-CB – 0.8 mm (0.032 ˝) dia. lead wire

2026-XX-A1

1.0

(.04) DIA.

7.5

(0.3)

MIN.

4.4

(0.18)

5.5

(0.22) 5.5

(0.22)

2026-XX-C13

8.1

(.32)

9.8

(.38)

Fail-Short Conﬁguration

2026-XX-C2F Shown

2026-XX-C2

7.5

(.295)

6.6

(.26)

6.6

(.26)

1.0

(.04)

DIA.

REF.

2026-XX-C14

2026-XX-C3

1.0

(.04) DIA.

3.04

(.120)

17.8

(.70)

3.93

(.155)

6.4

(.25) 6.4

(.25)

2026-XX-C18

Specifications are subject to change without notice.

Customers should verify actual device

performance in their specific applications.

DIMENSIONS = MILLIMETERS

(INCHES)

GDT Product Dimensions

5.1

(.202)

0.7 - 1.0

(.028 - .040)

DIA.

7.4 - 7.7

(.290 - .303)

2036-XX-A

4.0

(.157)

25.0

(0.99) LONG MIN.

0.8

(.032)

4.0

(.157)

25.0

(0.99) LONG MIN.

2036-XX-B – 0.8 mm (0.032 ˝) dia. lead wire

2036-XX-C – 1.0 mm (0.040 ˝) dia. lead wire*

15.5

(.61)

7.4

(.29)

4.3

(.17)

2026-XX-C2M1XX

7.4

(0.29)

3.8

(0.15)

3.8

(0.15)

14.2

(.558)

8.9

(.352)

2026-XX-C16M1XX

4.0

(.157)

0.8

(.032)

2036-XX-B8 – 0.8 mm (0.032 ˝) dia. lead wire

2036-XX-C8 – 1.0 mm (0.040 ˝) dia. lead wire*

6.2

(.244)

5.3

(.208)

Fail-Short Conﬁguration

2036-XX-B2F Shown

4.0

(.157)

1.0

(.040)

Center Electrode Lead: C-Conﬁguration

4.0

(.157)

4.4

(.173)

4.4

(.173)

2036-XX-B2 – 0.8 mm (0.032 ˝) dia. lead wire

2036-XX-C2 – 1.0 mm (0.040 ˝) dia. lead wire*

4.0

(.157)

3.8

(.150)

3.8

(.150)

2036-XX-B3 – 0.8 mm (0.032 ˝) dia. lead wire

2036-XX-C3 – 1.0 mm (0.040 ˝) dia. lead wire*

4.0

(.157)

9.5

(.374)

19.0

(.748)

2036-XX-B9 – 0.8 mm (0.032 ˝) dia. lead wire

2036-XX-C9 – 1.0 mm (0.040 ˝) dia. lead wire*

*Center Electrode Lead:

See Center Lead C-Configuration detail.

Optional

Conﬁguration

2026-23-C2M136

2026-25-C2M136

2026-33-C2M143

2026-23-C16M136

2026-25-C16M136

2026-33-C16M143

6.35

(.250)

6.35

(.250)

15.5

(.61)

1.02

(.040)

3 X DIA.

7.49

(.295)

2026-XX-C4M1XX

2026-23-C4M136

2026-25-C4M136

2026-33-C4M143

DIMENSIONS = MILLIMETERS

(INCHES)

Specifications are subject to change without notice.

Customers should verify actual device

performance in their specific applications.

6.0

(.236)

8.0

(.314) DIA.

2027-XX-A

5.0

(.197)

4.1

(.161)

DIA.

2035-XX-A

52.4

(2.1)

10.0

(0.4)

2027-XX-BT1 – 0.8 mm (0.032 ˝) dia. lead wire

(0.78)

LONG

2 PLCS.

MIN.

2035-XX-B – 0.8 mm (0.032 ˝) dia. lead wire

2035-XX-C – 1.0 mm (0.040 ˝) dia. lead wire

7.6

(.30)

3.8

(.15)

16.7

(.658)REF.

14.2

(.560)MIN.

2035-XX-B5 – 0.8 mm (0.032 ˝) dia. lead wire

2035-XX-C5 – 1.0 mm (0.040 ˝) dia. lead wire

65.0

(2.5)

30.0

(1.2)

2 PLCS.

LONG

2027-XX-B – 0.8 mm (0.032 ˝) dia. lead wire

2027-XX-C – 1.0 mm (0.040 ˝) dia. lead wire

8.1

(.318)

2.0

(.078)

1.5

(.060)

12.7

(.500)

0.8

(.030)

2 PLCS.

2.0

(.075)

2 PLCS.

2027-XX-B10 – 0.8 mm (0.032 ˝) dia. lead wire

2027-XX-C10 – 1.0 mm (0.040 ˝) dia. lead wire

GDT Product Dimensions

Specifications are subject to change without notice.

Customers should verify actual device

performance in their specific applications.

DIMENSIONS = MILLIMETERS

(INCHES)

GDT Product Dimensions

5.0

(.197)

5.0

(.197)

DIA.

2037-XX-A

4.4

(.173)

3.9

(.155)

1.3

(.050)

4.8

(.190) DIA.

5.0

(.195) 5.6

(.220)

2035-XX-SM Recommended Pad Layout

7.2

(.283)

3.3

(.130)

0.9

(.035)

0.5

(.020)

0.7

(.028)

8.2

(.323)

1.6

(.063)

4.8

(.190) DIA.

6.2

(.244) DIA.

5.0

(.195) DIA.

5.0

(.195) 5.6

(.220)

2036-XX-SM

(0.78)

LONG

2 PLCS.

MIN.

2037-XX-B – 0.8 mm (0.032 ˝) dia. lead wire

2037-XX-C – 1.0 mm (0.040 ˝) dia. lead wire

7.6

(.30)

3.8

(.15)

16.7

(.658)REF.

14.2

(.560)MIN.

2037-XX-B5 – 0.8 mm (0.032 ˝) dia. lead wire

2037-XX-C5 – 1.0 mm (0.040 ˝) dia. lead wire

Specifications are subject to change without notice.

Customers should verify actual device

performance in their specific applications.

DIMENSIONS = MILLIMETERS

(INCHES)

Recommended Pad Layout

Bourns®TISP®Thyristor Surge Protectors

Selection Guide

Bourns® TISP® thyristor surge protector products

prevent damage from overvoltages, as these silicon

based devices initially clamp the line voltage to limit

overvoltages on telephone lines, then switch to a low

voltage “On” state. After the surge, when the current

drops below the “holding current,” the protector

returns to its original high impedance state.

Features

• Extensive range offering multiple voltage variants

• Surface mount and through-hole packages

• Designed to withstand international lightning.

Fixed Voltage Gated (Programmable) Voltage

Series Device Symbol Applications

TISP1xxx

Dual

Unidirectional

• SLIC Line Card

TISP3xxx

TISPL758L

Dual Bidirectional

• 3 Wire Ground

Backed Ringer

• Solid State Relay

• Surge Bars

TISP4xxx

Single

Bidirectional

• Modems

• Telephones

• Fax Machines

• xDSL

• Set Top Boxes

• Surge Bars

TISP5xxx

Single

Unidirectional

• SLIC Line Card

• ISDN

TISP70xx

Triple

Unidirectional

• xDSL

• ISDN

• T1/E1/E3

Series Device Symbol Applications

TISP6xxx

TISPPBLx

Dual

Programmable

• SLIC Line Card

• Ericsson PBL3xx

SLIC

TISP6NTP2x

Quad

Programmable

• Dual SLIC Lines

• Cable Modems

• ISDN Power

Feeds

• Smart NT

• Set Top Boxes

TISP83121

Dual Gate

Unidirectional

• Positive &

Negative Polarity

Ringing SLICs

TISP8200

Dual

Programmable

Unidirectional for

Negative Polarity

• Analog Line Card

• Dual Supply

Ringing SLIC

TISP8200 &

TISP8201 typically

used as a

complementary

pair

TISP8201

Dual

Programmable

Unidirectional for

Positive Polarity

TISP9xxx

Integrated

Complementary

Buffered-Gate

Protector for Dual

Polarity Protection

• CO & Access

Equipment Line

Cards

• Protection of

Dual Polarity

Ringing SLICs

TRK1

G1,G2

G3,G4

G1,G2

T1 T2

Telecom System Primary Overvoltage Protection

Series Applications

2ELx

7ELx

Single

Bidirectional

• Solid state

replacement for

Gas Discharge

Tubes

Ground

Line

TISP1xxxF3 Series – Dual Unidirectional Overvoltage Protectors (IH= -150 mA)

General fixed voltage SLIC protection for Line Cards and VOIP

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP1072F3 DR, P, SL -58 -72

80 35 50

TISP1082F3 DR, P, SL -66 -82

TISP1xxxH3 Series – Dual Unidirectional Overvoltage Protectors (IH= -150 mA)

SLIC protection for Line Cards and VOIP

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP1070H3 BJR -58 -70

500 100 150

TISP1080H3 BJR -65 -80

TISP1095H3 BJR -75 -95

TISP1120H3 BJR -95 -120

TISP3xxx Series – Dual Bidirectional Overvoltage Protectors (IH= 150 mA)

Legerity and Intersil Line Card Access Switch (LCAS) protection, L7581/2/3 protection – TISPL758L3

General 3-point protection – TISP3xxxF3

CO Line Card and CPE modem protection where a ground is available – TISP3xxxT3

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISPL758LF3†DR 105, 180 130, 220 175 35 50

TISP3072F3 DR, P, SL 58 72 80 35 50

TISP3082F3 DR, P, SL 66 82

TISP3125F3 DR, P, SL 100 125

175 35 50

TISP3150F3 DR, P, SL 120 150

TISP3180F3 DR, P, SL 145 180

TISP3240F3 DR, P, SL 180 240

TISP3260F3 DR, P, SL 200 260

TISP3290F3 DR, P, SL 220 290

TISP3320F3 DR, P, SL 240 320

TISP3380F3 DR, P, SL 270 380

TISP3600F3 SL 420 600 190 45 70

TISP3700F3 SL 500 700

TISP3070T3 BJR 58 70

250 80 120

TISP3080T3 BJR 65 80

TISP3095T3 BJR 75 95

TISP3115T3 BJR 90 115

TISP3125T3 BJR 100 125

TISP3145T3 BJR 120 145

TISP3165T3 BJR 135 165

TISP3180T3 BJR 145 180

TISP3200T3 BJR 155 200

TISP3219T3 BJR 180 219

TISP3250T3 BJR 190 250

TISP3290T3 BJR 220 290

TISP3350T3 BJR 275 350

TISP3395T3 BJR 320 395

TISP3070H3 SL 58 70

500 100 200

TISP3080H3 SL 65 80

TISP3095H3 SL 75 95

TISP3115H3 SL 90 115

TISP3125H3 SL 100 125

TISP3135H3 SL 110 135

TISP3145H3 SL 120 145

TISP3180H3 SL 145 180

TISP3210H3 SL 160 210

TISP3250H3 SL 190 250

TISP3290H3 SL 220 290

TISP3350H3 SL 275 350

TISP4xxxF3 Series – Single Bidirectional Overvoltage Protectors (IH= 150 mA)

General purpose 2-point protection

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4072F3 LM, LMR, LMFR 58 72 80 35 50

TISP4082F3 LM, LMR, LMFR 66 82

TISP4125F3 LM, LMR, LMFR 100 125

175 35 50

TISP4150F3 LM, LMR, LMFR 120 150

TISP4180F3 LM, LMR, LMFR 145 180

TISP4240F3 LM, LMR, LMFR 180 240

TISP4260F3 LM, LMR, LMFR 200 260

TISP4290F3 LM, LMR, LMFR 220 290

TISP4320F3 LM, LMR, LMFR 240 320

TISP4380F3 LM, LMR, LMFR 270 380

TISP4600F3 LM, LMR, LMFR 420 600 190 45 70

TISP4700F3 LM, LMR, LMFR 500 700

TISP4xxxL1 Series – Single Bidirectional Overvoltage Protectors (IH= 50 mA)

Dataline protection such as E1/T1 or xDSL with ITU-T compliance

Ideal for use with MF-RX018/250 Multifuse® PPTC device

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4015L1 AJR, BJR 8 15

150 30 45TISP4030L1 AJR, BJR 15 30

TISP4040L1 AJR, BJR 25 40

TISP4xxxL3 Series – Single Bidirectional Overvoltage Protectors (IH= 150 mA)

General 2-point protection for European applications

Ideal for use with MF-SM013/250 Multifuse® PPTC device

TISP4xxxL3 Series – Single Bidirectional Overvoltage Protectors (IH= 150 mA)

General 2-point protection for European applications

Ideal for use with MF-SM013/250 Multifuse® PPTC device

TISP4xxxMM Series – Single Bidirectional Overvoltage Protectors (IH= 150 mA)

General 2-point protection for European applications

Ideal for use with MF-SM013/250 Multifuse® PPTC device

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4070L3 AJR 58 70

125 30 50

TISP4080L3 AJR 65 80

TISP4090L3 AJR 70 90

TISP4125L3 AJR 100 125

TISP4145L3 AJR 120 145

TISP4165L3 AJR 135 165

TISP4180L3 AJR 145 180

TISP4220L3 AJR 160 220

TISP4240L3 AJR 180 240

TISP4260L3 AJR 200 260

TISP4290L3 AJR 230 290

TISP4320L3 AJR 240 320

TISP4350L3 AJR 275 350

TISP4360L3 AJR 290 360

TISP4395L3 AJR 320 395

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

TIA-968-A

10/160 µs

(A)

TIA-968-A

5/310 µs

(A)

TIA-968-A

10/560 µs

(A)

TISP4070L3 BJR 58 70

50 40 30

TISP4350L3 BJR 275 350

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4300MM AJR, BJR 230 300

250 55 50TISP4350MM AJR, BJR 275 350

TISP4360MM AJR, BJR 290 360

TISP4xxxM3 Series – Single Bidirectional Overvoltage Protectors (IH= 150 mA)

General 2-point protection

Ideal for use with MF-SM013/250 Multifuse® PPTC device

TISP4xxxT3 Series – Single Bidirectional Overvoltage Protectors for Modem Protection (IH= 150 mA)

TIA-968-A protection

Ideal for use with Telefuse™ B1250 or Multifuse® MF-R015/600 PPTC device

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4070M3 AJR, BJR, LM, LMR, LMFR 58 70

300 50 100

TISP4080M3 AJR, BJR, LM, LMR, LMFR 65 80

TISP4095M3 AJR, BJR, LM, LMR, LMFR 75 95

TISP4115M3 AJR, BJR, LM, LMR, LMFR 90 115

TISP4125M3 AJR, BJR, LM, LMR, LMFR 100 125

TISP4145M3 AJR, BJR, LM, LMR, LMFR 120 145

TISP4165M3 AJR, BJR, LM, LMR, LMFR 135 165

TISP4180M3 AJR, BJR, LM, LMR, LMFR 145 180

TISP4200M3 AJR, BJR 155 200

TISP4219M3 BJR 180 219

TISP4220M3 AJR, BJR, LM, LMR, LMFR 160 220

TISP4240M3 AJR, BJR, LM, LMR, LMFR 180 240

TISP4250M3 AJR, BJR, LM, LMR, LMFR 190 250

TISP4260M3 LM, LMR, LMFR 200 260

TISP4265M3 AJR, BJR, LM, LMR, LMFR 200 265

TISP4290M3 AJR, BJR, LM, LMR, LMFR 220 290

TISP4300M3 AJR, BJR, LM, LMR, LMFR 230 300

TISP4350M3 AJR, BJR, LM, LMR, LMFR 275 350

TISP4360M3 AJR, BJR, LM, LMR, LMFR 290 360

TISP4395M3 AJR, BJR, LM, LMR, LMFR 320 395

TISP4400M3 BJR, LM, LMR, LMFR 300 400

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4290T3 BJR 220 290

250 80 120TISP4350T3 BJR 275 350

TISP4400T3 BJR 335 400

TISP4xxxH1 Series – Single Bidirectional Overvoltage Protectors (IH= 50 mA)

Dataline protection such as E1/T1 or xDSL with GR-1089-CORE compliance

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4015H1 BJR 8 15

500 100 150TISP4030H1 BJR 15 30

TISP4040H1 BJR 25 40

TISP4xxxH3 Series – Single Bidirectional Overvoltage Protectors (IH= 150 mA)

General telecom protection, either for enhanced ITU-T or Telecordia GR-1089-CORE designs

Ideal for use with Telefuse™ B1250T and Multifuse® MF-R015/600 PPTC device

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4070H3 BJR, LM, LMR, LMFR 58 70

500 100 200

TISP4080H3 BJR, LM, LMR, LMFR 65 80

TISP4095H3 BJR, LM, LMR, LMFR 75 95

TISP4115H3 BJR, LM, LMR, LMFR 90 115

TISP4125H3 BJR, LM, LMR, LMFR 100 125

TISP4145H3 BJR, LM, LMR, LMFR 120 145

TISP4165H3 BJR, LM, LMR, LMFR 135 165

TISP4180H3 BJR, LM, LMR, LMFR 145 180

TISP4200H3 BJR, LM, LMR, LMFR 155 200

TISP4219H3 BJR 180 219

TISP4220H3 BJR 160 220

TISP4240H3 BJR, LM, LMR, LMFR 180 240

TISP4250H3 BJR, LM, LMR, LMFR 190 250

TISP4260H3 LM, LMR, LMFR 200 260

TISP4265H3 BJR 200 265

TISP4290H3 BJR, LM, LMR, LMFR 220 290

TISP4300H3 BJR, LM, LMR, LMFR 230 300

TISP4350H3 BJR, LM, LMR, LMFR 275 350

TISP4360H3 BJR 290 360

TISP4395H3 BJR, LM, LMR, LMFR 320 395

TISP4400H3 BJR, LM, LMR, LMFR 300 400

TISP4500H3 BJR 320 500

TISP4xxxH4 Series – Single Bidirectional Overvoltage Protectors (IH= 225 mA)

Full temperature general overvoltage protection, where holding current must exceed 150 mA

TISP4xxxJ1 Series – Single Bidirectional Overvoltage Protectors (IH= 20 mA)

General high current dry line data protection or bottom element in a “Y” protection solution

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4165H4 BJR 135 165

500 100 200

TISP4180H4 BJR 145 180

TISP4200H4 BJR 155 200

TISP4265H4 BJR 200 265

TISP4300H4 BJR 230 300

TISP4350H4 BJR 270 350

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4070J1 BJR 58 70

1000 200 350

TISP4080J1 BJR 65 80

TISP4095J1 BJR 75 95

TISP4115J1 BJR 90 115

TISP4125J1 BJR 100 125

TISP4145J1 BJR 120 145

TISP4165J1 BJR 135 165

TISP4180J1 BJR 145 180

TISP4200J1 BJR 155 200

TISP4219J1 BJR 180 219

TISP4250J1 BJR 190 250

TISP4290J1 BJR 220 290

TISP4350J1 BJR 275 350

TISP4395J1 BJR 320 395

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4C290H3 BJR 220 290

500 100 150TISP4C350H3 BJR 275 350

TISP4C395H3 BJR 320 395

TISP4CxxxH3 Series – Low Capacitance Single Bidirectional Overvoltage Protectors (IH= 150 mA)

General low capacitance telecom protection for xDSL or data applications

TISP4xxxJ3 Series – Single Bidirectional Overvoltage Protectors (IH= 150 mA)

High current POTS protection or powered xDSL protection

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP5070H3 BJR -58 -70

500 100 200

TISP5070H3 BJR -65 -80

TISP5110H3 BJR -80 -110

TISP5115H3 BJR -90 -115

TISP5150H3 BJR -120 -150

TISP5190H3 BJR -160 -190

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP4290J3 BJR 220 290

1000 200 350TISP4350J3 BJR 275 350

TISP4395J3 BJR 320 395

TISP5xxxH3 Series – Single Unidirectional Overvoltage Protectors (IH= -150 mA)

General fixed voltage SLIC protection ideal for VOIP applications

TISP7xxxL1 Series – Triple Bidirectional Overvoltage Protectors (IH= 30 mA)

Balanced 3-point protection for ISDN or xDSL data communications applications

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

TIA-968-A

10/160 µs

(A)

TIA-968-A

5/310 µs

(A)

TIA-968-A

10/560 µs

(A)

TISP7015L1 DR 8 15

200 30 50

TISP7038L1 DR 28 38

T1 T2

TISP7xxx Series – Triple Bidirectional Overvoltage Protectors (IH= 150 mA)

General balanced 3-point protection – TISP70xxF3

General balanced 3-point protection typically for European ITU-T applications – TISP7xxxF3

General balanced 3-point protection typically for Telecordia GR-1089-CORE applications – TISP7xxxH3

T1 T2

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP7072F3 DR, P, SL 58 72 85 45 70

TISP7082F3 DR, P, SL 66 82

TISP7125F3 DR, P, SL 100 125

190 45 70

TISP7150F3 DR, P, SL 120 150

TISP7180F3 DR, P, SL 145 180

TISP7240F3 DR, P, SL 180 240

TISP7260F3 DR, P, SL 200 260

TISP7290F3 DR, P, SL 220 290

TISP7320F3 DR, P, SL 240 320

TISP7350F3 DR, P, SL 275 350

TISP7380F3 DR, P, SL 270 380

TISP7070H3 SL 58 70

500 100 200

TISP7080H3 SL 65 80

TISP7095H3 SL 75 95

TISP7125H3 SL 100 125

TISP7135H3 SL 110 135

TISP7145H3 SL 120 145

TISP7165H3 SL 130 165

TISP7180H3 SL 145 180

TISP7200H3 SL 150 200

TISP7210H3 SL 160 210

TISP7220H3 SL 160 210

TISP7250H3 SL 200 250

TISP7290H3 SL 230 290

TISP7350H3 SL 275 350

TISP7400H3 SL 300 400

TISP6xxx Series – Programmable Overvoltage Protectors for SLIC Protection

Ringing SLIC protection for CO and VOIP applications

Alternative to Legerity (Previously Lucent) L7591 protector – TISPL7591

Infineon (previously Ericsson) PBL386 SLIC protection – TISPPBL1, BL2, BL3

TISP6NPT2x Series – Programmable Overvoltage Protectors for Dual SLIC Protection

Dual SLIC VOIP applications, with reduced protection cost per line

TISP83121 – Dual-Gate Unidirectional Overvoltage Protectors for Dual Supply SLIC Protection

±ve protection for multiple lines on CO Line Cards

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP61089H DM Programmable -20 to -170 V 500 100 150

TISP61060 DR, P Programmable -5 to -85 V 50

30 40

TISP61089 DR, P Programmable -20 to -85 V 120

TISP61089A DR, P Programmable -20 to -120 V 120

TISP61089B DR Programmable -20 to -170 V 120

TISP61511 DR Programmable 0 to -85 V 170

TISP61512 P Programmable 0 to -85 V 170

TISP61521 DR Programmable 0 to -170 V 170

TISPL7591 DR Programmable 0 to -80 V 80

TISPPBL1 DR, P, SE Programmable 0 to -90 V 100

TISPPBL2 DR, P Programmable 0 to -90 V 100

TISPPBL3 DR Programmable 0 to -170 V 100

G1,G2

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP6NTP2A DR Programmable 0 to -90 V 85 20 25

TISP6NTP2C DR Programmable 0 to -170 V 90 25 40

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP83121 DR Programmable 0 to ±100 V 150 250

G3,G4

G1,G2

TISP820xM Series – Dual Unidirectional Reverse Blocking Programmable

Overvoltage Protectors for Dual Supply SLIC Protection

Protection for Infineon PEB4265 and Legerity 79R251 SLICs

TISP9110LDM – Integrated Complementary Buffered-Gate SCRs for Dual Polarity SLIC Overvoltage Protection

Integrated ITU-T or GR-1089-CORE intrabuilding protection for Infineon PEB4265 and Legerity 79R251 SLICs

‘EL’ Series – Single Bidirectional Primary Overvoltage Protectors for GR-974-CORE Designs

CO Primary Protection – 2EL2, 2EL3, 2EL4

CO Primary Protection for Datalines – 2EL5

High Exposure Station Protector – 2EL6

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

Holding

Current

(mA)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP8200M DR Programmable 0 to -90 V -150 -210 -45 -70

TISP8201M DR Programmable 0 to +90 V 20 210 45 70

Device Delivery

Options

Standoff

Voltage

VDRM

(V)

Protection

Voltage

V(BO)

(V)

Holding

Current

(mA)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

GR-1089-CORE

10/1000 µs

(A)

ITU-T K20/21

5/310 µs

(A)

TISP9110L DM Programmable

+110 to -110 V

+20,

-150 100 30 45

Ground

Line

Device Delivery

Options

Protection

Voltage

V(BO)

(V)

ITSP Ratings for Lightning Surge Standards

GR-1089-CORE

2/10 µs

(A)

ITU-T K20/21

5/310 µs

(A)

2EL2 Button Cell 265 V to 400 V 100 125

2EL3 Button Cell 200 V to 265 V 100 125

2EL4 Button Cell 215 V to 265 V 100 125

2EL5 Button Cell 65 V to 90 V 100 125

7EL2 Button Cell 265 V to 400 V 300 400

TISP® Product Dimensions

SMAJ – Plastic Surface Mount Diode

Suffix – AJR

SMBJ – Plastic Surface Mount Diode

Suffix – BJ, BJR

Index

Mark

(if needed)

2.29 - 2.92

(.090 - .115)

4.06 - 4.57

(.160 - .180)

2.00 - 2.40

(.079 - .095)

0.76 - 1.52

(.030 - .060)

4.83 - 5.59

(.190 - .220)

1.58 - 2.16

(.062 - .085)

0.10 - 0.20

(.004 - .008)

1.27 - 1.63

(.050 - .064)

Index

Mark

(if needed)

4.06 - 4.57

(.160 - .180)

3.30 - 3.94

(.130 - .155)

1.96 - 2.32

(.077 - .091)

0.10 - 0.20

(.004 - .008)

0.76 - 1.52

(.030 - .060)

2.00 - 2.40

(.079 - .094)

1.90 - 2.10

(.075 - .083)

5.21 - 5.59

(.205 - .220)

DIMENSIONS = MILLIMETERS

(INCHES)

SOIC – Plastic Small Outline

Suffix – D, DR

8765

INDEX

4.80 - 5.00

(0.189 - 0.197)

5.80 - 6.20

(0.228 - 0.244)

3.81 - 4.00

(0.150 - 0.157)

1.35 - 1.75

(0.053 - 0.069)

0.102 - 0.203

(0.004 - 0.008)

0.28 - 0.79

(0.011 - 0.031)

0.51 - 1.12

(0.020 - 0.044)

4.60 - 5.21

(0.181 - 0.205)

0.36 - 0.51

(0.014 - 0.020)

0.25 - 0.50

(0.010 - 0.020)

0.190 - 0.229

(0.0075 - 0.0090)

Pin Spacing

1.27

(0.050)

(see Note A)

6 places

x 45 N0M

8 Places

7 NOM

4 Places

7 NOM

3 Places

4 4

DIMENSIONS = MILLIMETERS

(INCHES)

2.00 - 2.40

(.079 - .094)

0.10 - 0.20

(.004 - .008)

5.21 - 5.59

(.205 - .220)

0.56 - 0.71

(.022 - .028)

3.30 - 3.94

(.130 - .155)

4.06 - 4.57

(.160 - .180)

0.76 - 1.52

(.030 - .060)

1.90 - 2.10

(.075 - .083) 0.79 - 0.94

(.031 - .037)

1.42 - 1.57

(.056 - .062)

SMB03 (Modiﬁed DO-214AA Package)

DO92 – Cylindrical Plastic

Suffix – LM, LMR, LMFR

VIEW A

4.44 - 5.21

(.175 - .205)

3.43

(.135)

4.32 - 5.34

(.170 - .210)

3.17 - 4.19

(.125 - .165)

2.03 - 2.67

(.080 - .105)

0.40 - 0.56

(.016 - .022)

0.35 - 0.41

(.014 - .016)

MIN.

2.20

(.086)

MAX.

12.7

(0.5)

MIN.

1.14 - 1.40

(.045 - .055)

2.41 - 2.67

(.095 - .105)

2.03 - 2.67

(.080 - .105)

VIEW A

4.44 - 5.21

(.175 - .205)

3.43

(.135)

4.32 - 5.34

(.170 - .210)

3.17 - 4.19

(.125 - .165)

2.03 - 2.67

(.080 - .105)

2.03 - 2.67

(.080 - .105)

0.40 - 0.56

(.016 - .022)

0.35 - 0.41

(.014 - .016)

MIN.

2.20

(.086)

MAX. 4.00

(.157)

MAX.

2.40 - 2.90

(.094 - .114)

2.40 - 2.90

(.094 - .114)

SOIC – 8-pin Plastic Small Outline (210 mil)

Suffix – DM

7.40 - 8.20

(0.291 - 0.323)

(0.197 - 0.220)

5.00 - 5.60

(0.087)

2.20 MAX.

(0.197 - 0.220)

5.00 - 5.60

0.10

(0.004) MIN.

TYP.

1.27

(0.050)

0.35 - 0.51

(0.014 - 0.200)

DIMENSIONS = MILLIMETERS

(INCHES)

312 4

8765

Seating

Plane

Index

Notch

9.25 - 9.75

(0.364 - 0.384)

6.10 - 6.60

(0.240 - 0.260)

5.08

(0.200)

1.78

(0.070) MAX.

4 Places

8 Places

MAX.

3.17

(0.125) MIN.

0.51

(0.020) MIN.

2.54

(0.100) Typical

(see Note A)

6 Places

0.38 - 0.53

(0.015 - 0.021)

7.62 - 8.23

(0.300 - 0.324)

8.38 - 9.40

(0.330 - 0.370)

0.20 - 0.36

(0.008 - 0.014)

PDIP – Plastic Dual-in-Line

Suffix – P

DIMENSIONS = MILLIMETERS

(INCHES)

DIMENSIONS = MILLIMETERS

(INCHES)

Index

Notch

9.25 - 9.75

(0.364 - 0.384)

3.20 - 3.40

(0.126 - 0.134)

6.10 - 6.60

(0.240 - 0.260)

0.203 - 0.356

(0.008- 0.014)

0.559 - 0.711

(0.022 - 0.028)

3 Places

12.9

(0.492)

4.267

(0.168)

MIN.

MAX.

1.854

(0.073)

MAX.

8.31

(0.327)

MAX.

2.54

(0.100) Typical

(See Note A)

2 Places

SIP – Plastic Single-in-Line

Suffix – SL

2.11 - 2.31

(0.083 - 0.091)

0.508

(0.020) MAX.

0.178

(0.007) MAX.

To p E le c tr o de

Sleeve

Bidirectional

Bottom Electrode

Silicon Chip

1.27 - 1.65

(0.050 - 0.065) DIA.2 x

3.76 - 4.27

(0.148 - 0.168) DIA.

9ELX – Primary Protector Series

To p Electrode

Sleeve

Bidirectional

Silicon Chip

Bottom Electrode

2.16 - 2.45

(0.085 - 0.096)

0.508

(0.020) MAX.

0.178

(0.007) MAX.

2.16 - 2.67

(0.085 - 0.105) DIA.

6.10

(0.240) DIA.

7EL2 – Primary Protector

DIMENSIONS = MILLIMETERS

(INCHES)

2.11 - 2.31

(0.083 - 0.091)

0.508

(0.020) MAX.

0.178

(0.007) MAX.

To p E le c t r o de

Sleeve

Bidirectional

Bottom Electrode

Silicon Chip

1.27 - 1.65

(0.050 - 0.065) DIA.2 x

3.76 - 4.27

(0.148 - 0.168) DIA.

Button Cell

DIMENSIONS = MILLIMETERS

(INCHES)

TVS Diodes

Selection Guide

Bourns offers Transient Voltage Suppressor diodes for

low energy surge and ESD protection applications

that meet the following standards: IEC 61000-4-2,

IEC 61000-4-4 and IEC 61000-4-5

Features

• Compact package options: DO-214AC (SMA),

DO-214AA (SMB) and DO-214AB (SMC)

•Working Peak Reverse Voltages

from 5 V up to 170 V

• Breakdown Voltages up to 200 V

• Typical fast response times are less than 1.0 ns

(Unidirectional), 5.0 ns (Bidirectional)

• Conforms to JEDEC standards

• Easy to handle on standard pick and place

equipment

• Flat configuration minimizes roll away

• RoHS compliance optional

Minimum Peak Pulse

Power Dissipation

(TP = 1 ms)

PPK

Working Peak

Reverse Voltages

VRWM

Peak Forward Surge Current

8.3 ms Single Half Sine Wave

Superimposed on Rated Load

(JEDEC Method)

Package

Reference*

CD214A-TX.XX 400 W 5 to 170 V 40 A SMA

CD214B-TX.XX 600 W 5 to 170 V 100 A SMB

CD214C-TX.XX 1500 W 5 to 170 V 200 A SMC

*See data sheet for mechanical specification.

CD214A Series (SMA Package)

Electrical Characteristics (@ TA= 25 °C unless otherwise noted)

Part Number

(Unidirectional

Device)

Part

Mrkg

Part Number

(Bidirectional

Device)

Part

Mrkg

Breakdown Voltage

VBR Volts

Working Peak

Reverse

Voltage

Max. Reverse

Leakage

at VRWM

Max. Reverse

Voltage

at IRSM

Max. Reverse

Surge Current Pkg

Min. Max. @IT (mA) VRWM (Volts) IR(uA) VRSM (Volts) IRSM (Amps)

CD214A-T5.0A HE CD214A-T5.0CA TE 6.40 7.00 10 5.0 800 / 1600 9.2 43.5 SMA

CD214A-T6.0A HG CD214A-T6.0CA TG 6.67 7.37 10 6.0 800 / 1600 10.3 38.8 SMA

CD214A-T6.5A HK CD214A-T6.5CA TK 7.22 7.98 10 6.5 500 / 1000 11.2 35.7 SMA

CD214A-T7.0A HM CD214A-T7.0CA TM 7.78 8.60 10 7.0 200 / 400 12.0 33.3 SMA

CD214A-T7.5A HP CD214A-T7.5CA TP 8.33 9.21 1.0 7.5 100 / 200 12.9 31.0 SMA

CD214A-T8.0A HR CD214A-T8.0CA TR 8.89 9.83 1.0 8.0 50 / 100 13.6 29.4 SMA

CD214A-T8.5A HT CD214A-T8.5CA TT 9.44 10.4 1.0 8.5 10 / 20 14.4 27.7 SMA

CD214A-T9.0A HV CD214A-T9.0CA TV 10.0 11.1 1.0 9.0 5 / 10 15.4 26.0 SMA

CD214A-T10A HX CD214A-T10CA TX 11.1 12.3 1.0 10 5 / 10 17.0 23.5 SMA

CD214A-T11A HZ CD214A-T11CA TZ 12.2 13.2 1.0 11 5.0 18.2 22.0 SMA

CD214A-T12A IE CD214A-T12CA UE 13.3 14.7 1.0 12 5.0 19.9 20.1 SMA

CD214A-T13A IG CD214A-T13CA UG 14.4 15.9 1.0 13 5.0 21.5 18.6 SMA

CD214A-T14A IK CD214A-T14CA UK 15.6 17.2 1.0 14 5.0 23.2 17.2 SMA

CD214A-T15A IM CD214A-T15CA UM 16.7 18.5 1.0 15 5.0 24.4 16.4 SMA

CD214A-T16A IP CD214A-T16CA UP 17.8 19.7 1.0 16 5.0 26.0 15.3 SMA

CD214A-T17A IR CD214A-T17CA UR 18.9 20.9 1.0 17 5.0 27.6 14.5 SMA

CD214A-T18A IT CD214A-T18CA UT 20.0 22.1 1.0 18 5.0 29.2 13.7 SMA

CD214A-T20A IV CD214A-T20CA UV 22.2 24.5 1.0 20 5.0 32.4 12.3 SMA

CD214A-T22A IX CD214A-T22CA UX 24.4 26.9 1.0 22 5.0 35.5 11.2 SMA

CD214A-T24A IZ CD214A-T24CA UZ 26.7 29.5 1.0 24 5.0 38.9 10.3 SMA

CD214A-T26A JE CD214A-T26CA VE 28.9 31.9 1.0 26 5.0 42.1 9.5 SMA

CD214A-T28A JG CD214A-T28CA VG 31.1 34.4 1.0 28 5.0 45.4 8.8 SMA

CD214A-T30A JK CD214A-T30CA VK 33.3 36.8 1.0 30 5.0 48.4 8.3 SMA

CD214A-T33A JM CD214A-T33CA VM 36.7 40.6 1.0 33 5.0 53.3 7.5 SMA

CD214A-T36A JP CD214A-T36CA VP 40 44.2 1.0 36 5.0 58.1 6.9 SMA

CD214A-T40A JR CD214A-T40CA VR 44.4 49.1 1.0 40 5.0 64.5 6.2 SMA

CD214A-T43A JT CD214A-T43CA VT 47.8 52.8 1.0 43 5.0 69.4 5.7 SMA

CD214A-T45A JV CD214A-T45CA VV 50 55.3 1.0 45 5.0 72.7 5.5 SMA

CD214A-T48A JX CD214A-T48CA VX 53.3 58.9 1.0 48 5.0 77.4 5.2 SMA

CD214A-T51A JZ CD214A-T51CA VZ 56.7 62.7 1.0 51 5.0 82.4 4.9 SMA

CD214A-T54A RE CD214A-T54CA WE 60 66.3 1.0 54 5.0 87.1 4.6 SMA

CD214A-T58A RG CD214A-T58CA WG 64.4 71.2 1.0 58 5.0 93.6 4.3 SMA

CD214A-T60A RK CD214A-T60CA WK 66.7 73.7 1.0 60 5.0 96.8 4.1 SMA

CD214A-T64A RM CD214A-T64CA WM 71.1 78.6 1.0 64 5.0 103 3.9 SMA

CD214A-T70A RP CD214A-T70CA WP 77.8 86.0 1.0 70 5.0 113 3.5 SMA

CD214A-T75A RR CD214A-T75CA WR 83.3 92.1 1.0 75 5.0 121 3.3 SMA

CD214A-T78A RT CD214A-T78CA WT 86.7 95.8 1.0 78 5.0 126 3.2 SMA

CD214A-T85A RV CD214A-T85CA WV 94.4 104 1.0 85 5.0 137 2.9 SMA

CD214A-T90A RX CD214A-T90CA WX 100 111 1.0 90 5.0 146 2.7 SMA

CD214A-T100A RZ CD214A-T100CA WZ 111 123 1.0 100 5.0 162 2.5 SMA

CD214A-T110A SE CD214A-T110CA XE 122 135 1.0 110 5.0 177 2.3 SMA

CD214A-T120A SG CD214A-T120CA XG 133 147 1.0 120 5.0 193 2.0 SMA

CD214A-T130A SK CD214A-T130CA XK 144 159 1.0 130 5.0 209 1.9 SMA

CD214A-T150A SM CD214A-T150CA XM 167 185 1.0 150 5.0 243 1.6 SMA

CD214A-T160A SP CD214A-T160CA XP 178 197 1.0 160 5.0 259 1.5 SMA

CD214A-T170A SR CD214A-T170CA XR 189 209 1.0 170 5.0 275 1.4 SMA

Notes:

1. Sufﬁx “A” denotes 5 % tolerance device.

2. Sufﬁx “C” denotes Bidirectional device.

3. Sufﬁx “CA” denotes 5 % tolerance Bidirectional device.

4. 10 % tolerance devices are available but not shown above.

5. For Bidirectional devices having VR= 10 Volts or under, the IRlimit is double.

6. For Unidirectional devices having VFMax = 3.5 V at IF= 35 A, 0.5 Sine Wave of 8.3 ms pulse width.

7. For RoHS compliant devices, add sufﬁx "LF" to part number.

CD214B Series (SMB Package)

Electrical Characteristics (@ TA= 25 °C unless otherwise noted)

Part Number

(Unidirectional

Device)

Part

Mrkg

Part Number

(Bidirectional

Device)

Part

Mrkg

Breakdown Voltage

VBR Volts

Working Peak

Reverse

Voltage

Max. Reverse

Leakage

at VRWM

Max. Reverse

Voltage

at IRSM

Max. Reverse

Surge Current Pkg

Min. Max. @IT (mA) VRWM (Volts) IR(uA) VRSM (Volts) IRSM (Amps)

CD214B-T5.0A HKE CD214B-T5.0CA AE 6.40 7.25 10 5.0 800 9.2 65.2 SMB

CD214B-T6.0A KG CD214B-T6.0CA AG 6.67 7.67 10 6.0 800 10.3 58.3 SMB

CD214B-T6.5A KK CD214B-T6.5CA AK 7.22 8.30 10 6.5 500 11.2 53.6 SMB

CD214B-T7.0A KM CD214B-T7.0CA AM 7.78 8.95 10 7.0 200 12.0 50.0 SMB

CD214B-T7.5A KP CD214B-T7.5CA AP 8.33 9.58 1.0 7.5 100 12.9 46.5 SMB

CD214B-T8.0A KR CD214B-T8.0CA AR 8.89 10.2 1.0 8.0 50 13.6 44.1 SMB

CD214B-T8.5A KT CD214B-T8.5CA AT 9.44 10.8 1.0 8.5 20 14.4 41.7 SMB

CD214B-T9.0A KV CD214B-T9.0CA AV 10.0 11.5 1.0 9.0 10 15.4 39.0 SMB

CD214B-T10A KX CD214B-T10CA AX 11.1 12.8 1.0 10 5.0 17.0 35.3 SMB

CD214B-T11A KZ CD214B-T11CA AZ 12.2 14.4 1.0 11 5.0 18.2 33.0 SMB

CD214B-T12A LE CD214B-T12CA BE 13.3 15.3 1.0 12 5.0 19.9 30.2 SMB

CD214B-T13A LG CD214B-T13CA BG 14.4 16.5 1.0 13 5.0 21.5 27.9 SMB

CD214B-T14A LK CD214B-T14CA BK 15.6 17.9 1.0 14 5.0 23.2 25.8 SMB

CD214B-T15A LM CD214B-T15CA BM 16.7 19.2 1.0 15 5.0 24.4 24.0 SMB

CD214B-T16A LP CD214B-T16CA BP 17.8 20.5 1.0 16 5.0 26.0 23.1 SMB

CD214B-T17A LR CD214B-T17CA BR 18.9 21.7 1.0 17 5.0 27.6 21.7 SMB

CD214B-T18A LT CD214B-T18CA BT 20.0 23.3 1.0 18 5.0 29.2 20.5 SMB

CD214B-T20A LV CD214B-T20CA BV 22.2 25.5 1.0 20 5.0 32.4 18.5 SMB

CD214B-T22A LX CD214B-T22CA BX 24.4 28.0 1.0 22 5.0 35.5 16.9 SMB

CD214B-T24A LZ CD214B-T24CA BZ 26.7 30.7 1.0 24 5.0 38.9 15.4 SMB

CD214B-T26A ME CD214B-T26CA CE 28.9 32.2 1.0 26 5.0 42.1 14.2 SMB

CD214B-T28A MG CD214B-T28CA CG 31.1 35.8 1.0 28 5.0 45.4 13.2 SMB

CD214B-T30A MK CD214B-T30CA CK 33.3 38.3 1.0 30 5.0 48.4 12.4 SMB

CD214B-T33A MM CD214B-T33CA CM 36.7 42.2 1.0 33 5.0 53.3 11.3 SMB

CD214B-T36A MP CD214B-T36CA CP 40 46.0 1.0 36 5.0 58.1 10.3 SMB

CD214B-T40A MR CD214B-T40CA CR 44.4 51.1 1.0 40 5.0 64.5 9.3 SMB

CD214B-T43A MT CD214B-T43CA CT 47.8 54.9 1.0 43 5.0 69.4 8.6 SMB

CD214B-T45A MV CD214B-T45CA CV 50 57.5 1.0 45 5.0 72.7 8.3 SMB

CD214B-T48A MX CD214B-T48CA CX 53.3 61.3 1.0 48 5.0 77.4 7.7 SMB

CD214B-T51A MZ CD214B-T51CA CZ 56.7 65.2 1.0 51 5.0 82.4 7.3 SMB

CD214B-T54A NE CD214B-T54CA DE 60 69 1.0 54 5.0 87.1 6.9 SMB

CD214B-T58A NG CD214B-T58CA DG 64.4 74.6 1.0 58 5.0 93.6 6.4 SMB

CD214B-T60A NK CD214B-T60CA DK 66.7 76.7 1.0 60 5.0 96.8 6.2 SMB

CD214B-T64A NM CD214B-T64CA DM 71.1 81.8 1.0 64 5.0 103 5.8 SMB

CD214B-T70A NP CD214B-T70CA DP 77.8 89.5 1.0 70 5.0 113 5.3 SMB

CD214B-T75A NR CD214B-T75CA DR 83.3 95.8 1.0 75 5.0 121 4.9 SMB

CD214B-T78A NT CD214B-T78CA DT 86.7 99.7 1.0 78 5.0 126 4.7 SMB

CD214B-T85A NV CD214B-T85CA DV 94.4 109 1.0 85 5.0 137 4.4 SMB

CD214B-T90A NX CD214B-T90CA DX 100 116 1.0 90 5.0 146 4.1 SMB

CD214B-T100A NZ CD214B-T100CA DZ 111 128 1.0 100 5.0 162 3.7 SMB

CD214B-T110A PE CD214B-T110CA EE 122 140 1.0 110 5.0 177 3.4 SMB

CD214B-T120A PG CD214B-T120CA EG 133 153 1.0 120 5.0 193 3.1 SMB

CD214B-T130A PK CD214B-T130CA EK 144 165 1.0 130 5.0 209 2.9 SMB

CD214B-T150A PM CD214B-T150CA EM 167 192 1.0 150 5.0 243 2.5 SMB

CD214B-T160A PP CD214B-T160CA EP 178 205 1.0 160 5.0 259 2.3 SMB

CD214B-T170A PR CD214B-T170CA ER 189 218 1.0 170 5.0 275 2.2 SMB

Notes:

1. Sufﬁx “A” denotes 5 % tolerance device.

2. Sufﬁx “C” denotes Bidirectional device.

3. Sufﬁx “CA” denotes 5 % tolerance Bidirectional device.

4. 10 % tolerance devices are available but not shown above.

5. For Bidirectional devices having VR= 10 Volts or under, the IRlimit is double.

6. For Unidirectional devices having VFMax = 3.5 V at IF= 35 A, 0.5 Sine Wave of 8.3 ms pulse width.

7. For RoHS compliant devices, add sufﬁx "LF" to part number.

CD214C Series (SMC Package)

Electrical Characteristics (@ TA= 25 °C unless otherwise noted)

Part Number

(Unidirectional

Device)

Part

Mrkg

Part Number

(Bidirectional

Device)

Part

Mrkg

Breakdown Voltage

VBR Volts

Working Peak

Reverse

Voltage

Max. Reverse

Leakage

at VRWM

Max. Reverse

Voltage

at IRSM

Max. Reverse

Surge Current Pkg

Min. Max. @IT (mA) VRWM (Volts) IR(uA) VRSM (Volts) IRSM (Amps)

CD214C-T5.0A GDE CD214C-T5.0CA BDE 6.40 7.23 10 5.0 1000 9.2 163 SMC

CD214C-T6.0A GDG CD214C-T6.0CA BDG 6.67 7.67 10 6.0 1000 10.3 145.6 SMC

CD214C-T6.5A GDK CD214C-T6.5CA BDK 7.22 8.3 10 6.5 500 11.2 133.9 SMC

CD214C-T7.0A GDM CD214C-T7.0CA BDM 7.78 8.95 10 7.0 200 12.0 125 SMC

CD214C-T7.5A GDP CD214C-T7.5CA BDP 8.33 9.58 1.0 7.5 100 12.9 116.3 SMC

CD214C-T8.0A GDR CD214C-T8.0CA BDR 8.89 10.2 1.0 8.0 50 13.6 110.3 SMC

CD214C-T8.5A GDT CD214C-T8.5CA BDT 9.44 10.8 1.0 8.5 20 14.4 104.2 SMC

CD214C-T9.0A GDV CD214C-T9.0CA BDV 10.0 11.5 1.0 9.0 10 15.4 97.4 SMC

CD214C-T10A GDX CD214C-T10CA BDX 11.1 12.8 1.0 10 5.0 17.0 88.2 SMC

CD214C-T11A GDZ CD214C-T11CA BDZ 12.2 14.4 1.0 11 5.0 18.2 82.4 SMC

CD214C-T12A GEE CD214C-T12CA BEE 13.3 15.3 1.0 12 5.0 19.9 75.3 SMC

CD214C-T13A GEG CD214C-T13CA BEG 14.4 16.5 1.0 13 5.0 21.5 69.7 SMC

CD214C-T14A GEK CD214C-T14CA BEK 15.6 17.9 1.0 14 5.0 23.2 64.7 SMC

CD214C-T15A GEM CD214C-T15CA BEM 16.7 19.2 1.0 15 5.0 24.4 61.5 SMC

CD214C-T16A GEP CD214C-T16CA BEP 17.8 20.5 1.0 16 5.0 26.0 57.7 SMC

CD214C-T17A GER CD214C-T17CA BER 18.9 21.7 1.0 17 5.0 27.6 53.3 SMC

CD214C-T18A GET CD214C-T18CA BET 20.0 23.3 1.0 18 5.0 29.2 51.4 SMC

CD214C-T20A GEV CD214C-T20CA BEV 22.2 25.5 1.0 20 5.0 32.4 46.3 SMC

CD214C-T22A GEX CD214C-T22CA BEX 24.4 28 1.0 22 5.0 35.5 42.2 SMC

CD214C-T24A GEZ CD214C-T24CA BEZ 26.7 30.7 1.0 24 5.0 38.9 38.6 SMC

CD214C-T26A GFE CD214C-T26CA BFE 28.9 32.2 1.0 26 5.0 42.1 35.6 SMC

CD214C-T28A GFG CD214C-T28CA BFG 31.1 35.8 1.0 28 5.0 45.4 33 SMC

CD214C-T30A GFK CD214C-T30CA BFK 33.3 38.3 1.0 30 5.0 48.4 31 SMC

CD214C-T33A GFM CD214C-T33CA BFM 36.7 42.2 1.0 33 5.0 53.3 28.1 SMC

CD214C-T36A GFP CD214C-T36CA BFP 40 46 1.0 36 5.0 58.1 25.8 SMC

CD214C-T40A GFR CD214C-T40CA BFR 44.4 51.1 1.0 40 5.0 64.5 23.3 SMC

CD214C-T43A GFT CD214C-T43CA BFT 47.8 54.9 1.0 43 5.0 69.4 21.6 SMC

CD214C-T45A GFV CD214C-T45CA BFV 50 57.5 1.0 45 5.0 72.7 20.6 SMC

CD214C-T48A GFX CD214C-T48CA BFX 53.3 61.3 1.0 48 5.0 77.4 19.4 SMC

CD214C-T51A GFZ CD214C-T51CA BFZ 56.7 65.2 1.0 51 5.0 82.4 18.2 SMC

CD214C-T54A GGE CD214C-T54CA BGE 60 69 1.0 54 5.0 87.1 17.2 SMC

CD214C-T58A GGG CD214C-T58CA BGG 64.4 74.6 1.0 58 5.0 93.6 16 SMC

CD214C-T60A GGK CD214C-T60CA BGK 66.7 76.7 1.0 60 5.0 96.8 15.5 SMC

CD214C-T64A GGM CD214C-T64CA BGM 71.1 81.8 1.0 64 5.0 103 14.6 SMC

CD214C-T70A GGP CD214C-T70CA BGP 77.8 89.5 1.0 70 5.0 113 13.3 SMC

CD214C-T75A GGR CD214C-T75CA BGR 83.3 95.8 1.0 75 5.0 121 12.4 SMC

CD214C-T78A GGT CD214C-T78CA BGT 86.7 99.7 1.0 78 5.0 126 11.4 SMC

CD214C-T85A GGV CD214C-T85CA BGV 94.4 108.2 1.0 85 5.0 137 10.4 SMC

CD214C-T90A GGX CD214C-T90CA BGX 100 115.5 1.0 90 5.0 146 10.3 SMC

CD214C-T100A GGZ CD214C-T100CA BGZ 111 128 1.0 100 5.0 162 9.3 SMC

CD214C-T110A GHE CD214C-T110CA BHE 122 140 1.0 110 5.0 177 8.4 SMC

CD214C-T120A GHG CD214C-T120CA BHG 133 153 1.0 120 5.0 193 7.9 SMC

CD214C-T130A GHK CD214C-T130CA BHK 144 165 1.0 130 5.0 209 7.2 SMC

CD214C-T150A GHM CD214C-T150CA BHM 167 192 1.0 150 5.0 243 6.2 SMC

CD214C-T160A GHP CD214C-T160CA BHP 178 205 1.0 160 5.0 259 5.8 SMC

CD214C-T170A GHR CD214C-T170CA BHR 189 217.5 1.0 170 5.0 275 5.5 SMC

Notes:

1. Sufﬁx “A” denotes 5 % tolerance device.

2. Sufﬁx “C” denotes Bidirectional device.

3. Sufﬁx “CA” denotes 5 % tolerance Bidirectional device.

4. 10 % tolerance devices are available but not shown above.

5. For Bidirectional devices having VR= 10 Volts or under, the IRlimit is double.

6. For Unidirectional devices having VFMax = 3.5 V at IF= 35 A, 0.5 Sine Wave of 8.3 ms pulse width.

7. For RoHS compliant devices, add sufﬁx "LF" to part number.

Bourns®Multifuse®Resettable Fuses

Selection Guide

The range of Bourns® Multifuse® Polymer PTC

resettable fuses is designed to limit overcurrents in

telecommunications equipment as well as many

other types of equipment. Adequate overcurrent

protection is needed to allow equipment to comply

with international standards. Overcurrents can be

caused by AC power or lightning flash disturbances

that are induced or conducted to the telephone line.

Our extensive range offers multiple voltage variants

to suit specific application requirements.

Features

• Resettable Circuit Protection

• Designed to Withstand Lightning Surge

• Designed to Withstand AC Power Cross

• Available in Matched Resistance “Bins”

• Agency Approvals - UL, CSA, TÜV

• Popular Footprints and Packaging

•Low Resistance

•Lead Free Options

• Custom Designs Available

• Package Types: SM, R, Disk, Strap

Applications

• CPE and Central Office

• Access Equipment

• Hybrid-Fiber Coax

• Power over Ethernet

MF-R/90 Series – Radial Leaded, 90 Volts

Typical Applications: Hybrid-fiber coax, power passing taps, Power over Ethernet RoHS Compliant

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-R055/90 0.55

90 10

0.45 2.0 10.9

(0.43)

14.0

(0.55)

5.1

(0.201) 1MF-R055/90U 0.55 0.45 2.0 10.3

(0.4)

10.3

(0.4)

MF-R075/90 0.75 0.37 1.65 11.9

(0.47)

15.5

(0.61)

Style 1 Style 2 Style 3

MF-RX/250 Series – Radial Leaded, 60 Volts, 250 Vrms Short Duration Interrupt

Fast Trip, Small Package. Applicable Standards: ITU-T K.20/21/45, GR-1089-CORE Intrabuilding RoHS Compliant

Model

Ihold

(Amps

23 °C)

V max.

(Volts)

I max.

(Amps)

Max. Interrupt

Ratings Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions

[mm/(in)]

Style

Volts

(Vrms)

Amps

(A)

Max.

Nom.

MF-RX012/250 0.12

3.0

250

3 4.0 16.0 6.5

(0.256)

11.0

(0.433)

5.1

(0.201) 2

MF-RX012/250-A 0.12 3.0 3 7.0 16.0 6.5

(0.256)

11.0

(0.433)

MF-RX012/250-C 0.12 3.0 3 5.5 14.0 6.5

(0.256)

11.0

(0.433)

MF-RX012/250-F 0.12 3.0 3 6.0 16.0 6.5

(0.256)

11.0

(0.433)

MF-RX012/250-1 0.12 3.0 3 6.0 16.0 6.5

(0.256)

11.0

(0.433)

MF-RX012/250-2 0.12 3.0 3 8.0 16.0 6.5

(0.256)

11.0

(0.433)

MF-RX012/250-T 0.12 3.0 3 7.0 16.0 6.5

(0.256)

11.0

(0.433)

MF-RX012/250U 0.12 3.0 3 6.0 16.0 6.0

(0.236)

10.0

(0.394)

MF-RX014/250 0.145 3.0 3 3.0 14.0 6.5

(0.256)

11.0

(0.433)

MF-RX014/250-A 0.145 3.0 3 3.0 12.0 6.5

(0.256)

11.0

(0.433)

MF-RX014/250-B 0.145 3.0 3 4.5 14.0 6.5

(0.256)

11.0

(0.433)

MF-RX014/250-T 0.145 3.0 3 5.4 14.0 6.5

(0.256)

11.0

(0.433)

MF-RX014/250U 0.145 3.0 3 3.5 12.0 6.0

(0.236)

10.0

(0.394)

MF-RX018/250 0.18 10.0 10 0.8 4.0 11.0

(0.433)

13.6

(0.535)

MF-RX018/250U 0.18 10.0 10 0.8 4.0 10.4

(0.409)

12.6

(0.496)

RX012

24001K

MF-SM013/250 Series – Surface Mount, 60 Volts, 250 Vrms Short Duration Interrupt

Applicable Standards: ITU-T K.20/21/45, GR-1089-CORE Intrabuilding RoHS Compliant

Model

Ihold

(Amps

23 °C)

V max.

(Volts)

I max.

(Amps)

Max. Interrupt

Ratings Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions

[mm/(in)]

Style

Volts

(Vrms)

Amps

(A)

Max.

Nom.

MF-SM013/250-2

0.13 60 3.0 250 3

6.5

20.0 9.4

(0.370)

3.4

(0.133)

7.4

(0.291) 3

MF-SM013/250-A-2 6.5

MF-SM013/250-B-2 9.0

MF-SM013/250-C-2 7.0

MF-R/600 Series – Radial Leaded, 60 Volts, 600 Vrms Short Duration Interrupt

Applicable Standards: UL60950, GR-1089-CORE, ITU-T K.20/21/45 RoHS Compliant

Model

Ihold

(Amps

23 °C)

V max.

(Volts)

I max.

(Amps)

Max. Interrupt

Ratings Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions

[mm/(in)]

Style

Volts

(Vrms)

Amps

(A)

Max.

Nom.

MF-R015/600 0.15

60 3.0 600 3

6.0 22.0 13.5

(0.531)

12.6

(0.496)

6.0

(0.236) 2

MF-R015/600-A 0.15 7.0 20.0 13.5

(0.531)

MF-R015/600-B 0.15 9.0 22.0 13.5

(0.531)

MF-R015/600-F 0.15 7.0 22.0 13.5

(0.531)

MF-R016/600 0.16 4.0 18.0 16.0

(0.629)

MF-R016/600-A 0.16 4.0 16.0 16.0

(0.629)

MF-R016/600-1 0.16 4.0 17.0 16.0

(0.629)

R015

24001K

Device Options:

•Coated or Uncoated

• Un-Tripped or Pre-Tripped

• Narrow Resistance Bands

• Custom Specified Resistance Bands

• Resistance Sort to 0.5 Ohm Bins

• Disks With and Without Solder Coating

Packaging Options:

•Bulk Packed

•Tape and Reel

• Custom Lead Lengths

Features

•Industry Standard Sizes

• Resettable Circuit Protection

• Agency Approvals - UL, CSA, TÜV.

• Popular Footprints and Packaging

•Low Resistance

•Lead Free Options

• Custom Designs Available

Applications

•Computers and Peripherals

• General Electronics

•Automotive

• Set-top Boxes

• Servers & Routers

Selection of Surface Mount Low Voltage Products

Style 2 Style 3Style 1

Top and Bottom View Side View Top and Bottom View Side ViewSide View End View

MF-SMDF Series – Surface Mount (Lead Free), 10-60 Volts

2018 Package. Typical Application: Power over Ethernet. Applicable Standard: IEEE 802.3AF. RoHS Compliant

MF-SM Series – Surface Mount, 15-33 Volts

3425 Package. Typical Application: Circuit Level Protection.

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-SMDF050 0.50 60 10 0.20 0.95

5.44

(0.214)

4.93

(0.194)

1.09

(0.043)

MF-SMDF150 1.50 15 40 0.07 0.175 0.85

(0.033)

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-SM150 1.50 15 100 0.06 0.25

9.50

(0.374)

3.00

(0.118)

6.71

(0.264) 1

MF-SM150/33 1.50 33 40 0.06 0.23

MF-SM200 2.00 15 100 0.045 0.125

MF-SM250 2.50 15 100 0.024 0.085

Note:

RoHS compliant by adding -99 at the end of the part number, i.e. MF-SM150-2-99.

MF-SM Series – Surface Mount, 6-60 Volts

2920 Package. Typical Application: Circuit Level Protection.

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-SM030 0.30 60 40 0.90 4.80

7.98

(0.314)

3.18

(0.125)

5.44

(0.214) 1

MF-SM050 0.50 60 40 0.35 1.40

MF-SM075 0.75 30 80 0.23 1.00

MF-SM100 1.10 30 80 0.12 0.48

MF-SM100/33 1.10 33 40 0.12 0.41

MF-SM125 1.25 15 100 0.07 0.25

MF-SM260 2.60 6 100 0.025 0.075

MF-MSMF Series – Surface Mount (Lead Free), 6-60 Volts

1812 Package. Typical Application: USB 2.0. RoHS Compliant

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-MSMF010 0.10 60 40 0.70 15.0

4.73

(0.186)

3.41

(0.134)

1.10

(0.043)

MF-MSMF014 0.14 60 40 0.40 6.50

MF-MSMF020 0.20 30 80 0.40 6.00

MF-MSMF030 0.30 30 10 0.30 3.00

MF-MSMF050 0.50 15 100 0.15 1.00

0.85

(0.033)

MF-MSMF075 0.75 13.2 100 0.11 0.45

MF-MSMF075/24 0.75 24 40 0.11 0.45

MF-MSMF110 1.10 6 100 0.04 0.21

MF-MSMF110/16 1.10 16 100 0.04 0.21

MF-MSMF125 1.25 6 100 0.035 0.14

MF-MSMF150 1.50 6 100 0.03 0.12

MF-MSMF160 1.60 8 100 0.035 0.099

MF-MSMF200 2.00 6 100 0.020 0.1

MF-MSMF250/16 2.50 16 100 0.015 0.1

MF-MSMF260 2.60 6 100 0.015 0.08

Note:

RoHS compliant by adding -99 at the end of the part number.

MF-MSMD Series – Surface Mount, 6-60 Volts

1812 Package. Typical Application: USB 2.0.

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-MSMD010 0.10 60 40 0.70 15.000

4.73

(0.186)

3.41

(0.134)

0.81

(0.032)

MF-MSMD014 0.14 60 40 0.40 6.500 0.81

(0.032)

MF-MSMD020 0.20 30 80 0.40 6.000 0.81

(0.032)

MF-MSMD030 0.30 30 10 0.30 3.000 0.81

(0.032)

MF-MSMD050 0.50 15 100 0.15 1.000 0.62

(0.024)

MF-MSMD075 0.75 13.2 100 0.11 0.450 0.62

(0.024)

MF-MSMD110 1.10 6 100 0.04 0.210 0.62

(0.024)

MF-MSMD125 1.25 6 100 0.035 0.140 0.48

(0.019)

MF-MSMD150 1.50 6 100 0.03 0.120 0.48

(0.019)

MF-MSMD160 1.60 8 100 0.035 0.099 0.48

(0.019)

MF-MSMD200 2.00 6 100 0.020 0.100 0.48

(0.019)

MF-MSMD260 2.60 6 100 0.015 0.080 0.48

(0.019)

MF-USMD Series – Surface Mount, 6-30 Volts

1210 Package. Typical Application: USB 2.0.

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-USMD005 0.05 30 10 2.80 50.0

3.43

(0.135)

2.80

(0.110)

0.85

(0.033)

MF-USMD010 0.10 30 10 0.80 15.0 0.85

(0.033)

MF-USMD020 0.20 30 10 0.40 5.00 0.85

(0.033)

MF-USMD035 0.35 6 40 0.20 1.30 0.62

(0.024)

MF-USMD050 0.50 13.2 40 0.18 0.90 0.62

(0.024)

MF-USMD075 0.75 6 40 0.07 0.45 0.62

(0.024)

MF-USMD110 1.10 6 40 0.05 0.21 0.48

(0.019)

075

MF-NSMF Series – Surface Mount (Lead Free), 6-30 Volts

1206 Package. Typical Application: USB On The Go RoHS Compliant

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-NSMF012 0.12 30 10 1.50 6.0

3.4

(0.134)

1.8

(0.071)

1.10

(0.043)

MF-NSMF020 0.20 24 10 0.60 2.60 0.85

(0.033)

MF-NSMF035 0.35 6 100 0.30 1.20 0.85

(0.033)

MF-NSMF050 0.50 13.2 100 0.15 0.70 0.85

(0.033)

MF-NSMF075 0.75 6 100 0.10 0.29 0.70

(0.028)

MF-NSMF110 1.10 6 100 0.06 0.20 0.70

(0.028)

MF-NSMF150 1.50 6 100 0.03 0.13 0.70

(0.028)

Features

• Bulk and Tape and Reel Packaging

• Resettable Circuit Protection

• Agency Approvals - UL, CSA, TÜV.

• Popular Footprints and Packaging

•Low Resistance

•Lead Free Options

• Custom Designs Available

Applications

•Computers and Peripherals

• General Electronics

Selection of Radial Low Voltage Products

B B

Style 1

Style 2

Style 3 Style 4

Style 5

MF-RX/72 Series – Radial Leaded, 72 Volts

Typical Application: Transformer RoHS Compliant

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-RX110/72 1.10

72.0 40

0.15 0.38 10.84

(0.427)

16.8

(0.663)

5.1

(0.021)

MF-RX135/72 1.35 0.12 0.30 12.26

(0.483)

18.3

(0.720)

5.1

(0.021)

MF-RX160/72 1.60 0.09 0.22 13.94

(0.549)

19.9

(0.785)

5.1

(0.021)

MF-RX185/72 1.85 0.08 0.19 15.18

(0.598)

21.2

(0.834)

5.1

(0.021)

MF-RX250/72 2.50 0.05 0.13 17.84

(0.702)

23.8

(0.939)

10.2

(0.402)

MF-RX300/72 3.00 0.04 0.10 20.67

(0.814)

26.7

(1.050)

10.2

(0.402)

MF-RX375/72 3.75 0.03 0.08 23.51

(0.926)

29.6

(1.162)

10.2

(0.402)

RX012

24001K

MF-R Series – Radial Leaded, 16-60 Volts

Typical Application: Transformer

Model

Ihold

(Amps @

23 °C)

V max.

(Volts)

I max.

(Amps)

Initial

Resistance

(Ohms @

23 °C Min.)

1 Hour (R1)

Post-Trip

Resistance

(Ohms @

23 °C Max.)

Dimensions [mm/(in)]

Style

A Max. B Max. C Nom.

MF-R005 0.05 60

7.3 22 8.0

(0.315)

8.3

(0.327)

5.1

(0.021) 4

MF-R010 0.1 60 2.5 7.5 7.4

(0.291)

12.7

(0.500)

5.1

(0.021) 1

MF-R017 0.17 60 2 8 7.4

(0.291)

12.7

(0.500)

5.1

(0.021) 1

MF-R020 0.2 60 1.5 4.4 7.4

(0.291)

12.7

(0.500)

5.1

(0.021) 1

MF-R025 0.25 60 1 3 7.4

(0.291)

12.7

(0.500)

5.1

(0.021) 1

MF-R030 0.3 60 0.76 2.1 7.4

(0.291)

13.4

(0.528)

5.1

(0.021) 1

MF-R040 0.4 60 0.52 1.29 7.4

(0.291)

13.7

(0.539)

5.1

(0.021) 1

MF-R050 0.5 60 0.41 1.17 7.9

(0.311)

13.7

(0.539)

5.1

(0.021) 1

MF-R065 0.65 60 0.27 0.72 9.7

(0.382)

15.2

(0.598)

5.1

(0.021) 1

MF-R075 0.75 60 0.18 0.6 10.4

(0.409)

16.0

(0.630)

5.1

(0.021) 1

MF-R090 0.9 60 0.14 0.47 11.7

(0.461)

16.7

(0.657)

5.1

(0.021) 1

MF-R090-0-9 0.9 30 0.07 0.22 7.4

(0.291)

12.2

(0.480)

5.1

(0.021) 3

MF-R110 1.1 30 0.1 0.27 8.9

(0.350)

14.0

(0.551)

5.1

(0.021) 1

MF-R135 1.35 30 0.065 0.17 8.9

(0.350)

18.9

(0.744)

5.1

(0.021) 1

MF-R160 1.6 30 0.055 0.15 10.2

(0.402)

16.8

(0.661)

5.1

(0.021) 1

MF-R185 1.85 30 0.04 0.11 12.0

(0.472)

18.4

(0.724)

5.1

(0.021) 1

MF-R250 2.5 30 0.025 0.07 12.0

(0.472)

18.3

(0.720)

5.1

(0.021) 2

MF-R250-0-10 2.5 30 0.025 0.07 11.4

(0.449)

18.3

(0.720)

5.1

(0.021) 3

MF-R300 3 30 0.02 0.08 12.0

(0.472)

18.3

(0.720)

5.1

(0.021) 2

MF-R400 4 30 0.01 0.05 14.4

(0.567)

24.8

(0.976)

5.1

(0.021) 2

MF-R500 5 30 0.01 0.05 17.4

(0.685)

24.9

(0.980)

10.2

(0.402) 2

MF-R600 6 30 0.005 0.04 19.3

(0.760)

31.9

(1.256)

10.2

(0.402) 2

MF-R700 7 30 0.005 0.03 22.1

(0.870)

29.8

(1.173)

10.2

(0.402) 2

MF-R800 8 30 0.005 0.03 24.2

(0.953)

32.9

(1.295)

10.2

(0.402) 2

MF-R900 9 30 0.005 0.02 24.2

(0.953)

32.9

(1.295)

10.2

(0.402) 2

MF-R1100 11 16 100 0.003 0.014 24.2

(0.953)

32.9

(1.295)

10.2

(0.402) 2

R005

R010

R250

R600

Note:

RoHS compliant by adding -99 at the end of the part number, i.e. MF-R010-2-99.

LPM – Line Protection Modules

Features

• Precision Thick-film Technology

• Withstands Lightning and AC Power Cross

• Assists Compliance with Telecordia (Bellcore)

GR-1089

• Assists Compliance with ITU-T K.20

• Surface Mount Solution

• Designed to Fail Safely under Fault Conditions

• Optional One-shot Thermal Fuse

• Optional Resettable PTC

• UL 497A Recognized

• Non-flammable

• Standard Offerings

•Custom Designs

• Full Qualification Test Capabilities

• Central Office, Remote and Customer Premises

Equipment Applications Include:

- Analog Line Cards - xDSL Line Cards

- Pairgain - VoIP

- PBX systems - External and

- LCAS Protection Intra-buildings

Custom Designs

In addition to the various standard off-the-shelf

versions available, Bourns offers extensive custom

options. Examples include:

• Variety of Packages, e.g. Vertical and Horizontal

SMD

• Packaging Options, e.g. Trays, Tape and Reel, Bulk

• Additional Resistors, e.g. Ringing Power Resistors

• Additional Components, e.g. Fuses, PTCs,

Overvoltage Protection

• Resistors from 5.6 Ω

• Ratio Matching: Down to 0.3 %, or Less with

Special Limitations

For more information on custom packaging options

please see page 74 and 75 for our full capability. Please

contact your local representative to discuss custom

packaging options.

Model Schematic Dimensions Description

4B08B-511-500

• 2x 50 Ω, 1 %

• 0.5 % matching

• Thermal fuses

4B04B-502-RC

• 1x R Ω, 5 %

• Values 5.6-100 Ω

• Thermal fuse

4B06B-512-RC

• 2x R Ω, 5 %

• Values 5.6-100 Ω

• 0.5 % matching

• Thermal fuses

F1 R1 R2 F2

57812131517

Functional Schematic*

*User must short pins 9 & 10 on the circuit board.

123 111213

F2F1

51.05

(2.010)MAX.

MAX.

3 5 7 8 12 13 15 17

7.62

(.300)

10.16

(.400) 2.54

(.100)

.51

(.020)

5.08

(.200)

3.43 ± .38

(.135 ± .015)

11.30

(.445)

2.03

(.080)

MAX.

0.36

(.014)

12 9 10

2.54 ± .127

(.100 ± .005)

2.54 ± .127

(.100 ± .005)

17.78 ± .254

(.700 ± .010)

25.40 ± 0.50

(1.000 ± .020) 2.03

(.080)

MAX.

0.36

(.014)

MAX.

11.30 ± 0.50

(.450 ± .020)

1 2 3 11 12 13

1.27

(.050)

2.54

(.100)

20.32

(.800)

33.27

(1.310) 3.18

(.125)

MAX.

0.36

(.014)

MAX.

MAX. 1.27

(.050) 2.29

(.090)

MAX.

11.43

(.450)

DIMENSIONS = MILLIMETERS

(INCHES)

Model Schematic Dimensions Description

4A08P-505-RC

• 2x R Ω, 5 %

• Values 5.6-100 Ω

• 1 % matching

4A12P-516-500

• 4x 50 Ω, 1 %

• 0.5 % matching

• Thermal fuses

4B06B-514-500

• 2x 50 Ω, 1 %

• 1.0 % matching

• Resettable

Multifuse® PPTC

4B07B-530-400

• 2x 40 Ω, 2 %

• 0.5 % matching

• Integrated

overvoltage

TISP®

4B06B-540-125/219

• 2x 10 Ω, 5 %

• 2.0 % matching

• Integrated

overvoltage

TISP®

F1A

F2B

F2A

F1B

R1A

R1B

R2B

R2A

1 2 4 8 10 11

22 21 19 15 13 12

12 4

968

1211

6,7

4,5

1,8 13 14

1211

R1 TISP V(B01) TISP V(B02)

312 13

22.35 ± .13

(0.880 ± .005)

12.70 ± .13

(0.500 ± .005)

5.10 ± .13

(0.200 ± .005)

0.51 ± .05

(0.020 ± .002)

2.54 ± .13

(0.100 ± .005)

2.54 ± .13

(0.100 ± .005)

.38

(.015)

MAX.

RADIUS

22.35 ± .05

(0.880 ± .002)

22.50 ± .38

(0.885 ± .015)

4.10 ± .25

(0.160 ± .010)

1.270 ± .127

(0.050 ± .005)

1.270 ± .127

(0.050 ± .005)

1.02 ± .05

(0.040 ± .002)

0.25 ± .05

(0.010 ± .002)

4A12P-516-500

DCODE

21 8 10 11

32.81

(1.292)

3.72

(.146)

MAX.

10.16 ± .13

(.400 ± .005) 5.08 ± .13

(.200 ± .005)

2.54 ± .13

(.100 ± .005)

12.70

(.500)

14.59

(.575)

MAX.

4.07 ± .25

(.160 ± .010)

2.80

(.110)

7.87

(.310)

2.54

(.100)

2 PLCS.

2.54

(.100)

2 PLCS.

5.08

(.200)

3 PLCS.

25.65

(1.010) 4.32

(.170)

MAX.

0.36

(.014)

MAX.

4B06B-514-500

DCODE

MAX.

3.43 ± .38

(.135 ± .015)

12.32

(.485)

2 4 6 8 9

35.56

(1.400)MAX.

20.32

(.800)

APPROXIMATE

TISP® LOCATION

APPROXIMATE

FUSE LOCATIONS

4.57

(.180)

MAX.

1 2 3

4B07B-530-400

DCODE

11 12 13 14

2.54

(.100)

0.36

(.014)

1.91

(.075)

MAX.

1.27

(.050)

3.43 ± .38

(.135 ± .015)

12.70

(.500)

61089B

2 PLCS.

5 PLCS.

33.02

(1.300)MAX.

20.32

(.800)

APPROXIMATE

TISP® LOCATION

APPROXIMATE

FUSE LOCATIONS

4.57

(.180)

MAX.

1 2 3

4B06B-540-V /V

(B01) (B02)

DCODE

11 12 13

2.54

(.100) 0.36

(.014)

0.97

(.038)

1.91

(.075)

MAX.

1.27

(.050)

3.43 ± .38

(.135 ± .015)

11.43

(.450)

2 PLCS.

4 PLCS.

TISP

DIMENSIONS = MILLIMETERS

(INCHES)

Bourns®Telefuse™Telecom Fuses

Selection Guide

Features

• For Use in Telecommunication Circuit Applications

Requiring Low Current Protection with High Surge

Tolerance

• Overcurrent Protection to Telcordia

GR-1089-CORE & UL 1950/60950

• Ideal for Protecting Central Office and Customer

Premises Equipment, including POTS, T1/E1,

ISDN and xDSL circuits

• Model B1250T Allows Overcurrent Compliance

with Telecom Specifications including Telcordia

GR-1089-CORE, UL 60950 and

ITU K.20, K.21 and K.44

• Model B0500T is a Lower Current Version for Use

in Applications where a Faster Opening Time May

be Required

• Bourns® TISP® Thyristor Surge Protector Products

are Recommended for the Overvoltage Section of

the Circuit

• Agency Recognition: File: E198545

Model

Number

Ampere

Rating

(A)

Voltage

Rating

(Vrms)

Typical Cold

Resistance

(ohms)

Peak Surge

Current*

(Amps)

Power Fault

2.2 A, 600 V

Clearing Time

Max. (minutes)

Maximum

Power

Dissipation

(W)

B0500T 0.500 600 0.350 25 2 0.25

B1250T 1.25 600 0.090 100 15 0.40

0.50

1.25

*50 pulses @ 1 kV 10/1000 µs

Body Material: Ceramic with tin plated brass caps

Solder: Lead free

Packaging: 2,000 pcs. per 13 ˝ reel

Product Dimensions

3.05 ± .127

(.120 ± .005)

3.05 ± .127

(.120 ± .005)

2.03 ± .102

(.080 ± .004)

9.65 ± .254

(.38 ± .01)

Recommended Pad Layout

3.81

(.15)

4.06

(.16)

5.08

(.20)

DIMENSIONS = MILLIMETERS

(INCHES)

ESD Components

ESD Overview

Electrostatic Discharge (ESD) is the transfer of

electric charge between bodies of different

electrostatic potential in proximity or through direct

contact. The most common ESD event occurs from

touching a metal doorknob or elevator button after

walking across a carpet. Walking across a carpet in

shoes with insulating soles causes the build up of

static electricity on a person. In effect, the person

becomes a charged capacitor which discharges to the

metal object.

The International Electrotechnical Commission

(IEC) developed a human model ESD test generator

which would allow designers to verify equipment

ESD performance. The IEC defines an ESD test

current impulse as having a rise time of less than 1

ns and decay time of 60 ns to 27 % as shown in the

graph. The IEC ESD standard is IEC 61000-4-2

(2001-04) and it specifies four standard peak test

generator voltages for air discharge and contact

discharge together with a higher user defined level.

Integrated Circuits (ICs) are ESD sensitive devices

and their manufacturers design protection elements

into the IC to increase its robustness. However, these

protection circuits can add cost to the design by

consuming silicon real estate. IC manufacturers

design ICs to withstand a minimum IEC 61000-4-2

2 kV contact discharge voltage to provide protection

during the board manufacturing process. Human

body ESD voltages are nature determined and can be

15 kV or more, which may damage an IC. The

highest standard air discharge voltage of IEC61000-

4-2 is 15 kV to take this into account. Therefore, it is

common practice to protect all “people interactive”

data ports to a 15 kV level to avoid product damage

during installation, use and servicing. Therefore, an

external ESD protector provides the main level of

protection with IC protection elements providing

residual protection.

IEC61000-4-2

Level

Contact Voltage

(kV)

Air Discharge

Voltage

(kV)

Peak Contact

Current

(A)

Contact Current

@ 30 ns

(A)

Contact Current

@ 60 ns

(A)

Level 1 2 2 7.5 4 2

Level 2 4 4 15 8 4

Level 3 6 8 22.5 12 6

Level 4 8 15 30 16 8

Bourns®ChipGuard®ESD Clamp Protection Products

Selection Guide

Bourns® ChipGuard® electrostatic discharge (ESD)

protectors are based on a multilayer zinc oxide

varistor (MLV) technology. The MLV technology

provides excellent electrical performance with a

competitive solution for many ESD requirements.

Features

• Designed to protect sensitive electronic circuits

from the threat of ESD to IEC 61000-4-2 level 4

• 0402 and 0603 type packages

MLA Series – General ESD Protection

IC Power Supplies, Low Frequency Signal & Control Line Protection

Model

Continuous Operating

Voltage

<50 µA

Clamping

Voltage

VC (V)

1 A @ 8/20 µs

Impulse

Current

ITM (Max.)

(A)

@ 8/20 µs

WTM

(Max.)

(J)

10/1000 µs

Capacitance

CP (pF) Typ.

1 Vrms @ 1

MHz

V rms (V) V DC (V)

CG0402MLA-5.5MG 4 5.5 19

20 0.05

300

CG0402MLA-14KG 11 14 38 100

CG0402MLA-18KG 14 18 45 95

CG0603MLA-5.5ME 4 5.5 19

30 0.1

300

CG0603MLA-14KE 11 14 35 160

CG0603MLA-18KE 14 18 40 140

CG0603MLA-26KE 20 26 58 120

MLC Series – High Speed Data and Communication Ports

USB 2.0, IEEE-1394, SCSI, DVI, Antenna and 1 Gb Ethernet

Continuous

Operating Voltage

VDC

(V)

Clamping Voltage

(V)

Off-state

Current

IL Max.

1 Vrms @ 1 MHz

Trigger

Voltage

VDC = max. rating

Capacitance

Coff Max.

pF Max.

Typ. Max. Typ. Max.

CG0603MLC-05E 5 6 20 35

50 150 0.5

CG0603MLC-12E 12 30 50

MLD Series – High Speed Data Applications

USB 2.0, IEEE-1394, 10/100 Mb Ethernet

MLE Series – High Speed Protection Lines

Ethernet, RS232, RS485 ports

Model

Continuous

Operating

Voltage

V DC

(V) Max.

Breakdown

Voltage

VB @ 1 mA

(V) Typ.

Clamping

Voltage

VC @ 1 A

8/20 µs (V)

Max.

Off-state

Current

IL (µA)

Max.

Capacitance

COFF (pF)

Max.

CG0402MLD-12G

12 50 ~ 60 140 1 5

CG0603MLD-12E

Model

Continuous

Operating Voltage Clamping Voltage

VCLAMP (V)

Typ.

Off-state Current

IL (µA)

Max.

Capacitance

CP (pF)

Max.

Vrms

(V)

VDC

(V)

Max. Typ. Max. 8 kV ESD

Contact

15 kV

ESD Air

1 A @

8/20 µs 3.5 V 5.5 V 9 V 12 V 18 V 1 Vrms @ 1 MHz

CG0402MLE-18G

8.5 12 18

100 120 50

0.3 0.4 0.5 1 10

CG0603MLE-18E 40 60 60 50

Notes:

1. All electrical characteristics @ 25 °C unless otherwise stated.

2. Bourns® ChipGuard® electrostatic discharge (ESD) protectors are currently limited to a small range of voltage options. However, the MLV

process allows a wider range to be manufactured. Should a voltage that is not highlighted in the current selection be required, please

inquire with your local representative as Bourns plans to expand the family in the future.

Diode Arrays for ESD Protection

Selection Guide

Bourns offers a family of Diode Arrays for ESD

protection. The ESD protection is implemented

using Zener or TVS diodes in a Chip Scale Package

(CSP) connected directly to the I/O port, or

alternatively using Schottky diodes in a leaded QSOP

package connected in a rail-to-rail configuration.

Depending on the end application, the number of

ports for protection and maximum capacitance levels

can be selected from the table.

Features

• Diode Array

• Stable TFOS Technology

• JEDEC Standard Packages

• ESD Protection: IEC61000-4-2

Applications

• Bidirectional Parallel Port Communications

•Computers & Peripherals

• Instrumentation

2DEA ESD Diode Array – Package Schematic

VSS

VDD VSS

VDD

2DAA ESD Diode Array – Package Schematic

GNDGND

EXT1 EXT4

EXT2 EXT3

2DAD ESD Diode Array – Package Schematic

GND

EXT1 EXT2

EXT4 EXT3

2DAB ESD Diode Array – Package Schematic

EXT5 OR

GND

EXT1 EXT4

EXT2 EXT3

2DAC ESD Diode Array – Package Schematic

16 10

GND

Application I/O Ports Cap Value

(pF)

ESD Withstand

(IEC 61000-4-2)

Minimum

Part Numbers

Tape & Reel Tubes

ESD

Diode Array

4 150

±8 kV Contact

±15 kV Air

2DAA-F6R –

4 or (5 Uni) 150 2DAB-F6R –

12 10.5 2DAC-C16R –

4 15 2DAD-C5R –

20 5 2DEA-2-Q24R 2DEA-2-Q24T

.635

(.025)TYP.

3.81 - 3.99

(.150 - .157)

8.56 - 8.74

(.337 - .344)

PIN 1 .21 - .31

(.008 - .012)

1.35 - 1.75

(.053 - .069)

.10 - .25

(.004 - .010)

0-8 .19 - .25

(.007 - .010)

.41 - 1.27

(.016 - .050)

5.80 - 6.20

(.228 - .244)

DIMENSIONS = MILLIMETERS

(INCHES)

QSOP Package Dimensions

Note:

For Lead Free solution, add “LF” sufﬁx to part number above.

A3 C3

0.432 - 0.559

(0.017 - 0.022)

0.971 - 1.001

(0.038 - 0.039)

0.330 - 0.457

(0.013 - 0.018)

1.285 - 1.375

(0.051 - 0.054)

0.180 - 0.280

(0.007 - 0.011)

0.435

(0.017)

0.435

(0.017)

0.3

(0.012)

0.180 - 0.280

(0.007 - 0.011)

DIA.

0.50

(0.020)

CSP Package – 5 I/O

A2 B2

A3 B3

0.490 - 0.524

(0.019 - 0.021)

0.965 - 1.015

(0.038 - 0.040)

0.414 - 0.424

(0.016 - 0.017)

1.475 - 1.525

(0.058 - 0.060)

0.180 - 0.280

(0.007 - 0.011)

0.50

(0.020)

0.50

(0.020)

0.15 - 0.005

(0.006 - 0.0002)

0.180 - 0.280

(0.007 - 0.011)

DIA.

0.50

(0.020)

CSP Package – 6 I/O

858 ± 40

(33.78 ± 1.57)

225 ± 20

(8.86 ± 0.79)

1997 ± 45

(78.62 ± 1.78)

2177 ± 45

(85.71 ± 1.78)

500

(19.69)

300

(11.81)

500

(19.69)

BUMP A1/PIN 1

INDICATOR

BOURNS

LOGO

45 ± 45

(1.78 ± 1.78)

45 ± 45

(1.78 ± 1.78)

248.5 ± 45

(9.78 ± 1.78)

248.5 ± 45

(9.78 ± 1.78)

428.5 ± 45

(16.87 ± 1.78)

DIA.

CSP Package – 16 I/O

DIMENSIONS = MICRONS

(MILS)

DIMENSIONS = MICRONS

(MILS) DIMENSIONS = MICRONS

(MILS)

Outside Plant Products

Bourns offers a full line of Overvoltage Protectors

based on our Gas Discharge Tube (GDT) and

patented Multi-Stage Protection (MSP®) technology.

Products include 5-Pin Protectors for Central Office

and Building Entrance protection, as well as Station

Protectors and POTS splitters for Network Interface

Devices (NID) for customer premises protection.

Our 241x and 242x series 5-Pin Protectors are highly

reliable and cost effective solutions for Central Office

and Building Entrance protection. We offer a wide

variety of color coded modules with custom

configurations. Both series are available with GDT or

MSP® technology, offering long surge life, high surge

handling capability and low capacitance for

broadband applications.

For Customer Premises, we offer a complete line of

fully modular Network Interface Devices available

from one to one hundred lines. The NIDs are

available in fire retardant, ultraviolet resistant plastic

or zinc coated, rust resistant metal housings. All

NIDs are designed to provide maximum wire

management space and flexibility and are available in

many custom configurations, including our 1740

series protector addition for 75-Ohm Coax cable

protection.

Additionally, we offer a full line of Station Protectors,

ADSL and VDSL splitters with binding post or IDC

terminations and totally integrated protector-

subscriber bridge modules in a snap-in

configuration. Our 23xx series Station Protectors are

offered with GDT, MSP® or Solid State technology.

The 36xx series POTS splitters are designed to meet

all relevant ANSI specifications and all our protector

products and accessories are UL listed and

manufactured to RUS and Telcordia technical

requirements.

Residential Network Interface Devices

Commercial Multipair Network Interface Devices

NID Protector Terminals

NID Enclosures

Bourns®OSP Products – Continued

DigiGuard™ MSP® Broadband Protectors –

Balanced Capacitance (BC) versions available for VDSL

5-Pin Broadband Protectors

DSL Splitters – ADSL (left) and VDSL (right)

Well Protectors

Standard Station Protectors

Outside Plant – Signaling Systems Surge Protectors

Bourns® 1669 protectors are designed to protect

field-mounted 4-20 mA transmitters. The 1669 series

features a sealed stainless steel pipe for easy

connection to a field transmitter 1/2 inch NPT port.

A railmounted 1820-28-Ax is typically used to

protect the Digital Carrier System equipment at the

opposite end of the loop.

1669 Series – Transient Protector Selection Guide

Model

Max.

Signal

Voltage

DC Clamping

Voltage

Capacitance

1 MHz, Max. Series

Resistance

per Line

(Ω)

Inductance

per Line,

Max.

(µH)

Leakage

V DC, Max.

(µA)

Impulse Clamping

1 kA (L+L)–G Surge Life

L/L

(V)

L/G

(V)

L/L

(pF)

L/G

(pF)

10/1000

µs

L/L (V)

500 V/µs

L/G

(V)

20 kA

8/20 µs

(times)

1 kA

10/100 µs

(times)

1669-01

1669-05 30 36

250 1200 40

22 1 1 50

750

20 1000

1669-02

1669-06 36 2000 2000 70

1669-06 Product Dimensions 1669-02 Product Dimensions

100.00

(3.94)

300

(11.81)TYP.

3/4-14 NPT,

2 PLCS.

115.00

(4.53)

300

(11.81)TYP.

3/4-14 NPT

DIMENSIONS = MILLIMETERS

(INCHES)

1800 Series – Signal and Dataline Protector Selection Guide

Mounting

Detail

Typical

App.

Interface Operating

Characteristics

Protective Characteristics

Peak Clamping Voltages Max. DC

Current

(mA)

Typical

Capacitance

Series

Resistance

Each Line

(input to output)

(Ohms)

Peak Signal

Voltage

Max.

Data

Rate

(MHz)

@ 5 kA, 8 x 20 µs

rate of rise

@ 1 kA, 8 x 20 µs

rate of rise

L/L (V) L/G (V) L/L (V) L/G (V) L/L (V) L/G (V) L/L (pF) L/G (pF)

1810-10-xx

RS-422

20 10 10 50 25 42 21 220 1200 2200 10

1820-10-xx 10 10 4 25 25 21 21 220 3300 3300 10

1811-10-xx 20 10 50 60 30 52 26 350 45 45 10

1821-10-xx 10 10 50 30 30 26 26 350 65 65 10

1810-15-xx RS-232 30 15 8 70 35 56 28 180 750 1500 15

1820-15-xx RS-485 15 15 3 35 35 28 28 180 2300 2300 15

1811-15-xx

4-20 mA

30 15 45 80 40 64 32 300 45 45 15

1821-15-xx 15 15 45 40 40 64 32 300 65 65 15

1810-28-xx 56 28 9 110 55 90 45 150 600 1100 22

1820-28-xx 28 28 4 55 55 45 45 150 1800 1800 22

1811-28-xx 56 28 40 120 60 45 45 250 45 45 22

1821-28-xx 28 28 40 60 60 45 45 250 65 65 22

1810-50-xx 100 50 10 178 89 156 89 100 30 5000 51

1820-50-xx 50 50 4 89 89 45 45 100 800 800 51

Surge Life:

> 100 operations 200 Amps, 10 x 1000 µsec

> 10 operations 10 kA, 8 x 20 µsec

1800 Series Signal/Data Attenuation at Maximum Data Rate: 3 db with 600 Ω Termination

Operating Temperature:

1669 Series -40 to +100 °C

1800 Series -40 to + 60 °C

1820-28-A1 Product Dimensions 1820-28-A3 Product Dimensions

(TS-32/EN50035)

DIN-1 RAIL

E3/L3 GROUNDING LINK

GROUNDING SCREW

FEED-THROUGH (E3/L3)

GND

EQPT

E2 E3 E1

LINE

L1 L3 L2

(49.02)

(28.96)

1.91

(48.51)

1.14

1.93

.74

(18.80)

3.28

(83.31)

(TS-35/EN50022)

DIN-3 RAIL

MOUNTING/GROUNDING SCREW

1.79

(45.47)

ALIGNMENT 8-32UNF-2A

.375

(9.53)

.125

(3.18) .093

(2.36)

.70

(17.80)

DIMENSIONS = MILLIMETERS

(INCHES)

Other Related Products & Capabilities

Bourns offers a wide range of Transformers suitable

for use in Telecom, LAN and Ethernet applications.

These devices are available in a range of surface

mount and through-hole packages as well as some

low profile devices for PCMCIA applications. A

summary of part numbers by application is below.

PT60001 – LAN 10Base-T, 10Base-5, 10Base-2

1 2 4 5 7 8

16 15 13 12 10 9

PT60006 – LAN 100Base-TX

1:1

PT60003 – LAN 10Base-T/100Base-TX PCMCIA

1TX

1:1

PT60007 – LAN 10Base-T/100Base-TX QUAD

1:1

PT60005 – LAN 10Base-T/100Base-TX

1:1

PT60010 – LAN 100Base-TX QUAD

PT61005 – LAN 10Base-T Filter Interface

1 37

9 32

11 27

19 22

15 29

PT60011 – LAN 10-100Base-TX QUAD

RD+ 1 40 RX+

39 RX-

RD- 2

37 TX+

TD+ 4

36 TX-

TD- 5

38 CT1

CT1 3

35 TX-

TD- 6

34 TX+

TD+ 7

33 CT2

RD- 9 32 RX-

31 RX+

RD+ 10

RD+ 11 30 RX+

29 RX-

RD- 12

CT3 13

TD- 16

TD+ 17

CT4 18

RD- 19 22 RX-

23 CT4

24 TX+

25 TX-

28 CT3

21 RX+

RD+ 20

CT2 8

TD+ 14

TD- 15 26 TX-

27 TX+

1:1

TRANSMIT

RECIEVE

LOW PASS

FILTER

LOW PASS

FILTER

LOW PASS

FILTER

LOW PASS

FILTER

PT60014 – LAN 10Base-T/100Base-TX PCMCIA

TRANSMIT

RECEIVE

1:1

PT61007 – LAN 10Base-T/100Base-TX QUAD

TD1 + 1 40 TX1 +

38 TX1 -

TD1 - 3

37 RX1 +

RD1 + 4

36 RX1 -

RD1- 5

35 TX2 +

TD2 + 6

33 TX2 -

TD2 - 8

34 TCT2

RD2 + 9 32 RX2 +

31 RX2 -

RD2 - 10

TD3 + 11 30 TX3 +

28 TX3 -

TD3 - 13

RD3 + 14

RD3 - 15

TD4 + 16

TD4 - 18

TCT4 17

RD4 + 19 22 RX4 +

24 TCT4

23 TX4 -

25 TX4 +

26 RX3 -

27 RX3 +

29 TCT3

21 RX4 -

RD4 - 20

TCT3 12

TCT2 7

39 TCT1

TCT1 2

1:1

PT61003 – LAN 10Base-T/100Base-TX High Speed

1:1

PT61010 – LAN 10Base-T

TRANSMIT

RECEIVE

Pri Sec

613

PT61004 – LAN 10Base-T Filter Interface

100 Ω

1:1

100 Ω

1:1

TRANSMIT

RECIEVE

LOW PASS

FILTER

LOW PASS

FILTER

LOW PASS

FILTER

LOW PASS

FILTER

PT66001 – ISDN S-Interface Transformer Module

III

core 1

n = 2/2:1/1

core 2

n = 2/2:1/1

III

VII

VIII

core 3

n = 1:1:1:1

PT66002 – T1 Transformer

Sec

III (CT)

Pri Sec

III

Pri

PT66004 – ISDN S-Interface Transformer

Pri

III

Sec

PT66005 – T1/CEPT/ISDN-PRI Transformer

Pri

1:1 Sec

PT534-1 (1:1) – ADSL Line Transformer

Line

Chip

SM-LP-5001 – Series SM Line Matching Transformer

PT66003 – T1/CEPT Transformer

Pri

III

Sec

SM76299 – SHDSL Line Transformer

SM535-1 – ADSL Line Transformer

Chip

Line

1 : 1.95

Bourns®Microelectronic Modules Packaging Solutions

Device Mounting Technology

Surface Mount Technology

Surface mounting is still the most common and

economical approach for many applications. Bourns®

Microelectronic Module products offer the latest in

surface mount technology:

• Chip sizes to 0201

•Inert reflow

• SOIC, PLCC, TSOP, QFP to 0.012 ˝ (0.3 mm)

• Lead free solder capability

•CSP, odd form components

•Passive component test

• BGA: 0.5 mm pitch, underfill

Chip & Wire/COB (Chip on Board)

This proven technology provides an intermediate

level of miniaturization, the advantages of in-process

test and repair and is designed to withstand harsh

environments such as automotive applications.

Bourns® Microelectronic Module products offer the

latest in chip & wire technology:

• Gold & Aluminum Wire Bonding – High speed,

automated, ball/wedge, wedge/wedge, ribbon

• Gold Wire Bonding – 20-50 µm (0.8 to 2 mil)

wire to 100 µm (4 mil) pitch

• Aluminum Wedge Bonding – 125-380 µm

(5 to 15 mil) wire for high current/power

applications

• Die Attachment – Epoxy or Eutectic, 5 µm accuracy,

glob top, dam & fill

Flip Chip Mounting

This process provides the ultimate opportunity for

package miniaturization and minimization of

conductor lengths and size reduction in high speed,

high frequency applications.

Bourns® Microelectronic Module products offer a

choice of flip chip approaches:

Anisotropic Adhesive Attachment

(Z-axis conductive epoxy)

• Ideal for PCB and flex circuits

• High I/O

•Tight pitch

• Cost-effective flip chip solution

• Utilizes off-the-shelf wire bondable ICs

Any Substrate

Gold Bump

Anisotropic Conductive Epoxy

Conductive Particles

Ceramic Substrate

Gold Bump (stud bump)

Underﬁll (optional)

Thermal-Sonic Bonding (Gold-to-Gold Interconnect)

• Ideal for high frequency applications and MEMs to

ceramic substrates

• I/O limited to ~32 or less

• Underfill optional

•Low temp process

•Lead free

Stud Bump bonding

• Ideal for high I/O flip chip to ceramic substrate

• Mid-process replacement of faulty chips

• Underfill required

• Proven technology with reliability data

• Utilizes off-the-shelf wire bondable ICs

Ceramic Substrate

Gold Bump (stud bump)

Conductive Adhesive

Underﬁll

Any Substrate

Gold Bump (stud bump)

Conductive Adhesive

Underﬁll (optional)

Solder Mounting

• Standard flip chip technology

• Solder bumped devices

• Optional underfill

• Z-axis control for ultimate strength

• High volume cost-effective solution

Full Process for Stud Bump Bonding

IC IC

Press

Au Bumps

Substrate

Underﬁll

Bump

Formation Leveling

Height Transfer of

Conductive

Adhesive

Mounting

& Curing Inspection Sealing

& Curing

Substrate

IC IC IC

Substrate

• SIP (Single Inline Packaging) – 0.050 ˝, 0.100 ˝ and

1.8 mm

• DIP (Dual Inline Packaging) – 0.100 ˝

• BGA (Ball Grid Array)

• QFP (Quad Flat Pack)

• J-Leads in Dual or Quad configuration –

0.050 ˝, 0.075 ˝ and 0.100 ˝

• Mini-DIL

• TO-cans

•Butterfly

• Hermetic Seal

Choice of Package Interconnects

• CSP (Chip Scale Packaging) – smallest package for

surface mounting

• MCM (Multichip modules) – smallest package for

multichip hybrid

Bourns®Switch Power DC/DC Converters

Bourns Switch Power has brought innovative

product solutions and ideas to the power conversion

market since 1995. Our emphasis on high

performance converters has given us a broad and

expanding selection of power solutions. Our focus

on the communications market gives us the

advantage of experience when developing high

reliability products. Our technological innovation

has produced patents covering all aspects of DC-DC

Converter development: from controller IC design

through power train layout, resulting in better

performance, higher density and higher reliability

products.

Non-Isolated Converters

Bourns® Switch Power's Non-Isolated Converters

provide the low voltages needed to support core

logic, ASICs, microcontrollers and microprocessors.

These high-efficiency converters provide improved

regulation and superior dynamic response. In many

cases this is thanks to Bourns Switch Power’s

patented V2TM architecture. High power density in

both SIP and surface mount module packages ensure

compatibility with most size requirements.

Input Voltages: 3.3 V, 5 V, 12 V

Output Currents: 2 A to 32 A

Output Voltages: 0.8 V to 5.0 V

Typical Applications for Point of Load

DC/DC Converters:

• Low voltage, high density systems with

Intermediate Bus Architectures (IBA)

• Workstations, servers, and desktop computers

• Distributed power architectures

• Telecommunications equipment

• Latest generation ICs (DSP, FPGA, ASIC) and

microprocessor-powered applications

• Data processing equipment

• Broadband, networking, optical and

communications systems

SLIC Power

The SLIC Power series of products provides high-

performance power and low cost to Ringing SLIC

users. Rather than spending time designing and

testing specialized power circuits, the designer can

simply select the appropriate SLIC Power module.

Whether comparing cost, space or design time, the

SLIC Power modules can meet or exceed other

options.

Input

Voltage

VBAT1/2

-72 V / -24 V -63 V / -24 V -60 V / -24 V

5.0 V SPT5504C SPT5504CL SPT5504Q

12 V SPT5204Q SPT5204QL —

48 Volt Power

Our M20W power module is an industrial

temperature range, dual-output device. The system

designer obtains flexibility in choosing 5 V and 3.3 V

components, based on the ability of the module to

supply either voltage over a wide power range to the

load. The output voltages are tightly and

independently regulated, thus eliminating the

common problem of cross regulation errors between

the outputs. The module is designed with Switch

Power’s resonant primary and synchronous

secondary topology for enhanced reliability and high

efficiency, allowing high-temperature operation.

Custom Power

Bourns can design and produce Custom Power

solutions for your specific application. The standard

fixed product is available in output voltages not

specified in this catalog. Please contact application

support for more information.

Which Protection Technology is Right for the Equipment?

There are several individual technologies within each

of the core protection types listed in Table 1. No

single protection technology offers an ideal solution

for all requirements. Each technology has different

strengths and weaknesses, and only by

understanding their relative merits can protection be

optimized for a given installation. A quick review of

Table 2 demonstrates that no single ideal solution

exists for all locations within the telephone network

so cascaded protection is often deployed.

The Basics – Overvoltage and Overcurrent

Protection devices fall into two key types, overvoltage

and overcurrent. Overvoltage devices (see Figure 1)

divert surge current (such as lightning), while most

overcurrent devices (see Figures 2a-2c) increase in

resistance to limit the surge current flowing from

longer duration surge currents (50/60 Hz power

fault). There are two types of voltage limiting

protectors: switching devices (GDT and Thyristor)

that crowbar the line and clamping devices (MOV

and TVS). The inset waveforms of Figure 1

emphasize that switching devices results in lower

stress levels than clamping devices (shaded area) for

protected equipment during their operation.

Functionally, all voltage protectors reset after the

surge, while current protectors may or may not,

based on their technology. For example, PTC

thermistors are resettable; fuses are non-resettable as

shown in Table 3.

Protection Type Action Connection

Overcurrent Limit peak current Series (or parallel

for primary)

Overvoltage Limit peak voltage Parallel

Overcurrent and

Overvoltage

Coordinate voltage

and current

protection

Combination

Table 1. Protection falls into three basic types

Overvoltage

Speed Accuracy Current Rating

GDT Fair Fair Very high

Thyristor Fair Good High

MOV Fair Poor High

TVS Very fast Good Very low

Overcurrent

Speed Accuracy Current Rating

Polymer PTC

Thermistor Fair Good Low

Ceramic PTC

Thyristor Slow Good Low

Fuse Very slow Fair Medium/High

Heat Coil Very slow Poor Low

Thermal

Switch Very slow Poor High

Table 2. Summary of technology characteristics

Good protection design necessitates an

understanding of the performance trade-offs and

benefits of each device type, as well as the

terminology used in their specifications. Adequate

grounding and bonding, to reduce potential

differences and provide a low impedance current

path is a prerequisite for coordinated system

protection (GR-1089-CORE, Section 9).

Figure 1. Overvoltage protection provides a shunt path for surges

Overvoltage limiting - clamping and switching

Source

Impedance

Overvoltage

Protection

Protected Load

Surge Current

Overvoltage

Threshold Voltage

Source and load voltages

Clamping

Overvoltage

Protection

Switching

Overvoltage

Protection

Surge

ONLY

Overcurrent limiting - interrupting

Source

Impedance Overcurrent

Protection

Protected Load

Surge Current

Surge

Overcurrent

Interrupting

DO NOT

ENTER

Interrupting

Overcurrent limiting - reducing

Source

Impedance Overcurrent

Protection

Protected Load

Surge Current

Surge

Overcurrent

Reducing

REDUCED

CURRENT

AHEAD

Reducing

Figure 2a-2c. Overcurrent protection isolates the equipment by

presenting a high impedance

Overcurrent limiting - diverting

Source

Impedance

Protected Load

Surge Current

Surge

Overcurrent

Diverting

ONLY

Overcurrent

Protection

Diverting

What Happens After a Surge or if the Device Fails?

In addition to preventing a surge from destroying

equipment, resettable devices return the equipment

to pre-event operation, eliminating maintenance cost

and maximizing communications service. In

addition, lightning typically consists of multiple

strikes. It is, therefore, essential to consider

subsequent surges. Because lightning and power

cross standards are not intended to represent the

maximum surge amplitudes in the field, an

understanding of what happens under extreme

conditions is equally important.

Action Connection Examples

Voltage switching Shunt GDT, Thyristor

Voltage clamping Shunt MOV, TVS

Overvoltage

Overcurrent

Action Connection Examples

Resettable Series

PTC thermistor

– Ceramic

– Polymer

Non-resettable Series Fuse

Non-resettable Shunt or series Heat coil

Non-resettable Series LFR (Line Feed

Resistor)

Non-resettable Across voltage

limiter

Fail-short device for

thermal overload

Table 3. The basic classes of protection devices

A shunt device failing open circuit effectively offers

no follow-on protection, although under normal

conditions the telephone line will operate. If the

device fails to a short circuit, the line is out of

service, but further damage is prevented. In addition,

other issues such as exposed areas prone to heavy

surge events or remote installations where

maintenance access is difficult may strongly

influence selection of the most suitable protection

technology (see Table 4).

Reliability Tip

Complying with standards does not guarantee

ﬁeld reliability.

Overvoltage

Suitable for Primary (P)

or Secondary (S)1,2

Normal Operation After Excess Stress3

After Operation Still Protecting? Line Operating?

GDT P or S

Reset to Normal

Yes/No No/Yes

GDT + Thermal Switch P Yes No

Thyristor P or S Yes No

Thyristor + Thermal Switch P Yes No

MOV S No Yes

TVS S Yes No

Overcurrent

Normal

Operation After Excess Stress3

After

Operation

Still

Protecting?

Line

Operating?

PTC Thermistor Reset to

Normal

Yes No

Fuse Line

Disconnected

Heat Coil Line Shorted

or Open

Thermal Switch Line Shorted

LFR Both Lines

Disconnected

1Primary protection applications typically require

speciﬁc fail-short protection.

2Secondary protection requires a fused line (USA).

3The failure mode depends on the extent of the excess stress.

Comments made for a typical condition that does not fuse

leads.

Table 4. The status after the protection has operated can be a

signiﬁcant maintenance/quality of service issue

Speed and Accuracy are Major Control Factors in

Determining Equipment Stress Levels

The behavior of each technology during fast surge

events can have a substantial effect on maximum stress

as summarized in Table 5a and 5b. In addition to device

tolerance, each device requires a finite time to operate,

during which the equipment is still subjected to the

unlimited surge waveform. Before operation, some

technologies allow significant overshoot above the

‘operating’ level. The worst-case effects determine the

stress seen by the equipment and not just the nominal

“protection” voltage or current (see Figure 3).

Overvoltage protection technologies may be

summarized as follows:

• GDTs offer the best AC power and high surge

current capability. For high data rate systems

(>30 Mbs), the low capacitance makes GDTs the

preferred choice.

• Thyristors provide better impulse protection, but at a

lower current.

• MOVs are low cost components.

• TVS offers better performance in low dissipation

applications.

Type Performance

Class

Technology

Voltage

Limiting

Speed

Voltage

Precision

Impulse

Current

Capability

Low

Capacitance

Switching

Gas Discharge Tube

Thyristor

Clamping

Metal-Oxide Varistor

TVS

BESTBEST

Table 5a. No overvoltage technology offers an ideal solution for all applications

Overvoltage Limiters

Type Performance

Class

Technology

Fast

Operation

Resistance

Stability

Low

Operating

Current

Low

Series

Resistance

Reducing

Polymer PTC Thermistor

Ceramic PTC Thermistor

Interrupting

Fuse

Line Feed Resistor

Diverting

Heat Coil

Thermal Switch

Overcurrent Limiters

BEST

Table 5b. No overcurrent technology offers an ideal solution for all applications

Overcurrent protection technologies may be

summarized as follows:

• PTC thermistors provide self-resetting protection.

• Fuses provide good overload capability and low

resistance.

• Heat coils protect against lower level ‘sneak

currents’.

• LFRs provide the most fundamental level of

protection, combined with the precision resistance

values needed for balanced lines and are often

combined with other devices.

Voltage

Voltage impulse

Difference between

typical and impulse

voltage

Maximum Overshoot

Maximum AC

protection voltage

Typical AC protection

voltage

Device operating delay - Voltage effect

depends on impulse rate of rise

Technology Selection - Overvoltage Protectors

Voltage limiting devices reduce voltages that exceed

the protector threshold voltage level. The two basic

types of surge protective devices are clamping and

switching, Figure 8. Clamping type protectors have a

continuous voltage-current characteristic (MOV and

TVS), while the voltage-current characteristic of the

switching type protector is discontinuous (GDT and

Thyristor). A series or shunt combination of

clamping and switching type devices may provide a

better solution than a single technology. Utilize the

decision trees in Figures 4-7 to aid in the election of a

suitable circuit protection solution. Comparative

performance indicators and individual device

descriptions beneath each decision tree allow

designers to evaluate the relative merits for each

individual or combination of technologies. The lower

density and increased exposure of rural sites suggests

that heavier surges can be expected for these

Reliability Tip

Check worst-case protection values, not just

nominal ﬁgures.

applications (Figure 4), while the cost and type of the

protected equipment has an influence on the

selection of secondary protection (Figure 5, 6, & 7).

During the operation of overvoltage protectors, surge

currents can be very high and PCB tracks and system

grounding regimes must be properly dimensioned.

It is important that protectors do not interfere with

normal operation. Although traditional telecom

systems typically run at –48 V battery voltage plus

100 V rms ringing voltage (i.e. approximately 200 V

peak), designers should consider worst-case battery

voltage, device temperature and power induction

Figure 3. Systems must survive more than the nominal protection

voltage

voltages when specifying minimum protection

voltage. Some digital services operate at much higher

span voltages, requiring further consideration for

equipment designed for broadband applications (see

Table 2). The capacitance of overvoltage protectors

connected across these lines is important - especially

for digital connections such as ISDN and xDSL.

Matched and stable devices are necessary to avoid

introducing imbalance in the system.

Lower impulse voltage

Lower capacitance Lower capacitance

Long impulse life Long impulse life

Lower capacitance

Lower impulse voltage

Lowest

Impulse

Voltage

Highest Intrinsic Impulse Capability

CLAMP?

Uncontrolled

environment?

GDTThyristor

Thyristor GDT

No YesHybrid?

YesNo

MOV TVS

Thyristor

Diode

GDT +

TVS

GDT +

MOV

GDT +

MOV

GDT +

TVS

TVS MOV

Solution?

Hybrid?

CLAMP?

Note: The overvoltage protector may require the addition of AC overcurrent protection.

Figure 4. Primary overvoltage technology selection

Figure 5. Secondary overvoltage protection depends on the type of

component to be protected

What component

type is being

protected?

Passive Active/

Semiconductor

See Figure 6 See Figure 7

Reliability Tip

Ensure that PCB tracks and wiring are dimensioned

for surge currents.

Smaller

Lower cost

Smaller

Lower cost

Component type?

Inductive

Solution?

ComponentProtection Protection

Thyristor GDT Increased

rating

Solution?

Passive

ComponentProtection Protection

Thyristor GDT Increased

rating

ComponentProtection Protection

Thyristor GDT Increased

rating

Solution?

ComponentProtection Protection

Thyristor TVS Increased

rating

Solution?

Resistor Capacitor

Class?

Inductor Transformer

Note: The overvoltage protector may require the addition of AC

overcurrent protection.

Figure 6. Secondary protection of passive components

Datasheet Tip

When protecting digital lines, check the tolerance

and variation of protection capacitance (i.e. voltage

dependance), not just nominal values.

Gas Discharge Tubes (GDTs)

GDTs apply a short circuit under

surge conditions, returning to a high

impedance state after the surge.

These robust devices with negligible

capacitance are attractive for

protecting digital lines. GDTs are

able to handle significant currents,

but their internal design can

significantly affect their operating

life under large surges (see Figure 9).

The sparkover voltage of GDTs

increases at high rates of voltage rise

(dv/dt). The level of increase

depends on the actual rate of rise

and the nominal DC sparkover

voltage. For example at 100 V/µs, the

impulse sparkover voltage of a 75 V GDT increases

to approx. 250 V and the impulse sparkover of a

350 V GDT increases to approximately 600 V.

Their ability to handle very high surge currents for

hundreds of microseconds and high AC for many

seconds matches the primary protection needs of

exposed and remote sites. During prolonged AC

events, GDTs can develop very high temperatures,

and should be combined with a thermal overload

switch that mechanically shorts the line (Switch-

Grade Fail-Short mechanism).

AC Capability AC Capability AC Capability

Protection level

Lower cost

Protection level

Component type?

Xpoint Switch

LCAS, SSR

Thyristor Diode

Bridge

Solution?

ThyristorThyristorThyristorHybrid TVS

Solution?

Active/

Semiconductor

SLIC PSU

MOV

Xpoint Switch: Cross-point Switch

LCAS: Line Card Access Switch

PSU: Power Supply Unit

SSR: Solid State Relay

SLIC: Subscribe Line Interface Circuit

Note: The overvoltage protector may require the addition of AC

overcurrent protection, such as a LFM, PTC thermistor or fuse.

Figure 7. Secondary protection of active components

Standards Tip

UL Recognized GDTs are

now available,

requiring no BUG.

Datasheet Tip

GDTs are available with

Switch-Grade Fail-Short

Device.

Bourns® Products

Gas Discharge Tubes

Bourns offers the subminiature 3-electrode

Mini-TRIGARD®GDT and the 2-electrode Mini-GDT.

Combining small size with the industry’s best

impulse life, these products are ideal for high-density

primary applications.

Current AmA

Voltage - V

GDT

0 100 200 300 400 500

100

1GDT

GDT

Thyristor

Switching

Clamping

MOV

TVS

Thyristor

Figure 8. Overvoltage protectors feature very different V/I characteristics

Figure 9. GDT behavior may deteriorate under real-world ﬁeld conditions

DC Sparkover Voltage @ 100 V/s

Number of 500 A, 10/1000 impulses

Bourns

Supplier A

Supplier B

Supplier C

Supplier D

0 50 100 150 200 250 300 350 400

450

400

350

300

250

200

150

100

GDT DC Sparkover Voltage Variation over Impulse Life

(350 V GDTs)

Certain GDTs can suffer

from venting or gas loss.

To ensure protection

under these circum-

stances, an air Back Up

Gap (BUG) has been

used. BUGs themselves

can be subject to

moisture ingress or

contamination, reducing

their operating voltage, and leading to nuisance

tripping. BUGs are also more sensitive to fast rising

voltage surges, causing the BUG to operate instead of

the GDT. All Bourns® GDTs are now UL approved

for use without the need of a BUG, eliminating extra

cost and improving reliability (see Figure 10).

Reliability

GDT UL

Recognized

GDT +

BUG GDT

GDT Selected

No Yes

GDTs approved to UL497 optional test program for use without

a back-up device are no longer required to use a BUG

Figure 10. Traditional GDT venting has required back-up protection

Surge

Current

Power

Cross

dv/dt

Sensitivity

di/dt

Sensitivity Typical Application

Several kA

for 100 µs

Several amps

for seconds

Poor None Primary and secondary

protection

Exposed sites

Sensitive equipment needs

additional secondary

protection

Particularly suited to high

speed digital lines

GDT protection capabilities

Thyristor-Based Devices

Thyristor-based devices initially clamp the line

voltage, then switch to a low-voltage “On” state. After

the surge, when the current drops below the

“holding current,” the protector returns to its original

high impedance state. The main benefits of thyristor

protectors are lower voltage overshoot and an ability

to handle moderate currents without a wear-out

mechanism. The disadvantages of thyristor

protectors are higher capacitance, which is a

limitation in high-speed digital applications, and less

tolerance of excessive current. Thyristor protectors

can act either as secondary protection in conjunction

with GDTs, or as primary protection for more

controlled environments/ lower surge amplitudes.

For protection in both voltage polarities, either a

power diode or second thyristor may be integrated in

inverse parallel, creating

versatile protection

functions that may be

used singly or in various

combinations. The

clamping voltage level of

fixed voltage thyristors is

set during the

manufacturing process.

Gated thyristors have their protective level set by the

voltage applied to the gate terminal.

Surge

Current

Power

Cross

dv/dt

Sensitivity

di/dt

Sensitivity Typical Application

Several 100 A

for 100 µs

Several amps

for seconds

Good Poor Primary or secondary

protection

Urban and some exposed

sites

Can protect sensitive

equipment

Thyristor protection capabilities

Bourns® Products

TISP® Thyristor Surge Protectors

The TISP®family of thyristor-based devices includes

an extensive range of single and multiple

conﬁgurations in unidirectional and bidirectional

formats, with ﬁxed or gated operation.

Metal Oxide Varistors (MOVs)

A Metal Oxide Varistor (variable resistor) is a voltage

dependent resistor whose current predominantly

increases exponentially with increasing voltage. In

clamping surges, the MOV absorbs a substantial

amount of the surge energy. With a high thermal

capacity, MOVs have high energy and current

capability in a relatively small size. MOVs are

extremely fast and low cost, but have high capacitance,

a high, current-dependant clamping voltage, and are

susceptible to wear. Typical MOV applications include

general-purpose AC protection or low-cost analog

telecom equipment such as basic telephones. When

combined with a GDT, the speed of the MOV enables

it to clamp the initial overshoot while the GDT begins

to operate. Once the GDT fires, it limits the energy in

the MOV, reducing the size of MOV required. Devices

are available which integrate an MOV and GDT in a

single package to simplify assembly and save space.

Surge

Current

Power

Cross

dv/dt

Sensitivity

Typical

Application

Several kA

for 100 µs

Dissipation

limited

Good Secondary

protection

Can protect

non-sensitive

equipment

MOV protection capabilities

Surge

Current

Power

Cross

dv/dt

Sensitivity

Typical

Application

Low Poor None Secondary

protection

Can protect

sensitive

equipment

TVS protection capabilities

Datasheet Tip

When selecting operating voltage, remember that

MOV residual voltage increases considerably at

higher current.

Transient Voltage Suppressors

Transient Voltage Suppressor (TVS) diodes are

sometimes called Zeners, Avalanche or Breakdown

Diodes, and operate by rapidly moving from high

impedance to a non-linear resistance characteristic

that clamps surge voltages. TVS diodes provide a

fast-acting and well-controlled clamping voltage

which is much more precise than in an MOV, but

they exhibit high capacitance and low energy

capability, restricting the maximum surge current.

Typically used for low power applications, their well-

controlled voltage clamp enables the selection of

protection voltages closer to the system voltage,

providing tighter protection.

Technology Selection - Overcurrent Protectors

Current limiting devices (See Figures 11, 12) provide

a slow response, and are primarily aimed at

protection from surges lasting hundreds of

milliseconds or more, including power induction or

contact with AC power. By combining a fixed

resistor in series with a resettable protector, an

optimum balance of nominal resistance and

operating time is obtained. The inherent resistance

of certain overcurrent protectors can also be useful

in coordination between primary and secondary

overvoltage protection.

Lower cost

High current impulse

Lower on resistance

Lower fire risk

Lower cost

Primary overvoltage

technology?

Mechanical

compression

Solder

melt

Solution?

Mechanical

switch*

Insulation

melt

Solution?

AC Overcurrent

Thyristor GDT

Solder

melt

*Switch-Grade Fail-Short

Note: Protection against sneak currents requires the additional

components

Figure 11. Selection of fail-short technology for Primary

overvoltage protection

Lower signal loss

Better line balance

Use with

ADSL?

Sneak current

protection needed? No

Yes

Heat coil Polymer Ceramic Straight-

through

Resettable

PTC thermistor

type?

Figure 12. Sneak current technology selection

Reliability Tip

Hybrid devices incorporating resistors

can improve performance.

Positive Temperature Coefﬁcient (PTC) Thermistors

Heat generated by current flowing in a PTC

thermistor causes a step function increase in

resistance towards an

open circuit, gradually

returning close to its

original value once the

current drops below a

threshold value. The

stability of resistance

value after surges over

time is a key issue for preserving line balance. PTCs

are commonly referred to as resettable fuses, and

since low-level current faults are very common,

automatically resettable protection can be

particularly important. There are two types of PTC

thermistors based on different underlying materials:

Polymer and Ceramic. Generally the device cross-

sectional area determines the surge current

capability, and the device thickness determines the

surge voltage capability.

Polymer PTC devices typically have a lower resistance

than ceramic and are stable with respect to voltage

and temperature. After experiencing a fault condition,

a change in initial resistance may occur. (Resistance is

measured one hour after the fault condition is

removed and the resulting change in resistance

compared to initial resistance is termed the R1 jump.)

Reliability Tip

The stability of PTC thermistor resistance after

operation can be critical for line balance.

Nominal

Ohms

Resistance Stability

(with V and

Temperature)

Change After

Surge

Typical

Application

Polymer PTC

Thermistor 0.01 - 20 Good 10 - 20 % CPE Equipment,

e.g. Modem

Ceramic PTC

Thermistor

10 - 50 R decreases with

temperature and

under impulse

Small Balanced line, e.g.

Line Card SLIC

Table 6. The two types of PTC thermistors have important differences

In balanced systems with a PTC thermistor in each

conductor, resistance change may degrade line

balance. Including additional series resistance such

as an LFR can reduce the effect of the R1 jump. In

addition, some PTC thermistors are available in

resistance bands to minimize R1 effects. Polymer

types are also commonly used singly to protect CPE

equipment.

Ceramic PTC devices do not exhibit an R1 jump,

and their higher resistance avoids the need for

installing an additional LFR. While this reduces

component count, the resistance does vary with

applied voltage.

Since this change can be substantial (e.g. a decrease

by a factor of about 3 at 1 kV), it is essential that any

secondary overvoltage protection be correctly rated

to handle the resulting surge current, which can be

three times larger than predicted by the nominal

resistance of the ceramic PTC. In a typical line card

application, line balance is critical.

Datasheet Tip

PTC thermistor and resistor hybrids can improve

speed and line balance.

Bourns® Products

Multifuse® Resettable Fuses

Bourns offers an extensive range of polymer PTC devices

in the Multifuse®resettable fuse product family,

providing resettable overcurrent protection solutions.

Fuses

A fuse heats up during surges, and once the

temperature of the element exceeds its melting point,

the normal low resistance is converted to an open

circuit. The low resistance of fuses is attractive for

xDSL applications, but their operation is relatively

imprecise and time-dependant. Once operated, they

do not reset. Fuses also require additional resistance

for primary coordination (see Application section).

Since overvoltage protection usually consists of

establishing a low impedance path across the

equipment input, overvoltage protection itself will

cause high currents to flow. Although relatively slow

Safety Tip

Fuses offer a simple way to remove long-term faults,

and potentially dangerous heat generation,

but I-t coordination with other protection is vital.

acting, fuses can play a major safety role in removing

longer term faults that would damage protection

circuitry, thus reducing the size and cost of other

protection elements. It is important to consider the I-

t performance of the selected fuse, since even

multiples of the rated current may not cause a fuse to

rupture except after a significant delay. Coordination

of this fuse behavior with the I-t performance of

other protection is critical to ensuring that there is

no combination of current-level and duration for

which the protection is ineffective. By including

structures intended to rupture under excess current

conditions or separate components, it is also possible

to produce hybrid fusible resistors.

Bourns® Products

Telefuse™ Telecom Fuses

Bourns has recently launched the B1250T/B0500T

range of SMT power fault protection fuses.

Heat Coils

Heat coils are thermally activated mechanical devices

connected in series with the line being protected,

which divert current to ground. A series coil

operates a parallel shunt contact, typically by melting

a solder joint that is restraining a spring-loaded

contact. When a current generates enough heat to

melt the joint, the spring mechanically forces two

contacts together, short-circuiting the line. Heat coils

are ideal to protect against “sneak currents” that are

too small to be caught by other methods. Their high

inductance makes them unsuitable for digital lines. It

is also possible to construct current interrupting heat

coils which open the circuit as a result of

overcurrent.

Bourns® Products

LPM Line Protection Modules

Bourns offers Line Feed Resistors combining matched

resistor pairs plus thermal link fuses.

Line Feed Resistors

A Line Feed Resistor (LFR) is the most fundamental

form of current protection, normally fabricated as a

thick-film device on a ceramic substrate. With the

ability to withstand high voltage impulses without

breaking down, AC current interruption occurs when

the high temperature developed by the resistor causes

mechanical expansion stresses that result in the

ceramic breaking open.

Low current power induction may not break the LFR

open, creating long-term surface temperatures of more

than 300 °C. To avoid heat damage to the PCB and

adjacent components, maximum surface temperature

can be limited to about 250 °C by incorporating a

series thermal fuse link on the LFR. The link consists

of a solder alloy that melts when high temperatures

occur for periods of 10 seconds or more.

Along with the high precision needed for balanced

lines, LFRs have significant flexibility to integrate

additional resistors, multiple devices, or even different

protection technology within a single component. One

possible limitation is the need to dimension the LFR

to handle the resistive dissipation under surge

conditions. Along with combining multiple

noninductive thick-film resistors on a single substrate

to achieve matching to <1 %, a resistor can be

combined with other devices to optimize their

interaction with the overall protection design.

For example, a simple resistor is not ideal for

protecting a wire, but combining a low value resistor

with another overcurrent protector provides closer

protection and less dissipation than either device can

offer alone. Both functions can be integrated onto a

single thick-film component using fusible elements,

PTC thermistors, or thermal fuses. Similarly, more

complex hybrids are available, adding surface mount

components such as thyristor protectors, to produce

coordinated sub-systems.

Thermal Switches

These switches are thermally activated, non-resetting

mechanical devices mounted on a voltage-limiting

device (normally a GDT). There are three common

activation technologies: melting plastic insulator,

melting solder pellet or a disconnect device.

Melting occurs as a result of the temperature rise of

the voltage-limiting device’s thermal overload

condition when exposed to a continuous current

flow. When the switch operates, it shorts out the

voltage-limiting device, typically to ground,

conducting the surge current previously flowing

through the voltage limiting device.

A plastic-melting based switch consists of a spring

with a plastic insulator that separates the spring

contact from the metallic conductors of the voltage

limiting device. When the plastic melts, the spring

contacts both conductors and shorts out the voltage

limiting device.

A solder–pellet-melting based switch consists of a

spring mechanism that separates the line

conductor(s) from the ground conductor by a solder

pellet. In the event of a thermal overload condition,

the solder pellet melts and allows the spring contacts

to short the line and ground terminals of the voltage-

limiting device.

A “Snap Action” switch typically uses a spring

assembly that is held in the open position by a

soldered standoff and will short out the voltage

limiting device when its switching temperature is

reached. When the soldered connection melts, the

switch is released and shorts out the line and ground

terminals of the voltage limited (Bourns US Patent

#6,327,129).

4B06B-540-125/219

0205

Figure 15. Photo of hybrid

Modes of Overvoltage Protection

Insufficient protection reduces reliability, while

excessive protection wastes money, making it vital to

match the required protection level to the equipment

or component being protected. One important aspect

is the “modes” of protection.

Figure 13 illustrates that, for two wire systems, a

single mode of operation protects against transverse

(differential/metallic) voltages, but for three wire

systems, the ground terminal provides opportunities

to protect against both transverse and longitudinal

(common-mode) surges. This offers a trade-off for

items such as modems, where the provision of

adequate insulation to ground for longitudinal

voltages enables simple single mode/single device

protection to be used.

Ground-referenced SLICs and LCAS ICs, however,

require three-mode protection. Figure 14 illustrates

how devices may be combined and coordinated to

offer three-mode protection. The three-terminal

GDT offers two modes of robust primary protection,

while two PTC devices provide decoupling and

coordination. The bidirectional thyristor provides the

third mode of precise secondary voltage protection.

Technology Selection - Integrated Solutions

As emphasized earlier, no single technology provides

ideal protection for all requirements. Combining

more than one technology can often provide an

attractive practical solution. Clearly the convenience

PC PB

Pb Pc

Protection

Modes

Protection

Modes

Protection

Modes

Protection

Modes

Three Protectors

Three Modes

Wye (Y) Connected

Three Protectors

Three Modes

Delta (∆) Connected

Two Protectors

Two Modes

One Protector

One Mode

Figure 13. Matching the modes of protection to the application optimizes protection and cost

GDT1

Th1

Wire to Ground

GDT

Inter-Wire

Thyristor

Figure 14. The modes of protection may be split between primary

and secondary devices,with PTC thermistors ensuring

coordination

of a single component/module combining multiple

devices saves space and assembly cost while

simplifying the design task (see Figure 15). In

addition, some integrated modules provide

performance and capabilities that cannot be achieved

with separate discrete devices. In the next sections,

multi-stage overvoltage protectors and a broader

combination of overvoltage and overcurrent

protection integrated line protection modules are

presented.

Multi-Stage Protectors

When considering overvoltage protection (see Figure

4), combining a GDT with either a TVS or MOV

clamping device can reduce the impulse voltage

stress seen by downstream components. Although

TVS devices are attractive, they often introduce too

much capacitance. Typically, a GDT/MOV

combination offers a better solution. Figure 16

illustrates the different behavior of GDTs,

GDT/MOV hybrids and thyristor overvoltage

protection for both 100 V/µs and 1000 V/µs impulse

waveforms. The GDT/MOV hybrid provides more

consistent protection than a simple GDT, irrespective

of the environment.

The low capacitance of the GDT/MOV hybrid also

provides valuable characteristics for high frequency

applications, enabling the protection of a wide range

of copper-pair lines from POTS to VDSL and CAT5

100 Mb/s networks. All Bourns® GDT and

GDT/MOV hybrid families are UL Recognized for

use without a BUG, making them simple to use and

saving valuable space.

In addition to its superior clamping of fast rising

transients, the MOV of the GDT/MOV assembly

provides the function of a back up device without the

well-known negative side effects of BUGs. Figure 11

demonstrates that a thermally operated current

diverter is useful to protect the GDT from excessive

heat dissipation under prolonged power cross

conditions.

The best performance and lowest fire risk are

provided by the thermal switch or switch-grade fail-

short mechanism. GDT/MOV/fail-short overvoltage

protectors effectively replace three components,

providing maximum surge current capability from

the GDT, low transient clamping characteristics and

back up function from the MOV, and maximum

safety from the switch-grade fail-short device.

Integrated Line Protection Modules

Integrating multiple protection elements on a single

FR4 or ceramic substrate SIP reduces the PCB area

used and increases the number of lines that can be

fitted to each line card. Figure 17 outlines the key

technologies available for such integrated assemblies

Figure 16. Each protection technology behaves differently under

Impulse conditions

Impulse and Ramp % Voltage Increase

Maximum System Voltage

Maximum System Voltage – V

(GDT – Minimum Sparkover)

(Thyristor VDRM)

8 mm GDT

8 mm GDT Hybrid

Thyristor

Normalized Impulse or Ramp Protection Voltage Increase – %

1000 V/µs

100 V/µs

1000

500

400

300

200

150

100

700

100 150 200 250 300 350 400 450 500

Bourns® Products

GDT Gas Discharge Tubes

The Bourns® MSP®Multi-Stage Protector assembly

combines MOV responsiveness with GDT robustness.

Combined with our patented switch-grade fail-short

device, it provides the optimum broadband network

primary protection solution.

Figure 17. Multiple technologies may be integrated into a single,

space-saving Line Protection Module

SIP LPM

SMT Fuse 2-point

3-point “V”

3-point “Y”

3-point Gated

3-point “Delta”

Line 1 circuit

Overcurrent

Protection

Overcurrent

Protection

Overvoltage

Protection

Resistor

Array

Resistor Array

Overvoltage Protection

LFR

LFR +

Thermal Link Fuse

PTC Thermistor

LFR +

PTC Thermistor

Line n circuit

SLICs powered from

negative supplies need

only a uni-directional

3-point “V”. Three-

mode “Y” or “Delta” 3-

point protection is

used where protection

is needed both to

ground and interwire.

Figure 18 illustrates

an LCAS protection

module, with ±125 V

Tip protection, and

±219 V Ring protection in a 3-point “V”

configuration, complete with LFRs and thermal

link fuses.

As with discrete device solutions, gated thyristor

protectors can be used to significantly reduce voltage

stress for sensitive SLICs and current stress on

downstream protection circuits. Once again the

thermal coupling between a PTC thermistor and a

heating element is beneficial. Heat from the thyristor

speeds up thermistor tripping under power

induction conditions. Further, the thyristor long-

term temperature rise is constrained to the trip

temperature of the thermistor, thereby limiting the

maximum protection voltage under low AC

conditions.

Each module can provide multiple circuits,

protecting 2, 4 or 6 lines with a single module. The

use of UL recognized components greatly eases both

consistency of performance and UL recognition of

the module. System-level design is simplified,

because individual component variations are handled

during the module design, enabling the module to be

considered as a network specified to withstand

defined stress levels at the input, while passing

known stresses to downstream components.

and introduces one new form of overcurrent

protection. Thermal fuse link uses the heat from the

LFR under continuous power induction to desolder a

series link, which interrupts the induced current,

avoiding thermal damage to the module, the line

card or surrounding components. They are not

practical as discrete devices because they use special

structures built into the substrate. These integrated

modules tend to be customized for each application,

rather than off-the-shelf components.

Although PTC thermistors may be used alone, series

connection with an LFR reduces peak currents and

thereby allows smaller cross-section PTC thermistors

to be used. The thermal coupling of an integrated

module also ensures that the LFR heating further

increases the rate of PTC thermistor temperature rise

during AC faults causing faster low current tripping.

The series LFR resistance will reduce the impulse

current increase of ceramic thermistors and reduce

the relative trip resistance change of polymer types.

It is worth noting that 10 mm SMT micro fuses are

now available (e.g. Bourns® Telefuse™ fuse) with 600

V ratings to meet GR-1089-CORE, and UL 60950

safety requirements, and, dependent on the

application, these may be fitted in either one or both

signal lines. LFR technology can also be used to

fabricate precision high voltage resistors on the same

substrate for non-protection use, such as power ring

feed resistors and bridges for off-hook detection,

giving further cost and PCB space savings.

As seen in “Modes of overvoltage protection”, it is

important to match the protection topology

(typically thyristor based) to the equipment being

protected, with simple single-mode, 2-point

protection being suitable for Tip to Ring protection

applications such as modem coupling capacitor

protection. The two mode bidirectional 3-point “V”

is a common configuration, protecting components

connected between Tip or Ring and Ground, while

R1F1

Th1 Th2

R1 = 10

R2 = 10

F1 = Thermal Link Fuse

F2 = Thermal Link Fuse

Th1 = TISP125H3BJ

Th2 = TISP219H3BJ

4B06B-540-125/219 LPM

for LCAS Protection

Figure 18. An example of an LPM

integrated LCAS

protection module

Bourns® Products

LPM Line Protection Modules

Bourns offers a variety of Line Protection Module (LPM)

products, including custom options.

Telecommunication Standards

and Recommendations Summary

M J Maytum, August 2004, rev 9

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

1.1 Test Circuits and Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

1.2 Hazard indicators and wiring simulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

2 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

2.1 Telcordia GR-1089-CORE, Issue 3, October 2002,

Electromagnetic Compatibility and Electrical Safety -

Generic Criteria for Network Telecommunications Equipment . . . . . . . . . . . . . . . . . . . . .97

2.2 Telcordia GR–3108–CORE, Issue 1 (in development),

Generic Requirements for Network Equipment in the Outside Plant (OSP)

Telcordia Technologies Generic Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

2.3 TIA-968-A-2002 with Addendums TIA-968-A-1 2003 and TIA-968-A-2 2004,

Telecommunications Telephone Terminal Equipment:

Technical Requirements for Connection of Terminal Equipment

to the Telephone Network (Formally known as “FCC Part 68”) . . . . . . . . . . . . . . . . . . . .98

2.4 UL 60950-1, April 2003,

Safety for Information Technology Equipment – Safety –

Part 1: General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

2.5 UL 60950-21, November 2003,

Safety for Information Technology Equipment – Safety –

Part 21: Remote Power Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

2.6 UL 1459, 1999, Standard for Telephone Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

2.7 UL 2444, (in development), Network Equipment Standard . . . . . . . . . . . . . . . . . . . . . . .99

2.8 ITU-T Recommendation K.20 (07-2003),

Resistibility of telecommunication equipment installed

in a telecommunications centre to overvoltages and overcurrents . . . . . . . . . . . . . . . . . . .99

2.9 ITU-T Recommendation K.21 (07-2003),

Resistibility of telecommunication equipment installed

in customer premises to overvoltages and overcurrents . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

2.10 ITU-T Recommendation K.44 (07-2003),

Resistibility tests for telecommunication equipment

exposed to overvoltages and overcurrents – Basic Recommendation . . . . . . . . . . . . . . . . .99

2.11 ITU-T Recommendation K.45 (07-2003),

Resistibility of telecommunication equipment installed

in the access and trunk networks to overvoltages and overcurrents . . . . . . . . . . . . . . . .103

2.12 ITU-T Recommendation K.50 (02/2000),

Safe limits of operating voltages and currents

for telecommunication systems powered over the network . . . . . . . . . . . . . . . . . . . . . . . .103

2.13 ITU-T Recommendation K.51 (02/2000),

Safety criteria for telecommunication equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

2.14 IEC 61000-4-5 (2001-04), Ed. 1.1,

Electromagnetic compatibility (EMC)- Part 4-5:

Testing and measurement techniques - Surge immunity test . . . . . . . . . . . . . . . . . . . . . .103

2.15 ETSI EN 300 386-1, (2003-05),

Electromagnetic compatibility and Radio spectrum Matters (ERM);

Telecommunication network equipment;

ElectroMagnetic Compatibility (EMC) requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

2.16 ETSI EN 300 386-2, (1997-12),

Electromagnetic compatibility and Radio spectrum Matters (ERM);

Telecommunication network equipment;

ElectroMagnetic Compatibility (EMC) requirements; Part 2:

Product family standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

3 Surge Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

3.1 GR-1361, Issue 2, September 1998,

Generic Requirements for Gas Tube Protector Units (GTPUS) . . . . . . . . . . . . . . . . . . . .103

3.2 GR-974-CORE, Issue 3,

Generic Requirements for Telecommunications Line Protector Units (TLPUs) . . . . . . .104

3.3 UL 497, Edition 7 (April 2001),

Standard for Protectors for Paired Conductor Communications Circuits . . . . . . . . . . . .104

3.4 UL 497A, Edition 3 (March 2001)

Standard for Secondary Protectors for Communications Circuits . . . . . . . . . . . . . . . . . .104

3.5 UL 497B, Edition 4 (June 2004)

Standard for Protectors for Data Communication and Fire Alarm Circuits . . . . . . . . .104

3.6 UL 497C Edition 2 (August 2001)

Standard for Protectors for Coaxial Communications Circuits . . . . . . . . . . . . . . . . . . . .104

3.7 IEEE Std C62.36-2000,

IEEE Standard Test Methods for Surge Protectors

Used in Low-Voltage Data, Communications, and Signalling Circuits . . . . . . . . . . . . . .104

3.8 IEEE Std C62.64-1997,

IEEE Standard Specifications for Surge Protectors

Used in Low-Voltage Data, Communications, and Signalling Circuits . . . . . . . . . . . . . .104

3.9 ITU-T Recommendation K.28 (03/1993),

Characteristics of semiconductor arrester assemblies

for the protection of telecommunications installations . . . . . . . . . . . . . . . . . . . . . . . . . . .104

3.10 IEC 61643-21 (2000-09),

Low voltage surge protective devices -

Part 21: Surge protective devices connected to telecommunications

and signalling networks - Performance requirements and testing methods . . . . . . . . . .104

3.11 ATIS T1.337-2004,

Requirements for Maximum Voltage, Current, and Power Levels

in Network-Powered Transport Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

3.12 ATIS T1.338-2004,

Electrical Coordination of Primary and Secondary

Surge Protective Devices for Use in Telecommunications Circuits . . . . . . . . . . . . . . . . . .105

4 Surge Protective Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

4.1 REA Bulletin 345-83,

Specification for Gas Tube Surge Arrestor, RUS PE-80 . . . . . . . . . . . . . . . . . . . . . . . . . . .105

4.2 ITU-T Recommendation K.12 (02/2000),

Characteristics of gas discharge tubes

for the protection of telecommunications installations . . . . . . . . . . . . . . . . . . . . . . . . . . .105

4.3 IEEE Std C62.3x

Series of Test Specifications For Surge Protective Components . . . . . . . . . . . . . . . . . . . . .105

4.3.1 IEEE Std C62.31-1987 (under revision),

IEEE Standard Test Specifications For Gas-Tube Surge-protective Devices . . . .105

4.3.2 IEEE Std C62.32-2004

IEEE standard test specifications for low-voltage air gap

surge-protective devices (excluding valve and expulsion type devices) . . . . . . . .105

4.3.3 IEEE Std C62.33-1982

IEEE standard test specifications for varistor surge-protective devices . . . . . . . .105

4.3.4 IEEE Std C62.35-1987

IEEE standard test specifications for avalanche junction

semiconductor surge protective devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

4.3.5 IEEE Std C62.37-1996

IEEE standard test specification for thyristor diode surge protective devices . . .105

4.4 IEC 61643-3x1

Series of test specifications for low-voltage surge protective components . . . . . . . . . .105

4.4.1 IEC 61643-311 (2001-10), Ed. 1.0,

Components for low voltage surge protective devices -

Part 311: Specification for gas discharge tubes (GDT) . . . . . . . . . . . . . . . . . . . . .105

4.4.2 IEC 61643-321 (2001-12) Ed. 1.0,

Components for low voltage surge protective devices -

Part 321: Specifications for avalanche breakdown diode (ABD) . . . . . . . . . . . .105

4.4.3 IEC 61643-331 (2003-05) Ed. 1.0,

Components for low voltage surge protective devices -

Part 331: Specification for metal oxide varistors (MOV) . . . . . . . . . . . . . . . . . . .105

4.4.4 IEC 61643-341 (2001-11) Ed. 1.0,

Components for low voltage surge protective devices -

Part 341: Specification for thyristor surge suppressors (TSS) . . . . . . . . . . . . . . .105

1.1 Test Circuits and Levels

Lightning and power fault events can induce

longitudinal surges in the telecommunication line

and Figure 1 shows how longitudinal (port to

ground) surge testing is done. Depending on the test

intent additional items such as primary protection,

wiring simulation and the decoupling of other ports

may be added in these test circuits.

Asynchronous operation of upstream protection

grounds one line conductor and converts a

longitudinal surge into a transverse surge. Figure 2

shows the transverse (metallic or differential) surge

test circuit. The number of transverse test

configurations is the same as the number of wires. A

twisted-pair should have two tests, one applied to the

Ring conductor and the other applied to the Tip

conductor. However, if the circuit is symmetrical,

only one proving test needs be done.

When the ground has high resistance or is not

connected, the incoming surge enters the equipment

on one port and exits at another port – a port-to-

port surge. Figure 3 shows how port-to-port testing

is done.

The surge threats are higher for

the exposed external cables than

cables just internal to the

building. Figure 4 shows port

testing for shielded and

unshielded internal cables. GR-

1089-CORE excludes internal

port testing, if the shielded cable

is grounded at both ends.

The maximum test levels applied

are typically in three areas; basic withstand, a higher

(enhanced) level withstand for adverse environments

and an excessive level to investigate possible safety

hazards. Step testing is done at levels up to the

maximum specified to verify there are no blind spots

in the equipment performance. The equipment must

be functional after withstand testing (criterion A or

“first level”) and shall not create hazard from safety

testing (criterion B or “second level”).

1 Introduction

This document summarises the common

telecommunication protection device and equipment

standards. To minimise service loss and user safety

hazards, service providers and regulators mandate

that equipment and devices comply with specific

standards or recommendations. This section

summarises telecommunications component and

port surge tests in the North American documents

from Telcordia (GR), Underwriters Laboratories

(UL), Institute of Electrical and Electronics

Engineers (IEEE) and Telecommunications Industry

Association (TIA). International documents covered

come from the International Telecommunication

Union Telecommunication Standardization Sector

(ITU-T) and the International Electrotechnical

Commission (IEC). As international trade, travel and

communications increase, international standards

enable products to be sold and work worldwide.

Standards are constantly evolving, so it is important

to verify the material here against the latest copies of

the relevant documents. The European documents

covered are either EN versions of IEC standards or

from the European Telecommunications Standards

Institute (ETSI).

Test

Generator

EUT

Decoupling

Element

Coupling

Element

RInternal/

external

port

Internal

port

External

port

Powering/

auxilary

equipment or

terminations

Primary

test protector

when required

EEE

Return

Output

Powering/

auxilary

equipment or

terminations

Powering/

auxilary

equipment or

terminations

Figure 1. Longitudinal surge test circuit

Figure 2. Transverse surge test circuit

Test

Generator

EUT

Decoupling

Element

Coupling

Element

RInternal/

external

port

External

port

Primary

test protector

when required

Return

Output

Powering/

auxilary

equipment or

terminations

Powering/

auxilary

equipment or

terminations

Unused

ports

Test

Generator

EUT

Decoupling

Element

Coupling

Element

RInternal/

external

port

External

port

External

port

Primary

test protector

when required

Appropriate primary

test protector

when required

EEE

Return

Output

Powering/

auxilary

equipment or

terminations

Powering/

auxilary

equipment or

terminations

Powering/

auxilary

equipment or

terminations

Figure 3. Port to port surge test circuit

Test

Generator

EUT

Decoupling

Element

Coupling

Element

RInternal/

external

port

Internal

port

Powering/

auxilary

equipment or

terminations

Return

Output

Powering/

auxilary

equipment or

terminations

Unused

ports

Test

Generator

EUT

Internal

ports

Return

Output

20 m shielded cable

Internal line unshielded cable test circuit Internal line shielded cable test circuit

Figure 4. Internal cable port test circuits

1.2 Hazard indicators and wiring simulators

The condition of cheesecloth wrapped around the

item under test checks for potential user hazards.

After safety testing, hazards are indicated by

cheesecloth that is charred burnt or perforated (GR-

1089-CORE only). Wiring simulations in a test circuit

check that the equipment feed cable will overheated.

The equipment must interrupt or reduce the AC fault

current before the simulator operates or is judged to

overheat. Because of different cabling practices and

simulation options, there are more wiring simulator

options than standards that use them. Figure 5 shows

a selection of simulators; graphical, mathematical, fuse

(shown at 80 % of typical) and single wire, together

with their referenced standards.

2 Equipment

2.1 Telcordia GR-1089-CORE, Issue 3, October 2002

Electromagnetic Compatibility and Electrical Safety -

Generic Criteria for Network Telecommunications

Equipment

AC and lightning surge test circuits and performance

levels for the external and internal line ports of

network equipment. External port feed cable

MDQ 1 6/10 Fuse '1089/UL 1459

MDL 2 Fuse '1089/UL 60950

100A2s, 1.3 A DC UL 60950

Fig. 4-5 GR-1089-CORE

26 AWG GR-1089-CORE

Fig. 59.2 UL 1459

Current – A rms

100

0.1

0.01 0.1 1

Duration – s

10 100 1000

Figure 5. Wiring simulators

overheating and primary-equipment coordination

tests are included. Test summaries for twisted-pair

cables are shown in tables one through three. Further

material on GR-1089-CORE, Issue 3 is in the article

“The New GR-1089-CORE” Compliance Engineering,

2003 Annual Reference Guide: pp 103-113.

Table 1. GR-1089-CORE impulse tests

GR-1089-

CORE

Table #

Test #

Min. Peak

Open Circuit

Conductor

Voltage (V)

Min. Peak

Short-Circuit

Conductor

Current (A)

Waveshape Repetitions

Each Polarity

Test

Connection

Test

Type Port Primary

4-23

1 600 100 <10/>1000 25

Longitudinal

& Transverse

First Level

Withstand

External

Removed

2 1000 100 <10/>360 25

311000 100 <10/>1000 25

4 2500 500 <2/>10210 Longitudinal

551000 25 <10/>360 5 Longitudinal

up to 12 pairs

4-341 400-2000 0-100 <10/>1000 10 Longitudinal

& Transverse Coordination

4-431 5000 500 <2/>1021 Longitudinal Second Level

Safety

4-56

1 800 100 <2/>1021 Transverse First Level

Withstand

Intra-

building

2 1500 100 <2/>1021 Longitudinal

Notes:

1. Test 3 replaces tests 1 and 2.

2. A 1.2/50, 8/20 combination waveshape of the same peak current (but increased duration) may be used as an alternative.

3. For equipment with voltage limiters, tests must also be done at a voltage level just below the limiter threshold.

4. Becomes an objective January 2005 and a requirement in January 2006. Besides GR-1089-CORE, Issue 3, further information on this test

is contained in “Electrical Coordination of Primary and Secondary Surge Protective Devices for Use in Telecommunications Circuits”

T1.333-2004 and “The New GR-1089-CORE” Compliance Engineering, 2003 Annual Reference Guide: pp 103-113.

5. Not applicable for single port equipment.

6. Not applied to ports with shielded cables that have the shield grounded at both ends.

GR-1089-

CORE

Table #1

Test #

Open-Circuit

Conductor

Voltage

(V rms)

Short-Circuit

Conductor

Current

(A rms)

Duration

(s) Applications Test

Connection

Test

Type Port Primary

4-6

1250 0.33 900 1

Longitudinal

& Transverse

First Level

Withstand External

Removed22100 0.17 900 1

32200, 400 & 600 1 @ 600 V rms 1 60

4 1000 1 1 60

Longitudinal

Fitted

5Inductively coup led test circuit

1089 Fig. 4-4 560

Removed

6 600 0.5 30 1

Longitudinal

& Transverse

7 440 2.2 2 5

8 600 3 1.1 5

9 1000 5 0.4 5 Longitudinal Fitted

4-72, 3

4-82, 4

1 120, 277 25 900 1

Longitudinal

& Transverse Second Level

Safety External Removed

2 600 60 5 1

3 600 7 5 1

4 100-600 2.2 @ 600 V rms 900 1

5Inductively coup led test circuit

1089 Fig. 4-4 900 1 Longitudinal

Table 2. GR-1089-CORE AC power fault tests

Notes:

1. AC sources are 50 Hz or 60 Hz, sinusoidal.

2. For equipment with a voltage limiter or current limiter, tests must also be done at a level just below the limiter threshold.

3. For non-customer-premise equipment the wiring simulation used for all tests may be GR-1089-CORE Figure 4-5, an MDL 2 fuse or an

MDQ 1 6/10 fuse.

4. For customer-premise equipment the wiring simulation used for all tests may be GR-1089-CORE Figure 4-5, an MDL 2 fuse, an MDQ 1 6/10

fuse or a 26 AWG wire, if such wire or coarser is speciﬁed for installation.

Table 3. GR-1089-CORE AC current-limiter and fusing tests

Notes:

1. AC sources are 50 Hz or 60 Hz, sinusoidal.

2. For current-limiting protector tests of non-customer-premise equipment, the wiring simulation used may be GR-1089-CORE Figure 4-5,

and MDL fuse or an MDQ 1 6/10 fuse.

3. For fusing coordination tests of network equipment to be located at the customer premises, the wiring simulation used may be

GR-1089-CORE Figure 4-5, and MDL 2 fuse or a 26 AWG wire, if such wire or coarser is speciﬁed for installation.

4. Only for network equipment to be located at the customer premises.

5. For second-level intra-building port testing of customer premise equipment, the wiring simulation used may be GR-1089-CORE Figure 4-5,

an MDL 2 fuse or a MDQ 1 6/10 fuse.

Table 4. TIA-968-A-2002 Lightning surge tests

Notes:

1. Equipment may fail, but not in a Ring-Tip short-circuit mode.

2. Equipment must be operational after these withstand tests.

3. These values are for both Ring and Tip outputs grounded. T1-968-A quotes for only one conductor grounded, giving 37.5 A and 5/320.

GR-1089-

CORE

Clause #

Open-Circuit

Conductor

Voltage

(V rms)

Short-Circuit

Conductor Current

(A rms)

Duration

(s) Applications Test

Connection Test Type Port Primary

4.6.112

4.6.143600 30, 25, 20, 12.5, 10, 7, 5,

3.75, 3, 2.6 & 2.2

900 1 Longitudinal

& Transverse

Second Level

Safety

External Removed

4.6.174, 5 120 25 Internal N/A

Surge Type

Minimum Peak

Open-Circuit

Conductor Voltage

(V)

Voltage

Waveshape

Minimum Peak

Short-Circuit

Conductor Current

(A)

Current

Waveshape

Test

Connection Port

800 <10/>560 100 <10/>560 Transverse

External

1500 <10/>160 200 <10/>160 Longitudinal

1000 9/720 25 5/320 Transverse

1500 9/720 27.334/2453Longitudinal

2.2 Telcordia GR–3108–CORE, Issue 1

(in development),

Generic Requirements for Network Equipment in

the Outside Plant (OSP) Telcordia Technologies

Generic Requirements

Defines OSP environmental performance

requirements which can be used during GR-1089-

CORE testing.

2.3 TIA-968-A-2002 with Addendums TIA-968-A-1

2003 and TIA-968-A-2 2004,

Telecommunications Telephone Terminal

Equipment: Technical Requirements for Connection

of Terminal Equipment to the Telephone Network

(Formally known as “FCC Part 68”)

Lightning surge test circuits and performance levels

for the external line ports of equipment installed at

the customer premise. Power fault and safety

requirements will come from UL 60950-1

compliance. Table 4 summaries the impulse test

conditions of this standard.

2.4 UL 60950-1, April 2003

Safety for Information Technology Equipment –

Safety – Part 1: General Requirements

AC and lightning surge test circuits and safety

performance for the external line ports of network

equipment. External port feed cable-overheating tests

are included. Table 6 summaries the AC power fault

tests and Figure 6 shows the overvoltage flow chart

for product approval.

UL 60950-1

Clause #1Test #

Open-Circuit

Conductor

Voltage

(V rms)

Short-Circuit

Conductor

Current

(A rms)

Duration

(s)

Test

Connection

Test

Type Port Wiring

Simulation

NAC.3.32

M-1, L-1

and F1 600 40 1.5

Longitudinal

& Transverse

Safety, No

Ignition or

Charring of the

Equipment

Cheesecloth

Indicator

External

M-2, L-2

and F2 600 7 5

M-3, L-3

and F3 600 2.2 1800

M-3A, L-3A

and F3A 600 <2.241800

M-4, L-4

and F4 <6005<2.251800

L-5 120 25 1800 Longitudinal Y3

Table 6. UL 60950-1 AC power fault tests

Notes:

1. AC sources are 50 Hz or 60 Hz, sinusoidal.

2. “M” tests are differential (metallic or transverse) mode tests. “L” tests are common (longitudinal) mode tests. “F” tests are 4-wire tests, one

pair is longitudinally tested and one port terminal of the other pair is grounded.

3. Used when a minimum 26 AWG telecommunications line cord is not provided or speciﬁed. Simulator may be a 50 mm length of 0.2 mm

(No. 32 AWG) solid copper wire or an MDL-2 fuse. For M-1, L-1 and F-4 an i2t measurement of less than 100 A2s can be used.

4. Test 3A is done when the current in test 3 is interrupted. The applied circuit current must be set to be just below the operating current

level of the equipment current limiter for the test duration.

5. Test 4A is done when the equipment voltage limiter, rated at 285 V peak or more, operated during tests 3 or 3A. The equipment voltage

and current levels are set at a level just below the voltage and current limiter threshold levels.

2.5 UL 60950-21, November 2003

Safety for Information Technology Equipment –

Safety – Part 21: Remote Power Feeding

Sets the safety performance levels of remote voltage

(RFT-V) or current (RFT-C) power feeds to

equipment.

2.6 UL 1459, 1999

Standard for Telephone Equipment

AC surge test circuits and safety performance for the

external line ports of equipment connected to the

network. External port feed cable-overheating tests

are included (NB maximum current levels are lower

than UL-60950-1).

2.7 UL 2444, (in development)

Network Equipment Standard

This is a safety-listing standard based on GR-1089-

CORE, UL 1459 and UL 60950-1.

2.8 ITU-T Recommendation K.20 (07-2003)

Resistibility of telecommunication equipment

installed in a telecommunications centre to

overvoltages and overcurrents

AC and lightning surge performance levels for the

external and internal line ports of equipment

installed at telecommunications centres. Two surge

withstand levels are specified, basic and enhanced.

Primary-equipment coordination tests are included.

2.9 ITU-T Recommendation K.21 (07-2003)

Resistibility of telecommunication equipment

installed in customer premises to overvoltages and

overcurrents

AC and lightning surge performance levels for the

external and internal line ports of equipment

installed at the customer premise. Two surge

withstand levels are specified, basic and enhanced.

Primary-equipment coordination tests are included.

2.10 ITU-T Recommendation K.44 (07-2003)

Resistibility tests for telecommunication equipment

exposed to overvoltages and overcurrents—Basic

Recommendation

AC and lightning surge test circuits to be used for

K.20, K.21 and K.45 performance evaluations. Tables

7 through to 9 summarise the tests and levels for

paired conductor ports in K.20, K.21 and K.45.

they originally appeared in “The 2004 ITU-T Telecommunication

Equipment Resistibility Recommendations” Compliance Engineering, 2004

Annual Reference Guide: 117-124. A further article on ITU-T testing is

“The New ITU-T Telecommunication Equipment Resistibility

Recommendations” Compliance Engineering 19, no. 1 (2002): 30-37.

100

Equipment

parameters

Connects to

outside cable?

Has 100 A2s

@ 600 V?1

Has minimum

26 AWG cord?

Yes

Pass Test 1?No

Yes

Has 1.3 A

DC limiting?2

Yes

Has

fire enclosure?

Yes

BEI

Pass 6.3.3

ground/line

separation?3

No No

Yes

Has fire enclosure

and spacings?

Yes

Pass test 2

pass tests 3, 4?

Yes

No overvoltage

testing

Test 1

600 V, 40 A

1.5 s

Test 5

120 V, 25 A,

30 min. or

open circuit

Test 24

600 V, 7 A, 5 s

Test 35

600 V, 2.2 A

Test 3A5

600 V, <2.2 A, 30 min.,

no open circuit

Test 45

<limiting voltage, <2.2 A,

30 min. , no open circuit,

no overvoltage protector

voltage limiting

Pass Test 5? Fail

Pass

Figure 6. UL 60950-1 Overvoltage ﬂow chart

UL 60950-1 (04/2003)

Information Technology Equipment – Safety – Part 1: General Requirements

Clause 6.4 – Protection against overvoltage from power line crosses

Figure 6C – Overvoltage ﬂowchart

Annex NAC (normative) – Power line crosses

Notes:

1. Overcurrent protector I2t must be lower than any other equipment element which carries the same current.

2. UL states a fuse with a 1 A or less rating meets the 1.3 A criterion.

3. Pass for 120 V A.C. between telecommunications line and ground current <10 mA.

4. Test 2 not required if the equipment D.C. breaking is 1.3 A or less. See Note 2.

5. Tests 3 and 4 not required for equipment with less than 1000 m of outside cable.

Pass Criteria Test 1 Test 2 Test 3 Test 3A Test 4 Test 5

No equipment cheesecloth charring 

Insulation OK 

50 mm of 32 AWG wire or MDL-2 A fuse OK 

I2t < 100 A2s @ 600 V rms AC 

101

Ports

Waveshape

(Notes)

No. of Tests

Test #

Lighting

Test

Description

Basic Test Levels Enhanced Test Levels Primary

Protection

Acceptance

Criteria

K.20 K.45 K.21 K.20 K.45 K.21

Single

10/700 Voltage

(Note 1)

+5, -5

2.1.1.a Inherent

Transverse

1.0 kV,

R = 25 Ω

1.5 kV,

R = 25 Ω

None A2.1.1.b Inherent

Port to Earth

1.0 kV,

R = 25 Ω

1.5 kV,

R = 25 Ω 6 kV,

R = 25 Ω

(Note 2)

2.1.1.c Inherent Port

to External Port —1.5 kV,

R = 25 Ω (Note 7) 1.5 kV,

R = 25 Ω

Single

10/700 Voltage

(Notes 3 & 4)

+5, -5

2.1.2.a Coordination

Transverse

4 kV,

R = 25 Ω

6 kV,

R = 25 Ω

Yes

Special

Protector

If Fitted,

Special

Protector

Must Operate

at Maximum

Test Level

2.1.2.b Coordination

Port to Earth

4 kV,

R = 25 Ω

2.1.2.c Coordination Port

to External Port —4 kV,

R = 25 Ω (Note 7) 4 kV,

R = 25 Ω

Multiple

10/700 Voltage

(Notes 1 & 5)

+5, -5

2.1.3a Inherent Port

to Earth

1.5 kV,

R = 25 Ω

None A

2.1.3b Inherent Port

to External Port —1.5 kV,

R = 25 Ω (Note 7) 1.5 kV,

R = 25 Ω

Multiple

10/700 Voltage

(Notes 3, 4 & 5)

+5, -5

2.1.4a Coordination

Port to Earth

4 kV,

R = 25 Ω

6 kV,

R = 25 Ω Yes

Agreed

Protector

2.1.4b Coordination Port

to External Port —4 kV,

R = 25 Ω (Note 7) 6 kV,

R = 25 Ω

Single

8/20 Current

(Note 6)

+5, -5

2.1.5a Port to Earth 1 kA/wire,

R = 0

5 kA/wire,

R = 0

None A

2.1.5b Port to

External Port —1 kA/wire,

R = 0 (Note 7) 5 kA/wire,

R = 0

Multiple

8/20 Current

(Note 5 and 6)

+5, -5

2.1.6a Port to Earth 1 kA/wire, R = 0,

6 kA Max. Return

5 kA/wire, R = 0,

30 kA Max. Return

None A

2.1.6b Port to

External Port —1 kA/wire, R = 0,

6 kA Max. Return (Note 7) 5 kA/wire, R = 0,

30 kA Max. Return

Table 7. Lightning tests for ports connected to external symmetric-pair cables

Test levels are given as the maximum D.C. charge voltage of the surge generator or current delivered to a tested equipment terminal and R

is the value of current limit resistor. The current limit resistor, R, may be internal or external to the generator.

Notes

1. Not applied to equipment designed to be always used with primary protection. For K.20, K.21 and Test 2.1.1 there must be operator

agreement and the an appropriate internal port test applied (see Table III).

2 Equipment with conductor to ground SPDs shall be tested at 1.5 kV instead of 6 kV. Insulated case equipment has 6 kV insulation test.

3. With network operator and manufacturer agreement, equipment containing high current carrying components which eliminate the

need for primary protection shall be tested without primary protection. Testing shall done with highest voltage high current carrying

components.

4. Equipment, which agreed not to use primary protection, shall be tested without primary protection. K.44, 3.1.4

5. Simultaneously applied to all ports. When the equipment has more than 8 ports, only 8 of the ports are tested.

6. Only for equipment, which contains high current carrying components that eliminate the need for primary protection.

7. Apply K.45 port to external port test at the K.20 enhanced level for small telecommunication centres with less than 250 lines.

102

Ports

Frequency

(Notes)

No. of Tests

Test #

Power

Test

Description

Basic Test Levels Enhanced Test Levels Primary

Protection

Acceptance

Criteria

K.20 K.45 K.21 K.20 K.45 K.21

Single

16-2/3 Hz,

or 50 Hz

or 60 Hz

(Note 1)

2.2.1.a

Induction

Inherent

Transverse

I2t = 0.2 A2s;

V = 600 V rms max.;

R = 600 Ω; t = 0.2 s

None A2.2.1.b

Induction

Inherent

Port to Earth

I2t = 0.2 A2s;

V = 600 V rms max.;

R = 600 Ω; t = 0.2 s

2.2.1.c

Induction

Inherent Port

to External Port

—

I2t = 0.2 A2s;

V = 600 V rms max.;

R = 600 Ω; t = 0.2 s

(Note 6)

I2t = 0.2 A2s;

V = 600 V rms max.;

R = 600 Ω; t = 0.2 s

Single

16-2/3 Hz,

or 50 Hz

or 60 Hz

(Note 2)

5 at each

test level

2.2.2.a

Induction

Coordination

Transverse

I2t = 1.0 A2s;

V = 600 V rms max.;

R = 600 Ω; t = 1.0 s; (Note 3)

I2t = 10 A2s;

450 V rms ≤ v ≤ 1500 V rms;

R = 200 Ω; 0.18 s ≤ t ≤ 2.0 s;

t = (400 000)/(v)2; (Note 4)

Yes

Special

(Agreed

Primary)

Test

Protector

2.2.2.b

Induction

Coordination

Port to Earth

I2t = 1.0 A2s;

V = 600 V rms max.;

R = 600 Ω; t = 1.0 s; (Note 3)

I2t = 10 A2s;

450 V ≤ v ≤ 1500 V rms;

R = 200 Ω; 0.18 s ≤ t ≤ 2.0 s;

t = (400 000)/(v)2; (Note 4)

2.2.2.c

Induction

Coordination

Port to

External Port

—

I2t = 1.0 A2s;

V = 600 V rms max.;

R = 600 Ω; t = 1.0 s;

(Note 3)

(Note 6)

I2t = 10 A2s;

450 V ≤ v ≤ 1500 V rms;

R = 200 Ω;

0.18 s ≤ t ≤ 2.0 s;

t = (400 000)/(v)2;

(Note 4)

Single

50 Hz

or 60 Hz

(Note 5)

1 set

2.3.1.a

Contact

Inherent

Transverse

V = 230 V rms;

R = 10 Ω, 20 Ω, 40 Ω, 80 Ω, 160 Ω, 300 Ω, 600 Ω, and 1000 Ω;

t = 900 s for each resistor value

None

Except A for

Enhanced

Level Testing

using

R = 160 Ω,

300 Ω and

600 Ω

2.3.1.b

Contact

Inherent

Port to Earth

V = 230 V rms;

R = 10 Ω, 20 Ω, 40 Ω, 80 Ω, 160 Ω, 300 Ω, 600 Ω, and 1000 Ω;

t = 900 s for each resistor value

2.3.1.c

Contact

Inherent Port

to External Port

—

V = 230 V rms;

R = 10 Ω, 20 Ω, 40 Ω,

80 Ω, 160 Ω, 300 Ω,

600 Ω, and 1000 Ω;

t = 900 s for each

resistor value

(Note 6)

V = 230 V rms;

R = 10 Ω, 20 Ω, 40 Ω,

80 Ω, 160 Ω, 300 Ω,

600 Ω, and 1000 Ω;

t = 900 s for each

resistor value

Table 8. AC tests for ports connected to external symmetric-pair cables

Test levels are given as the maximum or range of generator open circuit A.C. voltages, A.C. frequency, test time and R is the value or values

of current limit resistor.

Notes

1. Not applied to equipment designs to be always used with primary protection. K.20 and K.21 equipment also needs operator agreement.

2. Equipment, containing high current carrying components, which eliminate the need for primary protection shall be tested without

primary protection. Equipment shall use special worst-case high current carrying components.

3. To suit local conditions a voltage of 300 V rms ≤ V ≤ 600 V rms and time t ≤ 1.0 s may be speciﬁed. The series current limit resistance shall

then be R = V(t)0.5

4. All voltage-time combinations shall be tested as deﬁned by the time equation.

5. Equipment, which is always used with primary protection, shall be tested with special agreed primary protector.

6. Apply K.45 port to external port test at the K.20 enhanced level for small telecommunication centres with less than 250 lines.

103

Ports

Generator

(Notes)

No. of Tests

Test #

Lighting

Test

Description

Basic Test Levels Enhanced Test Levels Primary

Protection

Acceptance

Criteria

K.20 K.45 K.21 K.20 K.45 K.21

Single

8/20, 1.2/50

+5, -5

7.1

Unshielded Cable

Inherent

Longitudinal

500 V,

R = 10 Ω —1.0 kV,

R = 10 Ω

1.0 kV,

R = 10 Ω —1.5 kV,

R = 10 Ω

None A

Multiple

8/20, 1.2/50

(Note 1)

+5, -5

7.2

Shielded Cable

Inherent

Longitudinal

500 V,

R = 0 —1.0 kV,

R = 0

1.0 kV,

R = 0 —1.5 kV,

R = 0

Table 9. Lighning tests for ports connected to internal symmetric-pair cables.

Test levels are given as the maximum DC charge voltage of the surge generator delivered to a tested equipment terminal and R is the value

of current limit resistor. The current limit resistor, R, may be internal or external to the generator.

Note:

1. Cable screen is returned the port wires at the generator feed end see Figure 6.

2.11 ITU-T Recommendation K.45 (07-2003)

Resistibility of telecommunication equipment

installed in the access and trunk networks to

overvoltages and overcurrents

AC and lightning surge performance levels for the

external line ports of access (OSP) equipment. Two

surge withstand levels are specified, basic and

enhanced. Primaryequipment coordination tests are

included.

2.12 ITU-T Recommendation K.50 (02/2000)

Safe limits of operating voltages and currents for

telecommunication systems powered over the

network

Provides guidance on voltages and currents that may

be safely used to power telecommunication systems

that are part of the network. Content is similar to

UL 60950-21.

2.13 ITU-T Recommendation K.51 (02/2000)

Safety criteria for telecommunication equipment

Recommendation uses ITU-T recommendation K.50

and parts of IEC 60950.

2.14 IEC 61000-4-5 (2001-04), Ed. 1.1

Electromagnetic compatibility (EMC)- Part 4-5:

Testing and measurement techniques - Surge

immunity test

Lightning surge test circuits and levels for the

external and internal line ports of networked

equipment

2.15 ETSI EN 300 386-1, (2003-05)

Electromagnetic compatibility and Radio spectrum

Matters (ERM); Telecommunication network

equipment; ElectroMagnetic Compatibility (EMC)

requirements

Lightning surge test circuits and performance level

overview for the external and internal line ports of

network equipment referencing IEC 61000-4-5.

2.16 ETSI EN 300 386-2, (1997-12)

Electromagnetic compatibility and Radio spectrum

Matters (ERM); Telecommunication network

equipment; ElectroMagnetic Compatibility (EMC)

requirements; Part 2: Product family standard

Consolidated product test and performance standard

for the external and internal line ports of network

equipment. Internal port lightning surge testing

references EN 61000- 4-5 (1995) tests. External line

power induction testing references ITU-T

Recommendation K.20 (1993) and lightning surge

references ITU-T Recommendation K.20 (1993) or

K.21 (1988).

3 Surge Protective Devices

3.1 GR-1361, Issue 2, September 1998

Generic Requirements for Gas Tube Protector Units

(GTPUS)

AC and lightning surge test circuits and performance

levels for primary protectors using Gas Discharge

Tubes, GDTs with and without current-limiting

components.

104

3.2 GR-974-CORE, Issue 3

Generic Requirements for Telecommunications Line

Protector Units (TLPUs)

AC and lightning surge test circuits and performance

levels for primary protectors using GDTs or solid-

state overvoltage protectors or hybrid combinations

with and without current-limiting components.

3.3 UL 497, Edition 7 (April 2001)

Standard for Protectors for Paired Conductor

Communications Circuits

AC and impulse surge test circuits and performance

levels for voltage-limiting paired-conductor primary

protectors with and without current-limiting

components. These devices are to be used in

accordance with the applicable requirements of the

National Electrical Code, ANSI/NFPA 70.

3.4 UL 497A, Edition 3 (March 2001)

Standard for Secondary Protectors for

Communications Circuits

AC and impulse surge test circuits and performance

levels for current-limiting pairedconductor

secondary protectors with and without voltage-

limiting components. Test conditions are similar to

those in UL 60950-1. These devices are to be used in

accordance with the applicable requirements of the

National Electrical Code, ANSI/NFPA 70.

3.5 UL 497B, Edition 4 (June 2004)

Standard for Protectors for Data Communication

and Fire Alarm Circuits

AC and impulse surge test circuits and performance

levels for voltage-limiting pairedconductor

secondary protectors with and without current-

limiting components.

3.6 UL 497C Edition 2 (August 2001)

Standard for Protectors for Coaxial

Communications Circuits

AC and impulse surge test circuits and performance

levels for voltage-limiting coaxial cable protectors

with and without current-limiting components.

These devices are to be used in accordance with the

applicable requirements of the National Electrical

Code, ANSI/NFPA 70.

3.7 IEEE Std C62.36-2000

IEEE Standard Test Methods for Surge Protectors

Used in Low-Voltage Data, Communications, and

Signalling Circuits.

Sets of AC and impulse surge tests for surge

protectors with and without current-limiting

components.

3.8 IEEE Std C62.64-1997

IEEE Standard Specifications for Surge Protectors

Used in Low-Voltage Data, Communications, and

Signalling Circuits

Sets of AC and impulse surge preferred performance

levels for surge protectors with and without current-

limiting components.

3.9 ITU-T Recommendation K.28 (03/1993)

Characteristics of semi-conductor arrester

assemblies for the protection of telecommunications

installations

AC and impulse surge tests and preferred

performance levels for semi-conductor voltage-

limiting paired-conductor primary protectors.

3.10 IEC 61643-21 (2000-09)

Low voltage surge protective devices - Part 21: Surge

protective devices connected to telecommunications

and signalling networks - Performance

requirements and testing methods

Sets of AC and impulse surge tests for surge

protectors with and without current-limiting

components.

3.11 ATIS T1.337-2004

Requirements for Maximum Voltage, Current, and

Power Levels in Network-Powered Transport

Systems

This document provides maximum dc steady state

and duration limited voltage, current, and power

limits to be observed when powering transport

systems over conventional network

telecommunications twisted-pair conductors. The

technical requirements contained herein are based

on industry-recognized safety and design standards,

addresses both the network and customer premises

environments, and are independent of the transport

system technology employed. Signalling levels and

transients are not covered, but should be considered

when evaluating a transport system for conformance

105

to these requirements if they will impact voltage,

current, or power levels.

3.12 ATIS T1.338-2004

Electrical Coordination of Primary and Secondary

Surge Protective Devices for Use in

Telecommunications Circuits

This document covers the electrical coordination

between primary and secondary surge protection

devices that are both connected to ground. Proper

coordination is essential to ensure that both primary

and secondary protectors operate in a manner that

provides the protected equipment with the most

effective protection from AC power or lightning

surges. This document does not address protection

of the AC power service.

4 Surge Protective Components

4.1 REA Bulletin 345-83

Specification for Gas Tube Surge Arrestor,

RUS PE- 80

AC and impulse surge tests and performance levels

for heavy duty GDTs in rural service.

4.2 ITU-T Recommendation K.12 (02/2000)

Characteristics of gas discharge tubes for the

protection of telecommunications installations

Sets of AC and impulse surge tests and preferred

performance levels for GDTs

4.3 IEEE Std C62.3x

Series of Test Specifications For Surge Protective

Components

4.3.1 IEEE Std C62.31-1987

IEEE Standard Test Specifications For Gas-Tube

Surge-protective Devices

4.3.2 IEEE Std C62.32-1981

IEEE standard test specifications for low-voltage air

gap surge-protective devices (excluding valve and

expulsion type devices)

4.3.3 IEEE Std C62.33-1982

IEEE standard test specifications for varistor surge-

protective devices

4.3.4 IEEE Std C62.35-1987

IEEE standard test specifications for avalanche

junction semiconductor surge protective devices

4.3.5 IEEE Std C62.37-1996

IEEE standard test specification for thyristor diode

surge protective devices

4.4 IEC 61643-3x1

Series of test specifications for low-voltage surge

protective components

4.4.1 IEC 61643-311 (2001-10), Ed. 1.0

Components for low-voltage surge protective devices

- Part 311: Specification for gas discharge tubes

(GDT)

4.4.2 IEC 61643-321 (2001-12) Ed. 1.0

Components for low-voltage surge protective devices

- Part 321: Specifications for avalanche breakdown

diode (ABD)

4.4.3 IEC 61643-331 (2003-05) Ed. 1.0

Components for low-voltage surge protective devices

- Part 331: Specification for metal oxide varistors

(MOV)

4.4.4 IEC 61643-341 (2001-11) Ed. 1.0

Components for low-voltage surge protective devices

- Part 341: Specification for thyristor surge

suppressors (TSS)

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