SZ1SMA36CAT3G - LITTELFUSE

Speciﬁcations are subject to change without notice.

Revised: 07/29/20

TVS Diodes

Surface Mount > 400W > SZ1SMA Series

• Zener Transient

Overvoltage Suppressors

• Working Peak Reverse

Voltage Range −5V to 70V

for uni-directional and 10 V

to 78 V for bi-directional

• Standard Zener

Breakdown Voltage Range

−11.1 V to 95.83 V for bi-

directional, 6.4 V to 86.0 V

for uni-directional

• Peak Power − 400 W @ 1

• ESD Rating of Class 3 (>

16 kV) per Human Body

Model

• Response Time is Typically

< 1 ns

• Flat Handling Surface for

Accurate Placement

• Package Design for Top

Slide or Bottom Circuit

Board Mounting

• Low Proﬁle Package

• Pb-free means 2nd level

interconnect is Pb-free

and the terminal ﬁnish

material is tin(Sn) (IPC/

JEDEC J-STD-609A.01)

• SZ Preﬁx for Automotive

and Other Applications

Requiring Unique Site

and Control Change

Requirements; AEC−

Q101 Qualiﬁed and PPAP

Capable

• Recognized to UL 497B

as an Isolated Loop Circuit

Protector

• RoHS-compliant

Features

The SZ1SMA series is designed to protect voltage sensitive

components from high voltage, high energy transients. They

have excellent clamping capability, high surge capability, low

zener impedance and fast response time. The SZ1SMA

series is supplied in the Littelfuse exclusive, cost-effective,

highly reliable package and is ideally suited for use in

communication systems, automotive, numerical controls,

process controls, medical equipment, business machines,

power supplies and many other industrial and

consumer applications.

Description

Parameter Symbol Value Unit

Peak Power Dissipation (Note 1) @ TL = 25°C,

Pulse Width = 1 ms PPK 400 W

DC Power Dissipation @ TL = 75°C Measured

Zero Lead Length (Note 2)

Derate Above 75°C

Thermal Resistance from Junction−to−Lead

RƟJL

1.5

mW/°C

°C/W

DC Power Dissipation (Note 3) @ TA = 25°C

Derate Above 25°C

Thermal Resistance from Junction–to– Ambient

RƟJA

0.5

4.0

250

mW/°C

°C/W

Forward Surge Current (Note 4) @ TA = 25°C

(for uni-directional) IFSM 40 A

Operating and Storage Temperature Range TJ

Tstg

-65 to +150 °C

Maximum Ratings and Thermal Characteristics

SZ1SMA Series

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits

are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected.

1. 10 X 1000 µs, non−repetitive.

2. 1” square copper pad, FR−4 board.

3. FR−4 board, using Littelfuse minimum recommended footprint

4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum. (for uni-

directional)

Additional Information

Samples

Resources

Datasheet

Bi-directional

Uni-directional

Agency Approvals

Agency Agency File Number

E128662

RoHS

Functional Diagram

Bi-directional

Uni-directional

Cathode Anode

Speciﬁcations are subject to change without notice.

Revised: 07/29/20

TVS Diodes

Surface Mount > 400W > SZ1SMA Series

Symbol Parameter

IPP Maximum Reverse Peak Pulse Current

VCClamping Voltage @ IPP

VRWM Working Peak Reverse Voltage

IRMaximum Reverse Leakage Current @ VRWM

VBR Breakdown Voltage @ IT

ITTest Current

RWM

For Bi-directional

I-V Curve Characteristics (TA = 25°C unless otherwise noted) – For Bi-directional

Symbol Parameter

IPP Maximum Reverse Peak Pulse Current

VCClamping Voltage @ IPP

VRWM Working Peak Reverse Voltage

IRMaximum Reverse Leakage Current @ VRWM

VBR Breakdown Voltage @ IT

ITTest Current

IFForward Current

VFForward Voltage @ IF

I-V Curve Characteristics (TA = 25°C unless otherwise noted, VF = 3.5 V Max. @ IF = 30 A for all types) (Note 5) – For Uni-directional

5. 1/2 sine wave or equivalent, PW = 8.3 ms, non−repetitive duty cycle.

For Uni-directional

Speciﬁcations are subject to change without notice.

Revised: 07/29/20

TVS Diodes

Surface Mount > 400W > SZ1SMA Series

Electrical Characteristics – For Uni-directional

Device Device

Marking

VRWMNote 6 IR @

VRWM

Breakdown Voltage VC @ IPPNote 8

C Typ.Note 9

Agency

Approval

VBR @ IT (V)Note 7 @ ITVCIPP

Volts µA MIN NOM MAX mA Volts Amps pF

SZ1SMA5.0AT3G QE 5.0 400 6.40 6.70 7. 0 0 10 9.2 43.5 2035 X

SZ1SMA6.0AT3G QG 6.0 400 6.67 7.02 7.37 10 10.3 38.8 1730 X

SZ1SMA6.5AT3G QK 6.5 250 7.22 7.60 7.98 10 11.2 35.7 1605 X

SZ1SMA8.0AT3G QR 8.0 25 8.89 9.36 9.83 113.6 29.4 1035 X

SZ1SMA8.5AT3G QT 8.5 5.0 9.44 9.92 10.40 114.4 27.8 1265 X

SZ1SMA9.0AT3G QV 9.0 2.5 10.00 10.55 11. 10 115.4 26.0 1200 X

SZ1SMA10AT3G QX 10 2.5 11. 10 11.70 12.30 11 7. 0 23.5 1090 X

SZ1SMA11AT3G QZ 11 2.5 12.20 12.85 13.50 118.2 22.0 1000 X

SZ1SMA12AT3G RE 12 2.5 13.30 14.00 14.70 119.9 20.1 925 X

SZ1SMA13AT3G RG 13 2.5 14.40 15.15 15.90 121.5 18.6 860 X

SZ1SMA14AT3G RH 14 2.5 15.60 16.40 17.20 123.2 17. 2 800 X

SZ1SMA15AT3G RM 15 2.5 16.70 17.60 18.50 124.4 16.4 758 X

SZ1SMA16AT3G RP 16 2.5 17.80 18.75 19.70 126.0 15.4 715 X

SZ1SMA17AT3G RR 17 2.5 18.90 19.90 20.90 127.6 14.5 680 X

SZ1SMA18AT3G RT 18 2.5 20.00 21.05 22.10 129.2 13.7 645 X

SZ1SMA20AT3G RV 20 2.5 22.20 23.35 24.50 132.4 12.3 585 X

SZ1SMA22AT3G RX 22 2.5 24.40 25.65 26.90 135.5 11. 3 540 X

SZ1SMA24AT3G RZ 24 2.5 26.70 28.10 29.50 138.9 10.3 500 X

SZ1SMA26AT3G SE 26 2.5 28.90 30.40 31.90 142.1 9.5 460 X

SZ1SMA28AT3G SG 28 2.5 31.10 32.75 34.40 145.4 8.8 430 X

SZ1SMA30AT3G SK 30 1.0 33.30 35.05 36.80 148.4 8.3 405 X

SZ1SMA33AT3G SM 33 2.5 36.70 38.65 40.60 153.3 7. 5 375 X

SZ1SMA36AT3G SP 36 2.5 40.00 42.10 44.20 158.1 6.9 345 X

SZ1SMA40AT3G SR 40 2.5 44.40 46.75 49.10 164.5 6.2 315 X

SZ1SMA43AT3G ST 43 2.5 47.80 50.30 52.80 169.4 5.8 295 X

SZ1SMA45AT3G SV 45 2.5 50.00 52.65 55.30 172.2 5.5 280 X

SZ1SMA48AT3G SX 48 2.5 53.30 56.10 58.90 177.4 5.2 265 X

SZ1SMA51AT3G SZ 51 2.5 56.70 59.70 62.70 182.4 4.9 252 -

SZ1SMA54AT3G TE 54 2.5 60.00 63.15 66.30 187.1 4.6 240 X

SZ1SMA58AT3G TG 58 2.5 64.40 67.80 71.50 193.6 4.3 225 X

SZ1SMA60AT3G TK 60 2.5 66.70 70.20 73.72 196.8 4.1 219 -

SZ1SMA70AT3G TP 70 2.5 77.80 81.90 86.00 1113.0 3.5 190 X

Electrical Characteristics - For Bi-directional

Device Device

Marking

VRWMNote 6 IR @

VRWM

Breakdown Voltage VC @ IPP(Note 8

Agency

Approval

VBR @ IT (V)Note 7 @ ITVCIPP

Volts µA MIN NOM MAX mA Volts Amps

SZ1SMA10CAT3G QXC 10 2.5 11. 10 11.69 12.27 117. 0 23.5 X

SZ1SMA12CAT3G REC 12 2.5 13.30 14.00 14.70 119.9 20.1 X

SZ1SMA13CAT3G RGC 13 2.5 14.40 15.16 15.92 121.5 18.6 X

SZ1SMA15CAT3G RMC 15 2.5 16.70 17.58 18.46 124.4 16.4 X

SZ1SMA16CAT3G RPC 16 2.5 17.80 18.74 19.67 126.0 15.4 X

SZ1SMA18CAT3G RTC 18 2.5 20.00 21.06 22.11 129.2 13.7 X

SZ1SMA20CAT3G RVC 20 2.5 22.20 23.37 24.54 132.4 12.3 X

SZ1SMA22CAT3G RXC 22 2.5 24.4 25.65 26.90 135.5 11. 3 -

SZ1SMA24CAT3G RZC 24 2.5 26.70 28.11 29.51 138.9 10.3 X

SZ1SMA26CAT3G SEC 26 2.5 28.90 30.42 31.94 142.1 9.5 X

SZ1SMA28CAT3G SGC 28 2.5 31.10 32.74 34.37 145.4 8.8 X

SZ1SMA30CAT3G SKC 30 2.5 33.30 35.06 36.81 148.4 8.3 X

SZ1SMA33CAT3G SMC 33 2.5 36.70 38.63 40.56 153.3 7. 5 X

SZ1SMA36CAT3G SPC 36 2.5 40.00 42.11 44.21 158.1 6.9 X

SZ1SMA40CAT3G SRC 40 2.5 44.40 46.74 49.07 164.5 6.2 X

SZ1SMA43CAT3G STC 43 2.5 47.80 50.30 52.80 169.4 5.8 -

SZ1SMA45CAT3G SVC 45 2.5 50.00 52.65 55.30 172.2 5.5 -

SZ1SMA48CAT3G SXC 48 2.5 53.30 56.11 58.91 177.4 5.2 X

SZ1SMA58CAT3G TGC 58 2.5 64.40 67.79 71.18 193.6 4.3 X

SZ1SMA60CAT3G TKC 60 2.5 66.70 70.21 73.72 196.8 4.1 X

SZ1SMA70CAT3G TPC 70 2.5 77.80 81.90 85.99 1113.0 3.5 X

SZ1SMA78CAT3G TTC 78 2.5 86.70 91.27 95.83 1126.0 3.2 X

6. A transient suppressor is normally selected according to the working peak reverse voltage (VRWM), which should be equal to or greater than the DC or continuous peak

operating voltage level

7. VBR measured at pulse test current IT at an ambient temperature of 25°C

8. Surge current waveform per Figure 2 and derate per Figure 3

9. Bias voltage = 0 V, F = 1.0 MHz, TJ = 25°C.

Speciﬁcations are subject to change without notice.

Revised: 07/29/20

TVS Diodes

Surface Mount > 400W > SZ1SMA Series

Figure 1. Pulse Rating Curve

Ratings and Characteristic Curves

Figure 2. Pulse Waveform

Figure 3 - Surge Derating Curve Figure 4. Typical Junction Capacitance vs. Bias Voltage

100

1000

10000

100000

0.0001 0.001 0.01 0.1 1 10

Ppk, Peak Power (W)

tp,Pulse Width (ms)

NONREPETITIVE

PULSE WAVEFORM

SHOWN IN FIGURE 2.

TA=25˚C

100

120

0 40 80 120 160 200

Peak Pulse Derating in

of Peak Current (%)

TA Ambient Temperature (˚C)

10/1000 WAVEFORM

TA= 25°C

PW (ID) is deﬁned as the

point where the peak current

decays to 50% of IPP

= 10µs

Peak Value

IPPM

Half Value - IPP/2

10/1000 µs Waveform

as deﬁned by R.E.A.

012345

120

100

t, Time (ms)

IPPM, Peak Pulse Current (%)

1,000

100

BIAS VOLTAGE (VOLTS)

F = 1 MHz

C, CAPACITANCE (pF)

SZ1SMA10CAT3G

SZ1SMA18CAT3G

SZ1SMA48CAT3G

SZ1SMA78CAT3G

1 10 100

BIAS VOLTAGE (VOLTS)

TJ = 25°C

F = 1 MH z

C, CAPACITANCE (pF)

10,000

1,000

100

1 10 100

SZ1SMA10AT3G

SZ1SMA5.0AT3G

SZ1SMA36AT3G

SZ1SMA64AT3G

Figure 5. Typical Junction Capacitance vs. Bias Voltage

T, TEMPERATURE (°C)

50 100 150

PD, MAXIMUM POWER DISSI PATION (WATTS)

@ TL = 75°C

PD = 1.5 W

@ TA = 25°C

PD = 0.5 W

25 75 125

Figure 6. Steady State Power Derating

TJ= 25°C

Speciﬁcations are subject to change without notice.

Revised: 07/29/20

TVS Diodes

Surface Mount > 400W > SZ1SMA Series

Physical Speciﬁcations

Weight 0.00246 ounce, 0.0767 grams

Case JEDEC DO214AC. Void-Free, Transfer-Molded, Thermosetting

Plastic Epoxy Meets UL 94V-0

Polarity Color band denotes cathode for unidirectional components.

Terminal Matte Tin-plated leads, Solderable per JESD22-B102

Soldering Parameters

Temperature (T)

Time (t)

Ts(min)

Ts(max)

Preheat

Ramp-up Critical Zone

TL to TP

Ramp-down

t 25˚C to Peak

25˚C

Reﬂow Condition Lead–free assembly

Pre Heat

- Temperature Min (Ts(min))150°C

- Temperature Max (Ts(max))200°C

- Time (min to max) (ts)60 – 120 secs

Average ramp up rate (Liquidus Temp (TL) to peak 3°C/second max

TS(max) to TL - Ramp-up Rate 3°C/second max

Reﬂow - Temperature (TL) (Liquidus) 217°C

- Time (min to max) (tL)60 – 150 seconds

Peak Temperature (TP)260+0/-5 °C

Time within 5°C of actual peak Temperature (tp)30 seconds max

Ramp-down Rate 6°C/second max

Time 25°C to peak Temperature (TP)8 minutes max.

Do not exceed 260°C

Environmental Speciﬁcations

High Temp. Storage JESD22-A103

HTRB JESD22-A108

Temperature Cycling JESD22-A104

MSL JEDEC-J-STD-020, Level 1

H3TRB JESD22-A101

RSH JESD22-A111

Soldering Footprint

Ordering Information

Device** Package Shipping

SZ1SMAxxAT3G SMA

(Pb−Free) 5,000 /

Tape & Reel

SZ1SMAxxCAT3G SMA

(Pb−Free) 5,000 /

Tape & Reel

4.000

0.157

2.000

0.079

2.000

0.079

inches

SCALE 8:1

**The “T3” sufﬁx refers to a 13 inch reel

Dimensions

Dim Inches Millimeters

Min Nom Max Min Nom Max

A0.078 0.083 0.087 1.97 2.10 2.20

A1 0.002 0.004 0.008 0.05 0.10 0.20

b0.050 0.057 0.064 1.27 1.45 1.63

c0.006 0.011 0.016 0.15 0.28 0.41

D0.090 0.103 0.115 2.29 2.60 2.92

E0.160 0.170 0.180 4.06 4.32 4.57

HE0.190 0.205 0.220 4.83 5.21 5.59

L0.030 0.045 0.060 0.76 1. 14 1.52

The cathode indicator is for uni- devices only

Speciﬁcations are subject to change without notice.

Revised: 07/29/20

TVS Diodes

Surface Mount > 400W > SZ1SMA Series

Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are

not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics.

Part Marking System

Anode

Cathode YMAWW

XXXX =Device Code

Y=Year

M=Month

A=Assembly Location

WW =Lot Code SMA TVS

Type Code

CA Bi-Directional TVS

A Uni Directional TVS

Zener Automotive

SZ 1SMA CA T3

Tape/Reel Designator

Pb Free Plating

VOLTAGE

Part Numbering System

Tape and Reel Speciﬁcation

0.47

(12.0)

0.315

(8.0)

0.157

(4.0)

0.52

(13.3)

0.80 (20.2)

Arbor Hole Dia.

13.0 (330)

Dimensions are in inches

(and millimeters).

Direction of Feed

0.061 DIA

(1.55) Cover tape

Cathode mark for

uni-directional components

LFXXXX