Transient Voltage Suppression Diodes
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Axial Leaded – 20000W > 20KPA series
AGENCY AGENCY FILE NUMBER
E230531
TVS componants are ideal for the protection of I/O
interfaces, VCC bus and other vulnerable circuits used in
telecom, computer, industrial and consumer
electronic applications.
Applications
Features
The 20KPA Series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Descriptions
Parameter Symbol Value Unit
Peak Pulse Power Dissipation by
10/1000μs Test Waveform (Fig.2)
(Note 1)
PPPM 20 kW
Steady State Power Dissipation on
Infinite Heat Sink at TL=75ºC PD8.0 W
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave Unidirectional
Only (Note 2)
IFSM 400 A
Operating Junction and Storage
Temperature Range TJ, TSTG -55 to 175 °C
Typical Thermal Resistance
Junction to Lead RθJL 8.0 °C/W
Typical Thermal Resistance
Junction to Ambient RθJA 40 °C/W
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated above TJ (initial) =25OC per Fig. 3.
2. Measured on 8.3ms single half sine wave or equivalent square wave, duty cycle=4 per
minute maximum.
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Agency Approvals
• 20kW peak pulse
capability at 10/1000μs
waveform, repetition rate
(duty cycles):0.01%
• Glass passivated chip
junction in P600 package
• Fast response time:
typically less than 1.0ps
from 0 Volts to BV min
• Excellent clamping
capability
• Typical failure mode is
short from over-specified
voltage or current
• Whisker test is conducted
based on JEDEC
JESD201A per its table 4a
and 4c
• IEC-61000-4-2 ESD
30kV(Air), 30kV (Contact)
• ESD protection of data
lines in accordance with
IEC 61000-4-2
• EFT protection of data
lines in accordance with
IEC 61000-4-4
• Low incremental surge
resistance
• Typical IR less than 2μA
when VBR min>49V
• High temperature
to reflow soldering
guaranteed: 260°C/40sec
/ 0.375”, (9.5mm) lead
length, 5 lbs., (2.3kg)
tension
• VBR @ TJ= VBR@25°C
x (1+αT x (TJ - 25))
(αT:Temperature
Coefficient, typical value
is 0.1%)
• UL Recognized compound
meeting flammability
rating V-0
• Matte tin lead–free plated
• Halogen free and RoHS
compliant
• Pb-free E3 means 2nd
level interconnect is
Pb-free and the terminal
finish material is tin(Sn)
(IPC/JEDEC J-STD-
609A.01)
20KPA Series
Bi-directional
Uni-directional
Functional Diagram
Bi-directional
Uni-directional
Cathode Anode
RoHS
Pb
e3
Datasheet
Additional Infomarion
Resources Samples
Transient Voltage Suppression Diodes
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Axial Leaded – 20000W > 20KPA series
Electrical Characteristics (TA=25°C unless otherwise noted)
Part
Number
(Uni)
Part
Number
(Bi)
Reverse
Stand off
Voltage VR
(Volts)
Breakdown
Voltage VBR
(Volts) @ IT
Test
Current
IT
(mA)
Maximum
Peak
Pulse
Current Ipp
(A)
Maximum
Reverse
Leakage
IR @ VR
(µ A)
Maximum
Clamping
Voltage
VC @ IPP
(V)
Agency
Recognition
MIN MAX
20KPA20A 20KPA20CA 20 22.34 24.57 50 548.9 5000 36.8 X
20KPA24A 20KPA24CA 24 26.81 29.49 50 490.3 5000 41.2 X
20KPA26A 20KPA26CA 26 29.04 31.94 50 451.9 2000 44.7 X
20KPA28A 20KPA28CA 28 31.28 34.41 50 420.8 1000 48.0 X
20KPA30A 20KPA30CA 30 33.51 36.86 5 392.2 250 51.5 X
20KPA32A 20KPA32CA 32 35.74 39.31 5 372.0 150 54.3 X
20KPA34A 20KPA34CA 34 38.00 41.80 5 351.3 50 57.5 X
20KPA36A 20KPA36CA 36 40.20 44.22 5 328.5 20 61.5 X
20KPA40A 20KPA40CA 40 44.70 49.17 5 297.9 15 67.8 X
20KPA44A 20KPA44CA 44 49.10 54.01 5 277.9 2 72.7 X
20KPA48A 20KPA48CA 48 53.60 58.96 5 254.4 2 79.4 X
20KPA52A 20KPA52CA 52 58.10 63.91 5 235.4 2 85.8 X
20KPA56A 20KPA56CA 56 62.60 68.86 5 218.1 2 92.6 X
20KPA60A 20KPA60CA 60 67.00 73.70 5 207.0 2 97.6 X
20KPA64A 20KPA64CA 64 71.50 78.65 5 194.2 2 104.0 X
20KPA68A 20KPA68CA 68 76.00 83.60 5 183.6 2 110.0 X
20KPA72A 20KPA72CA 72 80.40 88.44 5 174.1 2 116.0 X
20KPA80A 20KPA80CA 80 89.40 98.34 5 155.4 2 130.0 X
20KPA88A 20KPA88CA 88 98.30 108.13 5 142.3 2 142.0 X
20KPA96A 20KPA96CA 96 107.20 117.92 5 130.3 2 155.0 X
20KPA104A 20KPA104CA 104 116.20 127.82 5 120.2 2 168.0 X
20KPA112A 20KPA112CA 112 125.10 137.61 5 111.0 2 182.0 X
20KPA120A 20KPA120CA 120 134.00 147.40 5 104.1 2 194.0 X
20KPA132A 20KPA132CA 132 147.40 162.14 5 94.8 2 213.0 X
20KPA144A 20KPA144CA 144 160.80 176.88 5 87.1 2 232.0 X
20KPA160A 20KPA160CA 160 178.70 196.57 5 78.3 2 258.0 X
20KPA172A 20KPA172CA 172 192.10 211.31 5 72.9 2 277.0 X
20KPA180A 20KPA180CA 180 201.10 221.21 5 69.4 2 291.0 X
20KPA192A 20KPA192CA 192 214.50 235.95 5 65.4 2 309.0 X
20KPA204A 20KPA204CA 204 227.90 250.69 5 61.4 2 329.0 X
20KPA216A 20KPA216CA 216 241.30 265.43 5 58.0 2 348.0 X
20KPA232A 20KPA232CA 232 259.10 285.01 5 54.0 2 374.0 X
20KPA240A 20KPA240CA 240 268.10 294.91 5 52.2 2 387.0 X
20KPA256A 20KPA256CA 256 286.00 314.60 5 49.0 2 412.0 X
20KPA280A 20KPA280CA 280 312.80 344.08 5 44.8 2 451.0 X
20KPA300A 20KPA300CA 300 335.10 368.61 5 41.8 2 483.0 X
For bidirectional type having VRWM of 40 volts and less, the IR limit is double.
For parts without A , the VBR is ± 10% and VC is 5% higher than with A parts.
Transient Voltage Suppression Diodes
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Axial Leaded – 20000W > 20KPA series
I-V Curve Characteristics
Voltage Transients
Time
Voltage Across TVS
Current Through TVS
Voltage or Current
Figure 1 - TVS Transients Clamping Waveform
Ratings and Characteristic Curves (TA=25°C unless otherwise noted)
Figure 2 - Peak Pulse Power Rating Curve
1
10
100
1000
0.0000010.00001 0.0001 0.001
td-Pulse Width (sec.)
PPPM-Peak Pulse Power (kW)
Vc VBR VR
IR
IT
Ipp
V
Uni-directional
VF
Vc VBR VR
IR
IT
Ipp
V
Vc
VBR
VR
Ipp
IR
IT
Bi-directional
PPPM Peak Pulse Power Dissipation -- Max power dissipation
VR Stand-off Voltage -- Maximum voltage that can be applied to the TVS without operation
VBR Breakdown Voltage -- Maximum voltage that flows though the TVS at a specified test current (IT)
VC Clamping Voltage -- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
IR Reverse Leakage Current -- Current measured at VR
VF Forward Voltage Drop for Uni-directional
continues on next page.
Transient Voltage Suppression Diodes
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Axial Leaded – 20000W > 20KPA series
IPPM- Peak Pulse Current, % IRSM
0
0
50
100
150
1.0 2.0 3.0 4.0
tr=10µsec
Peak Value
IPPM
IPPM
2
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
10/1000µsec. Waveform
as defined by R.E.A
td
t-Time (ms)
Half Value
IPPM ( )
Figure 3 - Peak Pulse Power Derating Curve Figure 4 - Pulse Waveform
Ratings and Characteristic Curves (TA=25°C unless otherwise noted) (Continued)
Cj (pF)
V
BR
- Reverse Breakdown Voltage (V)
1
10
100
1000
10000
100000
050100 150200 250300 350 400
Bi-direconal V=V
R
Bi-direconal V=V
R
Uni-direconal V=0V
Bi-direconal V=0V
Figure 5 - Typical Junction Capacitance
IFSM-Peak Forward Surve Current (A)
Number of Cycles at 60 Hz
0
100
200
300
400
500
600
700
800
900
1000
110100
Figure 7 - Maximum Non-Repetitive Peak Forward
Surge Current Uni-Directional Only
IF-Peak Forward Current(A)
VF-Peak Forward Voltage(V)
0.1
1
10
100
0.02.0 4.06.0 8.010.012.014.0
4 stacked-die
3 stacked-die
Figure 8 - Peak Forward Voltage Drop vs Peak Forward
Current (Typical Values)
Transient Thermal Impedance (°C/W)
-Pulse Duration (s)
TP
0.1
1
10
100
0.01 0.11 10 100 1000
Figure 6 - Typical Transient Thermal Impedance
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
0
25
50
75
100
0255075100 125 150 175 200
TJ - Initial Junction Temperature (ºC)
Transient Voltage Suppression Diodes
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Axial Leaded – 20000W > 20KPA series
Physical Specifications
Weight 0.07oz., 2.5g
Case P600 molded plastic body over
passivated junction.
Polarity Color band denotes the cathode except
Bipolar.
Terminal Matte Tin axial leads, solderable per
JESD22-B102.
Dimensions
Dimensions
Inches Millimeters
Min Max Min Max
A1.000 - 25.40 -
B 0.340 0.360 8.60 9.10
C 0.048 0.054 1.22 1.36
D 0.340 0.360 8.60 9.10
Soldering Parameter
Temperature (T)
Time (t)
Ts(min)
Ts(max)
TL
TP
ts
Preheat
tL
tp
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 –180 secs
Average ramp up rate (Liquidus Temp (TA)
to peak 3°C/second max
TS(max) to TA - Ramp-up Rate 3°C/second max
Reflow - Temperature (TA) (Liquidus) 217°C
- Time (min to max) (ts) 60 – 150 seconds
Peak Temperature (TP) 260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP) 8 minutes Max.
Do not exceed 260°C
Flow/Wave Soldering (Solder Dipping)
Peak Temperature : 265OC
Dipping Time : 10 seconds
Soldering : 1 time
Environmental Specifications
High Temp. Storage JESD22-A103
HTRB JESD22-A108
Temperature Cycling JESD22-A104
H3TRB JESD22-A101
RSH JESD22-B106
P600
D
AA
C
B
Cathode Band
(for uni-directional products only)
Transient Voltage Suppression Diodes
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Axial Leaded – 20000W > 20KPA series
Part Numbering System
Packing Options
Part Number Component
Package Quantity Packaging
Option Packaging Specification
20KPAxxxXX P600 800 Tape & Reel EIA STD RS-296
20KPAxxxXX-B P600 100 Bulk Littelfuse Spec.
TYPE CODE:
A Uni-Directional (5%
V
BR
Voltage Tolerance)
CA Bi-Directional (5%
V
BR
Voltage Tolerance)
OPTION CODE:
BLANK Reel Tape
-B Bulk Packaging
SERIES CODE
20KPA xxx XX X
V
R
VOLTAGE
Part Marking System
F
20KPAXXX
YYWW
Trace Code Marking
YY:Year Code
WW: Week Code
Product Type
Littelfuse Logo
Cathode Band
(for uni-directional
products only)
Tape and Reel Specification
2.063+0.079/-0.039
2.56
0.394+/-0.020
2.75
0.047
(330.2)
R
ecess Depth Max. 0.75 (19.05)
Off Center
either side
0.028(0.7)
Dimensions are in
inches/mm
0.236
(65.0)
(10.0+/-0.5)
(53.0+2.0/-1.0)
(6.0)
(1.2)
(69.85)
13.0
(76.2)
3.0
0.68
(17. 27)
Direction of Feed
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.
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20KPA132CA 20KPA68CA 20KPA204 20KPA32CA 20KPA36C 20KPA104CA 20KPA192A 20KPA280A
20KPA48CA 20KPA160CA 20KPA216C 20KPA36A 20KPA28 20KPA20A 20KPA96CA 20KPA104C 20KPA52C
20KPA56A 20KPA40 20KPA144CA 20KPA96 20KPA112A 20KPA28C 20KPA26 20KPA280CA 20KPA52A
20KPA240A 20KPA144 20KPA60 20KPA192CA 20KPA172A 20KPA34C 20KPA28A 20KPA72A 20KPA300C
20KPA204C 20KPA256CA 20KPA60C 20KPA204A 20KPA172CA 20KPA28CA 20KPA132A 20KPA72CA
20KPA280C 20KPA60A 20KPA40C 20KPA32 20KPA72 20KPA112CA 20KPA172C 20KPA20C 20KPA256A
20KPA52CA 20KPA232C 20KPA88A 20KPA40A 20KPA160 20KPA112C 20KPA180A 20KPA300 20KPA24A
20KPA216 20KPA34CA 20KPA300A 20KPA44 20KPA56C 20KPA120A 20KPA72C 20KPA104 20KPA300CA
20KPA44C 20KPA180 20KPA24CA 20KPA64 20KPA204CA 20KPA80 20KPA34 20KPA40CA 20KPA64C
20KPA216A 20KPA180CA 20KPA120
