Revision: November 15, 2011, 15:54
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
1
Axial Leaded – 20000W > 20KPA series
20KPA Series
Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
AGENCY AGENCY FILE NUMBER
E230531
20KPA Series
TVS devices 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.
Description
Parameter Symbol Value Unit
Peak Pulse Power Dissipation by
10x1000μs test waveform (Fig.1)
(Note 1)
PPPM 20000 W
Steady State Power Dissipation on
inifinite heat sink at TL=75ºC (Fig. 5) 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 RuJL 8.0 °C/W
Typical Thermal Resistance Junction
to Ambient RuJA 40 °C/W
Notes:
1. Non-repetitive current pulse , per Fig. 3 and derated above TA = 25OC per Fig. 2.
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
• Halogen-Free
• RoHS compliant
• Typical maximum
temperature coefficient
ΔVBR = 0.1% x VBR@25°C x ΔT
• Glass passivated chip
junction in P600 package
• 20000W peak pulse
capability at 10×1000μs
waveform, repetition rate
(duty cycles):0.01%
• Fast response time:
typically less than 1.0ps
from 0 Volts to BV min
• Excellent clamping
capability
• Low incremental surge
resistance
• Typical IR less than 2μA
above 49V
• High temperature
soldering guaranteed:
260°C/40 seconds /
0.375”,(9.5mm) lead
length, 5 lbs., (2.3kg)
tension
• Plastic package has
Underwriters Laboratory
Flammability classification
94V-O
• Matte Tin Lead–free plated
20KPA Series
RoHS
Pb
Revision: November 15, 2011, 15:54
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
2
Axial Leaded – 20000W > 20KPA series
20KPA Series
Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
Electrical Characteristics
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
Approval
MIN
20KPA20A 20KPA20CA 20 22.34 50 548.9 5000 36.8 X
20KPA24A 20KPA24CA 24 26.81 50 490.3 5000 41.2 X
20KPA26A 20KPA26CA 26 29.04 50 451.9 2000 44.7 X
20KPA28A 20KPA28CA 28 31.28 50 420.8 1000 48.0 X
20KPA30A 20KPA30CA 30 33.51 5 392.2 250 51.5 X
20KPA32A 20KPA32CA 32 35.74 5 372.0 150 54.3 X
20KPA34A 20KPA34CA 34 38.00 5 351.3 50 57.5 X
20KPA36A 20KPA36CA 36 40.20 5 328.5 20 61.5 X
20KPA40A 20KPA40CA 40 44.70 5 297.9 15 67.8 X
20KPA44A 20KPA44CA 44 49.10 5 277.9 2 72.7 X
20KPA48A 20KPA48CA 48 53.60 5 254.4 2 79.4 X
20KPA52A 20KPA52CA 52 58.10 5 235.4 2 85.8 X
20KPA56A 20KPA56CA 56 62.60 5 218.1 2 92.6 X
20KPA60A 20KPA60CA 60 67.00 5 207.0 2 97.6 X
20KPA64A 20KPA64CA 64 71.50 5 194.2 2 104.0 X
20KPA68A 20KPA68CA 68 76.00 5 183.6 2 110.0 X
20KPA72A 20KPA72CA 72 80.40 5 174.1 2 116.0 X
20KPA80A 20KPA80CA 80 89.40 5 155.4 2 130.0 X
20KPA88A 20KPA88CA 88 98.30 5 142.3 2 142.0 X
20KPA96A 20KPA96CA 96 107.20 5 130.3 2 155.0 X
20KPA104A 20KPA104CA 104 116.20 5 120.2 2 168.0 X
20KPA112A 20KPA112CA 112 125.10 5 111. 0 2 182.0 X
20KPA120A 20KPA120CA 120 134.00 5 104.1 2 194.0 X
20KPA132A 20KPA132CA 132 147.40 5 94.8 2 213.0 X
20KPA144A 20KPA144CA 144 160.80 5 87.1 2 232.0 X
20KPA160A 20KPA160CA 160 178.70 5 78.3 2 258.0 X
20KPA172A 20KPA172CA 172 192.10 5 72.9 2 277.0 X
20KPA180A 20KPA180CA 180 201.10 5 69.4 2 291.0 X
20KPA192A 20KPA192CA 192 214.50 5 65.4 2 309.0 X
20KPA204A 20KPA204CA 204 227.90 5 61.4 2 329.0 X
20KPA216A 20KPA216CA 216 241.30 5 58.0 2 348.0 X
20KPA232A 20KPA232CA 232 259.10 5 54.0 2 374.0 X
20KPA240A 20KPA240CA 240 268.10 5 52.2 2 387.0 X
20KPA256A 20KPA256CA 256 286.00 5 49.0 2 412.0 X
20KPA280A 20KPA280CA 280 312.80 5 44.8 2 451.0 X
20KPA300A 20KPA300CA 300 335.10 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.
Revision: November 15, 2011, 15:54
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
3
Axial Leaded – 20000W > 20KPA series
20KPA Series
Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
Ratings and Characteristic Curves (TA=25°C unless otherwise notedFigure 1 - Peak Pulse Power Rating Curve
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 ( )
0
20
40
60
80
100
0255075100 125 150 175 200
TA-Ambient temperature (ºC)
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage %
1
100
10000
050100 150 200250 300350
VBR - Reverse Breakdwon Voltage (V)
Cj, Junction Capacitance (pf)
Tj=25C
f=1.0MHz
Vsig=50mVp-p
Bi-directional
@ VR
Uni-direct ional V
= OV
Bi-direct ional V
= OV
Uni-direct ional
@ VR
0
1
2
3
4
5
6
7
8
9
0255075100 125150 175200
L = 0.375” (9.5mm)
Lead Lengths
Steady State Power Dissipation (W)
TL- Lead Temperature (ºC)
Figure 2 - Pulse Derating Curve
Figure 3 - Pulse Waveform Figure 4 - Typical Junction Capacitance
Figure 5 - Steady State Power Derating Curve
0
50
100
150
200
250
300
350
400
450
110 100
Number of Cycles at 60 Hz
IFSM, Peak Forward Surge Current (A)
Figure 6 - Maximum Non-Repetitive Peak Forward
Surge Current
1
10
100
1000
0.0000010.00001 0.0001 0.001
td-Pulse Width (sec.)
PPPM-Peak Pulse Power (kW)
Figure 1 - Peak Pulse Power Rating Curve
Revision: November 15, 2011, 15:54
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
4
Axial Leaded – 20000W > 20KPA series
20KPA Series
Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
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-B102D.
Dimensions
Dimensions Inches Millimeters
Min Max Min Max
A1.000 - 25.40 -
B 0.340 0.360 8.60 9.10
C 0.048 0.052 1.22 1.32
D 0.340 0.360 8.60 9.10
P600
Environmental Specifications
Temperature Cycle JESD22-A104
Pressure Cooker JESD 22-A102
High Temp. Storage JESD22-A103
HTRB JESD22-A108
Thermal Shock JESD22-A106
Soldering Parameters
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
(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) (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 280°C
Flow/Wave Soldering (Solder Dipping)
Peak Temperature : 265OC
Dipping Time : 10 seconds
Soldering : 1 time
C
BA
A
D
DO-204AC (DO-15)
Revision: November 15, 2011, 15:54
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
5
Axial Leaded – 20000W > 20KPA series
20KPA Series
Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
Part Numbering System
Packing Options
Part Number Component
Package Quantity Packaging
Option Packaging Specification
20KPAxxxXX P600 800 Tape & Reel EIA STD RS-296E
20KPAxxxXX-B P600 100 Bulk Littelfuse Concord Packing Spec. DM-0016
VOLTAGE CODE
(Refer to the Electrical Characteristics table)
TYPE CODE:
A Uni-Directional (5% Voltage Tolerance)
CA Bi-Directional
OPTION CODE:
BLANK Reel Tape
-B Bulk Packaging
SERIES CODE
20KPA xxx XX X
Part Marking System
F
20KPAXXX
Product Type
Littelfuse Logo
Cathode Band
Trace Code Marking
YYWW
Tape and Reel Specification
Direction of Feed
2.062
2.56
0.40
2.75
0.048
(76.2)
0.68
13.0
Recess Depth Max. 0.75 (19.05)
Off Center
either side
0.039(1.0)
Dimensions are in
inches/mm
Top View
Front View
Label
0.25
(65.00)
(10.16)
(52.37)
(6.35)
(1.22)
(69.85)
330.2
3.0
(17.27)
Negative Cathod
Lead Red Type
Anode Lead White Type
