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Transient Voltage Suppression Diodes
Axial Leaded - 20000W > 20KPA series
RoHS
20KPA Series
Description The 20KPA Series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. Features resistance less than 2A R above 49V soldering guaranteed: 260C/40 seconds / 0.375" ,(9.5mm) lead length, 5 lbs., (2.3kg) tension Underwriters Laboratory Flammability classification 94V-O
temperature coefficient Agency Approvals
AGENCY AGENCY FILE NUMBER E230531
VBR = 0.1% x VBR@25C x T
junction in P600 package capability at 10x1000s waveform, repetition rate (duty cycles):0.01% typically less than 1.0ps from 0 Volts to BV min
Unit W W A C C/W C/W
Maximum Ratings and Thermal Characteristics (TA=25OC unless otherwise noted)
Parameter Peak Pulse Power Dissipation by 10x1000s test waveform (Fig.1) (Note 1) Steady State Power Dissipation on inifinite heat sink at TL=75C (Fig. 5) Peak Forward Surge Current, 8.3ms Single Half Sine Wave Unidirectional only (Note 2) Operating Junction and Storage Temperature Range Typical Thermal Resistance Junction to Lead Typical Thermal Resistance Junction to Ambient Symbol PPPM PD IFSM TJ , TSTG RuJL RuJA Value 20000 8.0 400 -55 to 175 8.0 40
capability Applications
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.
(c)2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
117 Revision: January 09, 2009
20KPA Series
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.
Transient Voltage Suppression Diodes
Axial Leaded - 20000W > 20KPA series
Electrical Characteristics
Part Number (Uni) 20KPA20A 20KPA24A 20KPA26A 20KPA28A 20KPA30A 20KPA32A 20KPA34A 20KPA36A 20KPA40A 20KPA44A 20KPA48A 20KPA52A 20KPA56A 20KPA60A 20KPA64A 20KPA68A 20KPA72A 20KPA80A 20KPA88A 20KPA96A 20KPA104A 20KPA112A 20KPA120A 20KPA132A 20KPA144A 20KPA160A 20KPA172A 20KPA180A 20KPA192A 20KPA204A 20KPA216A 20KPA232A 20KPA240A 20KPA256A 20KPA280A 20KPA300A Part Number (Bi)
20KPA20CA 20KPA24CA 20KPA26CA 20KPA28CA 20KPA30CA 20KPA32CA 20KPA34CA 20KPA36CA 20KPA40CA 20KPA44CA 20KPA48CA 20KPA52CA 20KPA56CA 20KPA60CA 20KPA64CA 20KPA68CA 20KPA72CA 20KPA80CA 20KPA88CA 20KPA96CA 20KPA104CA 20KPA112CA 20KPA120CA 20KPA132CA 20KPA144CA 20KPA160CA 20KPA172CA 20KPA180CA 20KPA192CA 20KPA204CA 20KPA216CA 20KPA232CA 20KPA240CA 20KPA256CA 20KPA280CA 20KPA300CA
Reverse Stand off Voltage VR (Volts)
20 24 26 28 30 32 34 36 40 44 48 52 56 60 64 68 72 80 88 96 104 112 120 132 144 160 172 180 192 204 216 232 240 256 280 300
Breakdown Voltage VBR (Volts) @ IT MIN
22.34 26.81 29.04 31.28 33.51 35.74 38.00 40.20 44.70 49.10 53.60 58.10 62.60 67 .00 71.50 76.00 80.40 89.40 98.30 107 .20 116.20 125.10 134.00 147 .40 160.80 178.70 192.10 201.10 214.50 227 .90 241.30 259.10 268.10 286.00 312.80 335.10
Test Current IT (mA)
50 50 50 50 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
Maximum Peak Pulse Current Ipp (A)
548.9 490.3 451.9 420.8 392.2 372.0 351.3 328.5 297 .9 277 .9 254.4 235.4 218.1 207 .0 194.2 183.6 174.1 155.4 142.3 130.3 120.2 111.0 104.1 94.8 87 .1 78.3 72.9 69.4 65.4 61.4 58.0 54.0 52.2 49.0 44.8 41.8
Maximum Reverse Leakage IR @ VR ( A)
5000 5000 2000 1000 250 150 50 20 15 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Maximum Clamping Voltage VC @ IPP (V)
36.8 41.2 44.7 48.0 51.5 54.3 57 .5 61.5 67 .8 72.7 79.4 85.8 92.6 97 .6 104.0 110.0 116.0 130.0 142.0 155.0 168.0 182.0 194.0 213.0 232.0 258.0 277 .0 291.0 309.0 329.0 348.0 374.0 387 .0 412.0 451.0 483.0
Agency Approval
X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 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.
20KPA Series
118 Revision: January 09, 2009
(c)2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
Transient Voltage Suppression Diodes
Axial Leaded - 20000W > 20KPA series
Ratings and Characteristic Curves (T =25C unless otherwise notedFigure 1 - Peak Pulse Power Rating Curve
A
Figure 1 - Peak Pulse Power Rating Curve
1000
Figure 2 - Pulse Derating Curve
100 Peak Pulse Power (PPP) or Current (IPP) Derating in Percentage %
PPPM- Peak Pulse Power (KW)
100
80
60
10
40
1
20
0.1 0.000001
0 0 25 50 75 100 125 150 175 200 TA-Ambient temperature (C)
0.00001
0.0001
0.001
td- Pulse Width (Sec.)
Figure 3 - Pulse Waveform
150
IPPM- Peak Pulse Current, % IRSM tr=10sec Peak Value IPPM
Figure 4 - Typical Junction Capacitance
Cj, Junction Capacitance (pf)
TJ=25C Pulse Width(td) is defined as the point where the peak current decays to 50% of IPPM
Bi-directional V= OV
10000
Uni-directional V= OV
100
Uni-directional @ VR
Half Value IPPM IPPM
2
()
10/1000sec. Waveform as defined by R.E.A
100
Bi-directional @ VR
50
Tj=25C f=1.0MHz Vsig=50mVp-p
0
td
1 1.0 2.0 t-Time (ms) 3.0 4.0 0 50 100 150 200 250 300 350 VBR - Reverse Breakdwon Voltage (V)
0
Figure 5 - Steady State Power Derating Curve
Figure 6 - Maximum Non-Repetitive Peak Forward Surge Current
450
IFSM, Peak Forward Surge Current (A)
9
Steady State Power Dissipation (W)
8 7 6 5 4 3 2 1 0 0 25 50 75 100 125 150 175 200
TL- Lead Temperature (C)
L = 0.375" (9.5mm) Lead Lengths
400 350 300 250 200 150 100 50 0 1 10
Number of Cycles at 60 Hz
100
(c)2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
119 Revision: January 09, 2009
20KPA Series
20KPA Series
Transient Voltage Suppression Diodes
Axial Leaded - 20000W > 20KPA series
Soldering Parameters
Reflow Condition - Temperature Min (Ts(min)) Pre Heat - Temperature Max (Ts(max)) - Time (min to max) (ts) Average ramp up rate (Liquidus Temp (TL) to peak TS(max) to TL - Ramp-up Rate Reflow - Temperature (TL) (Liquidus) - Time (min to max) (ts) 260+0/-5 C 3C/second max 3C/second max 217C
25C t 25C to Peak
TP
tp
Ramp-up Critical Zone TL to TP
150C
Temperature (T)
TL Ts(max)
200C
tL
Ramp-down
Ts(min) ts
Preheat
Time (t)
Peak Temperature (TP) Time within 5C of actual peak Temperature (tp) Ramp-down Rate Time 25C to peak Temperature (TP) Do not exceed
Flow/Wave Soldering (Solder Dipping)
6C/second max 8 minutes Max. 280C Peak Temperature : Dipping Time : Soldering : 265OC 10 seconds 1 time
Physical Specifications
Weight Case Polarity Terminal 0.07oz., 2.5g P600 molded plastic body over passivated junction. Color band denotes the cathode except Bipolar. Matte Tin axial leads, solderable per JESD22-B102D.
Environmental Specifications
Temperature Cycle Pressure Cooker High Temp. Storage HTRB Thermal Shock JESD22-A104 JESD 22-A102 JESD22-A103 JESD22-A108 JESD22-A106
Dimensions
D C A A
P600
Dimensions A B C D
Inches Min 1.000 0.340 0.048 0.340 Max 0.360 0.052 0.360
Millimeters Min 25.40 8.60 1.22 8.60 Max 9.10 1.32 9.10
B
20KPA Series
120 Revision: January 09, 2009
(c)2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
Transient Voltage Suppression Diodes
Axial Leaded - 20000W > 20KPA series
Part Numbering System
20KPA xxx XX X
OPTION CODE: BLANK Reel Tape -B Bulk Packaging TYPE CODE: A Uni-Directional (5% Voltage Tolerance) CA Bi-Directional VOLTAGE CODE (Refer to the Electrical Characteristics table) SERIES CODE
Part Marking System
Cathode Band
20KPAXXX
F
Littelfuse Logo Product Type
Packaging
Part Number 20KPAxxxXX 20KPAxxxXX-B Component Package P600 P600 Quantity 800 500 Packaging Option Tape & Reel BULK Packaging Specification EIA STD RS-296E Littelfuse Concord Packing Spec. DM-0016
(c)2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
121 Revision: January 09, 2009
20KPA Series
20KPA Series

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