Transient Voltage Suppression Diodes
Axial Leaded – 20000W > 20KPA series
20KPA Series
Descriptions
Uni-directional
RoHS
Pb
e3
The 20KPA Series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Bi-directional
Features
• 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 I
R
less than 2μA
when V
BR
min>49V
• High temperature
to reflow soldering
guaranteed: 260°C/40sec
/ 0.375” (9.5mm) lead
,
length, 5 lbs., (2.3kg)
tension
• V
BR
@ T
J
= V
BR
@25°C
x (1+
α
T x (T
J
- 25))
(
α
T: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)
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E230531
Maximum Ratings and Thermal Characteristics
(T
A
=25
O
C unless otherwise noted)
Parameter
Peak Pulse Power Dissipation by
10/1000μs Test Waveform (Fig.2)
(Note 1)
Steady State Power Dissipation on
Infinite Heat Sink at T
L
=75ºC
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
P
PPM
P
D
I
FSM
T
J
, T
STG
R
θJL
R
θJA
Value
20
8.0
400
-55 to 175
8.0
40
Unit
kW
W
A
°C
°C/W
°C/W
Notes:
1. Non-repetitive current pulse , per Fig. 4 and derated above T
J
(initial) =25
O
C per Fig. 3.
2. Measured on 8.3ms single half sine wave or equivalent square wave, duty cycle=4 per
minute maximum.
Applications
TVS componants are ideal for the protection of I/O
interfaces, V
CC
bus and other vulnerable circuits used in
telecom, computer, industrial and consumer
electronic applications.
Additional Infomarion
Functional Diagram
Bi-directional
Datasheet
Resources
Samples
Cathode
Uni-directional
Anode
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Transient Voltage Suppression Diodes
Axial Leaded – 20000W > 20KPA series
Electrical Characteristics
(T =25°C unless otherwise noted)
A
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 V
R
(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 V
BR
(Volts) @ I
T
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
MAX
24.57
29.49
31.94
34.41
36.86
39.31
41.80
44.22
49.17
54.01
58.96
63.91
68.86
73.70
78.65
83.60
88.44
98.34
108.13
117
.92
127
.82
137
.61
147
.40
162.14
176.88
196.57
211.31
221.21
235.95
250.69
265.43
285.01
294.91
314.60
344.08
368.61
Test
Current
I
T
(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 I
pp
(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
I
R
@ V
R
(µ 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
V
C
@ I
PP
(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
Recognition
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 V
RWM
of 40 volts and less, the I
R
limit is double.
For parts without A , the V
BR
is ± 10% and V
C
is 5% higher than with A parts.
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Transient Voltage Suppression Diodes
Axial Leaded – 20000W > 20KPA series
I-V Curve Characteristics
Uni-directional
Bi-directional
I
pp
Vc V
BR
V
R
I
R
V
F
I
T
V
Vc V
BR
V
R
I
T
I
R
I
R
I
T
V
R
V
BR
Vc
V
I
pp
I
pp
P
PPM
V
R
V
BR
V
C
I
R
V
F
Peak Pulse Power Dissipation
-- Max power dissipation
Stand-off Voltage
-- Maximum voltage that can be applied to the TVS without operation
Breakdown Voltage
-- Maximum voltage that flows though the TVS at a specified test current (I
T
)
Clamping Voltage
-- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
Reverse Leakage Current
-- Current measured at V
R
Forward Voltage Drop for Uni-directional
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
A
Figure 1 - TVS Transients Clamping Waveform
Voltage Transients
Figure 2 - Peak Pulse Power Rating Curve
1000
Voltage Across TVS
Voltage or Current
P
PPM
-Peak Pulse Power (kW)
100
Current Through TVS
10
1
0.000001
Time
continues on next page.
0.00001
0.0001
0.001
t
d
-Pulse Width (sec.)
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Transient Voltage Suppression Diodes
Axial Leaded – 20000W > 20KPA series
Ratings and Characteristic Curves
(T =25°C unless otherwise noted)
(Continued)
A
Figure 3 - Peak Pulse Power Derating Curve
100
Figure 4 - Pulse Waveform
150
I
PPM
- Peak Pulse Current, % I
RSM
tr=10µsec
Peak Value
IPPM
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
75
100
50
Half Value
IPPM
IPPM
2
( )
10/1000µsec. Waveform
as defined by R.E.A
25
50
0
0
25
50
75
100
125
150
175
200
0
td
T
J
- Initial Junction Temperature (ºC)
0
1.0
2.0
t-Time (ms)
3.0
4.0
Figure 5 - Typical Junction Capacitance
100000
Figure 6 - Typical Transient Thermal Impedance
100
10000
Uni-direc onal V=0V
Bi-direc onal V=0V
Transient Thermal Impedance (°C/W)
10
Cj (pF)
1000
100
Bi-direc onal V=V
R
Bi-direc onal V=V
R
1
10
1
0
50
100
150
200
250
300
350
400
0.1
V
BR
- Reverse Breakdown Voltage (V)
0.01
0.1
1
10
100
1000
TP - Pulse Duration (s)
Figure 7 - Maximum Non-Repetitive Peak Forward
Surge Current Uni-Directional Only
1000
900
Figure 8 - Peak Forward Voltage Drop vs Peak Forward
Current (Typical Values)
IFSM
-
Peak Forward Surve Current (A)
100
3 stacked-die
700
600
500
400
300
200
100
0
1
10
Number of Cycles at 60 Hz
I F - Peak Forward Current(A)
800
10
4 stacked-die
1
0.1
100
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
VF - Peak Forward Voltage(V)
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
Transient Voltage Suppression Diodes
Axial Leaded – 20000W > 20KPA series
Soldering Parameter
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Average ramp up rate (Liquidus Temp (T
A
)
to peak
T
S(max)
to T
A
- Ramp-up Rate
Reflow
- Temperature (T
A
) (Liquidus)
- Time (min to max) (t
s
)
Lead–free
assembly
150°C
Temperature (T)
t
p
Ramp-up
Critical Zone
T
L
to T
P
T
P
200°C
60 –180 secs
3°C/second max
3°C/second max
217°C
60 – 150 seconds
260
+0/-5
°C
20 – 40 seconds
6°C/second max
8 minutes Max.
260°C
T
L
T
s(max)
t
L
T
s(min)
Ramp-down
Preheat
t
s
25˚C
t 25˚C to Peak
Time (t)
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Flow/Wave Soldering (Solder Dipping)
Peak Temperature :
Dipping Time :
Soldering :
265
O
C
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-B102.
Environmental Specifications
High Temp. Storage
HTRB
Temperature Cycling
H3TRB
RSH
JESD22-A103
JESD22-A108
JESD22-A104
JESD22-A101
JESD22-B106
Dimensions
D
A
(for uni-directional products only)
Cathode Band
Dimensions
Inches
Min
1.000
0.340
0.048
0.340
Max
-
0.360
0.054
0.360
Millimeters
Min
25.40
8.60
1.22
8.60
Max
-
9.10
1.36
9.10
C
B
P600
A
B
C
D
A
© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 04/20/18
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