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20KPA28A-B Datasheet(PDF) 3 Page - Littelfuse

Part # 20KPA28A-B
Description  Transient Voltage Suppression Diodes
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Manufacturer  LITTELFUSE [Littelfuse]
Direct Link  http://www.littelfuse.com
Logo LITTELFUSE - Littelfuse

20KPA28A-B Datasheet(HTML) 3 Page - Littelfuse

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©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
Revision: January 09, 2009
20KPA Series
Axial Leaded – 20000W > 20KPA series
Please refer to http://www.Littelfuse.com/series/20KPA.html for current information.
Ratings and Characteristic Curves (T
A=25°C unless otherwise notedFigure 1 - Peak Pulse Power Rating Curve
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
0
25
50
75
100
125
150
175
200
T
A-Ambient temperature (ºC)
1
100
10000
0
50
100
150
200
250
300
350
V
BR - Reverse Breakdwon Voltage (V)
Tj=25C
f=1.0MHz
Vsig=50mVp-p
Bi-direct ional @ 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
0
25
50
75
100 125 150 175 200
L = 0.375” (9.5mm)
Lead Lengths
T
L- Le a d Te mpe rature (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
1
10
100
Number of Cycles at 60 Hz
Figure 6 - Maximum Non-Repetitive Peak Forward
Surge Current
0.1
1
10
100
1000
t
d- Pulse Width (Sec.)
0.000001
0.00001
0.0001
0.001
Figure 1 - Peak Pulse Power Rating Curve


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