SM8S Series
Vishay Semiconductors
formerly General Semiconductor
Ratings and
Characteristic Curves
(T
A
= 25°C unless otherwise noted)
Power Derating Curve
8.0
6,000
Load Dump Power Characteristics
(10ms Exponential Waveform)
5,000
Power Dissipation (W)
6.0
Load Dump Power (W)
4,000
3,000
2,000
4.0
2.0
1,000
0
0
50
100
150
200
0
25
50
75
100
125
150
175
Case Temperature (°C)
Case Temperature (°C)
Pulse Waveform
150
T
A
= 25°C
Pulse width (t
d
) is defined as
the point where the peak
current decays to 50% of I
PP
10,000
Reverse Power Capability
Input Peak Pulse Current %
t
r
= 10µs
100
Peak Value I
PP
50
Half Value –
I
PP
2
0
0
t
d
10
20
30
40
Reverse Surge Power (W)
1,000
10
100
Time, ms (t)
Pulse Width (ms) – 1/2 I
PP
Exponential Waveform
Typical Transient Thermal Impedance
100
Transient Thermal Impedance (°C/W)
R
ΘJA
10
1
R
ΘJC
0.1
0.01
0.01
0.1
1
10
100
t – Pulse Width (sec.)
Document Number 88387
04-Jun-04
www.vishay.com
3
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