Pp (W)

0.001

0.01

0.1

1

10

100

10

100

1000

10000

100000

tp (mS ) EXPO.

Tj initial = 25˚C

Figure 2 : Peak pulse power versus exponential pulse duration.

0.1

1

10

100

1000

1

10

100

1000

SM4T 6V8A

SM4T 10A

SM4T 22A

SM4T 39A

SM4T 68A

SM4T 150A

SM4T 220A

V(V)

CL

Ipp (A)

t

%Ipp

100

50

0

t r

t< 10

s

r

t

Tj initial = 25˚C

Figure 3 : Clamping voltage versus peak pulse current.

exponential waveform t = 20

µs ________

t = 1 ms ——————-

t =10 ms

...............

Note : The curves of the figure 3 are specified for a junction temperature of 25

°C before surge.

The given results may be extrapolated for other junction temperatures by using the following formula :

For intermediate voltages, extrapolate the given results.

SM4Txx

4/7