DNB61
60
I
2
t = Î
2
x t
2
50
Peak half sine forward current - (kA)
0.1
V
R
= 50% V
RRM
6
Anode side cooled
Thermal impedance - (˚C/W)
40
5
I
2
t value - (A
2
s x 10
6
)
0.01
Double side cooled
30
4
20
I
2
t
10
3
0.001
Conduction
2
d.c.
Halfwave
3 phase 120˚
6 phase 60˚
Effective thermal resistance
Junction to case ˚C/W
Double side
0.0130
0.0141
0.0170
0.0200
Anode side
0.0250
0.0261
0.0290
0.0320
0
1
ms
10
1
2 3
5
10
20
1
50
0.0001
0.001
0.01
0.1
1
Time - (s)
10
100
Cycles at 50Hz
Duration
Fig.4 Surge (non-repetitive) forward current vs time (with
50% V
RRM
at T
case
175˚C)
Fig.5 Maximum (limit) transient thermal impedance -
junction to case
5/7
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