12CWQ04FN
Bulletin PD-20546 rev. I 05/06
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
(2) Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/ D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
115
120
125
130
135
140
145
150
155
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DC
Allowable Case Temperature - (°C)
F( A V )
se e note (2)
Sq ua re wa ve (D = 0.50)
80% Rated V applied
R
Average Forward Current - I (A)
0
1
2
3
4
5
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DC
Average Power Loss - (Watts)
F( A V )
RM S Li m it
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Current - I (A)
Square Wave Pulse Duration - t
p
(microsec)
Non-Repetitive Surge Current - I
FSM
(A)
10
100
000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
