6CWQ04FN
Bulletin PD-20527 rev. H 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
110
115
120
125
130
135
140
145
150
155
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
DC
Allowable Case Temperature - (°C)
F( A V )
see note (2)
Average Forward Current - I (A)
Sq ua re wave (D = 0.50)
80% Rated V applied
R
0
0.5
1
1.5
2
2.5
3
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
DC
Avera g e Powe r Loss - (Wa tt s)
F(AV)
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)
10
100
1000
10 100 1000 10000
FSM
Non-Repetitive Surge Current - I (A)
At Any Rated Load Condition
And With Rated V Applied
Follow ing Surg e
RRM
p
Sq ua re Wa ve Pulse Dura t io n - t (m ic rosec )
