10BQ040
Bulletin PD-2.397 rev. G 07/04
160
Allowable Lead Temperature (°C)
140
130
120
110
100
Square wave (D = 0.50)
90
Rated Vr applied
80
see note (2)
70
0
0.4
0.8
Average Power Loss (Watts)
150
DC
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
0.8
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
RMS Limit
DC
0.6
0.4
0.2
1.2
1.6
0
0
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 4 - Maximum Average Forward Current
Vs. Allowable Lead Temperature
0.3
0.6
0.9
1.2
1.5
Fig. 5 - Maximum Average Forward Dissipation
Vs. Average Forward Current
Non-Repetitive Surge Current - I
FSM
(A)
1000
100
At Any Rated Load Condition
And With rated Vrrm Applied
Following Surge
10
10
100
1000
10000
Square Wave Pulse Duration - T
p
(Microsec)
Fig. 6 - Maximum Peak Surge Forward Current Vs. Pulse Duration
(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
4
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