MBRS320
Bulletin PD-20645 rev. D 03/03
155
Allowable Lead Temperature (°C)
Allowable Power Loss (Watts)
1.6
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
150
145
140
135
130
Square wave
125
see note (2)
120
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
RMS Limit
DC
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Maximum Average Forward Current
Vs. Allowable Lead Temperature
1
2
3
4
5
Average Forward Current - I
F(AV)
(A)
Fig. 6 - Maximum Average Forward Dissipation
Vs. Average Forward Current
FSM
(A)
1000
Tj = 25˚C
Non-Repetitive Surge Current - I
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. 7 - 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)
4
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