MBRA140TR
Bulletin PD-20582 rev. C 03/03
4
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Fig. 4 - Maximum Average Forward Current
Vs. Allowable Lead Temperature
Fig. 5 - Maximum Average Forward Dissipation
Vs. Average Forward Current
Fig. 6 - Maximum Peak Surge Forward Current Vs. Pulse Duration
10
100
10 100 1000 10000
FSM
Non-Repetitive Surge Current - I (A)
p
Square Wave Pulse Duration - t (microsec)
At Any Rated Load Condition
And With Rated V Applied
Fo llo win g Surg e
RRM
(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
0
0.2
0.4
0.6
0.8
1
1.2
1.4
0 0.4 0.8 1.2 1.6 2 2.4
DC
Average Power Loss - (Watts)
F( AV )
RMS Lim it
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forward Current - I (A)
Average Forward Current - I
F(AV)
(A)
Allowable Lead Temperature (°C)
70
80
90
100
110
120
130
140
150
160
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
DC
Square wave (D = 0.50)
Rated Vr applied
see note (2)
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
