Datasheet

MBR735/ MBR745, MBRB735/ MBRB745
Bulletin PD-2.325 rev. E 01/03
4
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
(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
= rated V
R
Average Forward Current - I
F(AV)
(A)
Allowable Case Temperature (°C)
Average Forward Current - I
F(AV)
(A)
Average Power Loss (Watts)
Square Wave Pulse Duration - t
p
(microsec)
Non-Repetitive Surge Current - I
FSM
(A)
100
1000
10 100 1000 10000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
120
130
140
150
024681012
DC
see note (2)
Square Wave (D = 0.50)
Rated Vr Applied
0
1
2
3
4
5
6
7
0 2 4 6 8 10 12
DC
RMS Limit
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20