30BQ040PbF
Bulletin PD-20407 rev. A 07/04
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
(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
Average Forward Current - I
F(AV)
(A)
Allowable Lead 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)
10
100
1000
10000
10 100 1000 10000
At Any Rated Load Condition
And With Rated Vrrm Applied
Following Surge
70
80
90
100
110
120
130
140
150
160
012345
DC
D=0.20
D=0.25
D=0.33
D=0.50
D=0.75
Square wave (D = 0.50)
80% Rated Vr applied
see note (2)
0
0.5
1
1.5
2
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
DC
RMS Limit
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
