12CTQ... Series
4
Bulletin PD-20554 rev. B 07/01
www.irf.com
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
(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
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0246810
DC
Average Power Loss - (Watts)
F(AV)
RMS Limit
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
Average Forw ard Current - I (A)
150
155
160
165
170
175
0246810
DC
Allowable Case Temperature - ( C)
F(AV)
see note (2)
Square wave (D = 0.50)
80% Rated V applied
R
Average Forward Current - I (A)
100
1000
10 100 1000 10000
FSM
p
Non-Repetitive Surge Current - I (A)
Square W ave Pulse Duration - t (m icrosec)
At Any Rated Load Condition
And With Rated V Applied
Follow in g Surg e
RRM
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SW ITCH
IRFP460
L
DUT
Rg = 25 ohm
Vd = 25 Volt
+
