12CTQ... Series
Bulletin PD-20554 rev. C
07/06
175
Allowable Case T
emperature - (°C)
Average Power Loss - (Watts)
5
4.5
170
4
3.5
3
2.5
2
1.5
1
0.5
4
6
8
10
0
0
2
4
6
8
10
RMSLimit
DC
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
165
DC
160
S uare wa ve (D = 0.50)
q
80% Rated V a pplied
R
155
see note (2)
150
0
2
Average Forward Current - I
F(AV)
(A)
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Non-Repetitive S
urge Current - I
FS
(A)
M
1000
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following S
urge
100
10
100
1000
10000
S
quare Wave Pulse Duration - t p (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-S
PEED
S CH
WIT
FREE-WHEEL
DIODE
40HF
L40S
02
+
DUT
IR
FP460
R = 25 ohm
g
Vd = 25 Volt
CURR
ENT
MONIT
OR
Fig. 8 - Unclamped Inductive Test Circuit
(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
4
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