C&H Technology 242NQ030PbF - Manual (Page 5)

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4 Revision: 28-Apr-08
242NQ030PbF
Vishay High Power Products Schottky Rectifier, 240 A
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current
Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
Fig. 8 - Unclamped Inductive Test Circuit
Note
(1) Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward power loss = I
F(AV)
x V
FM
at (I
F(AV)
/D) (see fig. 6);
Pd
REV
= Inverse power loss = V
R1
x I
R
(1 - D); I
R
at V
R1
= Rated V
R
Allowable Case Temperature (°C)
I
F(AV)
- Average Forward Current (A)
0 300 350 150
100
120
130
140
150
160
100 250
DC
See note (1)
Square wave (D = 0.50)
80 % rated V
R
applied
110
50 200
0
Average Power Loss (W)
I
F(AV)
- Average Forward Current (A)
0 150 250 350
50
100
150
200
50 300
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
DC
RMS limit
100 200
I FSM
- Non-Repetitive Surge Current (A)
t
p
- Square Wave Pulse Duration (µs)
1000
100 000
10 100 1000 10 000
At any rated load condition
and with rated V applied
following surge
RRM
10 000
Current
monitor
High-speed
switch
D.U.T.
R
g
= 25 Ω
+
Freewheel
diode
V
d
= 25 V
L
IRFP460
40HFL40S02