Power Transistors
PC — Ta
100
(1) TC=Ta
90
(2) With a 100 × 100 × 2mm
Al heat sink
80
(3) Without heat sink
70
(1)
60
50
40
30
20
(2)
10
(3)
0
0 20 40 60 80 100 120 140 160
Ambient temperature Ta (˚C)
Area of safe operation, horizontal operation ASO
35
f=64kHz, TC<90˚C
Area of safe operation with
30
respect to the single pulse
overload curve at the time of
switching ON, shutting down
25
by the high voltage spark,
holding down and like that,
during horizontal operation.
20
15
10
5
<1mA
0
0
500
1000 1500 2000
Collector to emitter voltage VCE (V)
2SC5478
2