A silicon power transistor is operated with a heat sink ( = 1.5ºC/W) – McqOptions

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1.	A silicon power transistor is operated with a heat sink ( = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has = 0.5º C/W, and the mounting insulation has = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and T = 200 ºC?
A.	61.5 W
B.	60.0 W
C.	57.7 W
D.	55.5 W
Answer» D. 55.5 W

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