A silicon power transistor is operated with a heat sink HS-A=1.5¬¨¬ – McqOptions

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1.	A silicon power transistor is operated with a heat sink H_S-A=1.5¬¨¬®‚Äö√†√ªC/W. The transistor rated at 150W (25¬¨¬®‚Äö√†√ªC) has H_J-C=0.5¬¨¬®‚Äö√†√ªC/W and the mounting insulation has HC-S=0.6¬¨¬®‚Äö√†√ªC/W. What maximum power can be dissipated if the ambient temperature is 40¬¨¬®‚Äö√†√ªC and (T_J)MAX=200¬¨¬®‚Äö√†√ªC?$
A.	70.6W
B.	61.5W
C.	37.8W
D.	56.9W
Answer» C. 37.8W

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