Electronic Devices and Circuits - Engineering

Q1:

The derating factor for a BJT transistor is about

A 0.5 mW/°C

B 2.5 mW/°C

C 10 mW/°C

D 25 mW/°C

ANS:B - 2.5 mW/°C

For every 1°C rise in ambient temperature the power dissipation must be reduced by 2.5 mW so that transistor is safe.