Question

why some transistors required heat sink​

Answer 1

Answer:

Transistor junction temperature has to be maintained below 150 degrees Celsius for its safe operation. If excessive power dissipation happens in the transistor, its junction temperature can rise to eventually kill the device. This is where heat sink comes into the picture.

A heat sink absorbs and efficiently transfers heat from transistor to surrounding which brings down its temperature. To achieve this, the heat sinks are made up of thermally conductive metal with many fins which increases its surface area to increase the rate of heat transfer to the surrounding.

Explanation:

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