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The Natural Philosopher[_2_]

On 22/12/17 15:18, wrote:
FWIW silicon devices are often specced to give claimed P_diss at unrealistic case temps, I wouldn't assume any better for other components.

Indeed. But that is not a true usbale 'rating' - that is a measure of
chip to case thermal conductivity.

There is no other way to specify it for a power transistor bolted to a
heat sink of unknowable thermal resistance in an equally unknowable
ambient airflow.

--
Socialism is the philosophy of failure, the creed of ignorance and the
gospel of envy.

Its inherent virtue is the equal sharing of misery.

Winston Churchill