On 27/10/16 12:28, Bob Minchin wrote:
I wonder why it is killing fets from time to time? is it when the lamp
fails or at other times? - Inrush current issues?

FETS are remarkably resilient. But mains voltage spikes might be an
potential killer.

Or sheer heat.

However semicondictors do age, and the hotter they are the faster they age

http://spectrum.ieee.org/semiconduct...ansistor-aging

You do need a basic understanding of the quantum mature of transistors
to understand WHY they age though ;-)


--
All political activity makes complete sense once the proposition that
all government is basically a self-legalising protection racket, is
fully understood.