Download yourself a copy of MIL HDBK 217F and look at the section on
aluminium electrolytic capacitors. There's a nice calculation for MTBF and
it is influenced by, amongst other things, voltage and temperature.
Anything above about 60% rated voltage and 40C ambient will begin to
seriously reduce the life expectancy. I don't have it in front of me, but
you can pick any component you like to do the sums.
The M stands for mean, it's not an absolute, it's a statistical prediction.
It has been said that most aircraft probably shouldn't get off the ground,
but then neither should the bumble bee.
David
G3UNA
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