I have a bad situation - which I am trying to determine the effect
of on long term reliability.  We have some aluminum electrolytics
rated for 6.3 volts, which have about twice that voltage on them.

I am looking for a model which can be used to predict the life
of the parts.  I found a reference on this list to a "third power
of the ratio to actual and rated voltage" which seems to be
the best model I have found so far (thanks Ralph Hersey).

Our testing shows that the parts are not going to fail immediately
as we have burn in results with over 1K hours and no failures.

The "formation" voltage for these parts is 16 volts and we start to
see immediate failures around 21 volts.

Since we probably aren't the first people to have made this type of
mistake, I am curious if anyone has any experiences they can share?

Since this is double the voltage, the "power of 8" model predicts a
reduction of life by 256 times - which would predict a pretty short
life!

Larry Tyree
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