Re: Geek .15uF caps Was: "plate" capacitors

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Knaack by way of Terry Fritz <twftesla-at-uswest-dot-net>" <dknaack-at-rdtech-dot-com>

From: "Tesla list" <tesla-at-pupman-dot-com>
> Polypropylene is a soft low temperature plastic that does not like heat at
> all.  85C is the limit although they play a few games to get that as high
> as 105C.  One should not run them with the outside temperature getting
much
> over 10C above the air temperature.  Even thought the cap is say 40C on
the
> outside, the poly film is a very good insulator so the heat generated in
> the center gets traps and the middle may be cooking at 110C where it melts
> and fails.

What is the minimum operating temperature for a polypropylene cap?

If cooled to its minimum operating temp, could the cap be made to
process significantly more power without damage?

That is, could the power limit be shifted from the thermal limitation
of the dielectric to the current capacity of the lead-plate bond?

DK