On 2013-06-29 21:08:41 +0200, said:

I recently replaced a couple of electrolytics in a flat screen TV for a cus
tomer. The caps were in the power supply and were of course rated for 105 d
egrees C. So this brought to mind a question. Could this possibly be an ope
rating temperature? Or is it a storage temperature? Or perhaps it's an int
ernal temperature? It would seem like it would have to be a very high frequ
ency component to ever cause an electrolytic to ever approach anything like
this. Could one of these parts rated as such actually get this hot and rem
ain operational? Would this actually be within prudent design parameters fo
r the device? In theory if the caps are not actually operating at even 85 d
egrees C then why wouldn't you be able to use a lower rated temperature cap
for that application?

It would seem to me that if a piece of equipment were designed to run a cap
acitor that hot or even at 85 degrees C for whatever reason then in my mind
that would certainly constitute a very poor design. I have been repairing
TV's for many years and the only capacitors I've ever seen get too hot to
touch were bad ones. Could someone please explain this rating to me? Thanks
, Lenny

105 deg is the maximum operating temperature before the capacitor
starts to dry
and loose capacity.
--
----------
Kripton

the ESR Repository @ http://kripton2035.free.fr/esr-repository.html
the Geiger Repository @ http://kripton2035.free.fr/geiger-repositor.html