Zoran Brlecic wrote:
Tony Hwang wrote:

In general, electrolytic capacitors should be operated not terribly
much
below their ratings.


I am curious: where did you hear this and what is the rationale? I've
never heard anything similar before, although I suppose it is possible.


In capacitor size/working voltage rating. I won't put lower
WV one, if in the case of filter cap. also I won't put lower value.
Anyhow, this type caps have wide tolerance in general.


Tony, the issue is using an electrolytic cap not much *below* its
voltage rating, not using it above its maximum voltage. For example, a
cap rated 200V should, according to the poster, be used in the 150-200V
range, and not in the low voltage applications, like 12V or 24V.
This is what I asked about, since I'd never heard it before. Of course,
in practice, this is really a non-issue due to the physical size of the
caps, so no sane person will replace a 15V cap with a 450V one, at least
not on a permanent basis.

73 ... WA7AA




Hi,
There is a reason for that cosidering how this type caps work.
Putting in a 200WV cap in a 15WV application is not a good idea.
Tony