Sujet : Re: heating a cap
De : joegwinn (at) *nospam* comcast.net (Joe Gwinn)
Groupes : sci.electronics.designDate : 04. Oct 2024, 01:05:54
Autres entêtes
Message-ID : <aacufj9mol9mc65953nel4fah9q83qpec3@4ax.com>
References : 1
User-Agent : ForteAgent/8.00.32.1272
On Thu, 03 Oct 2024 16:36:24 -0700, john larkin <
jl@glen--canyon.com>
wrote:
I got a small (under 1" long) aluminum electro cap, 220 uF 63v, and
cranked up the voltage. It started drawing a bunch of current at 105
volts, got hot, and folded back to 80 mA at 87v.
>
It got too hot to touch in a couple of minutes, after roughly 500
joules. Freeze spray let it go back up to 100 volts or so.
>
None of that seemed to damage it, so an electrolytic cap sort of has a
built-in MOV.
X-Ray it?
Joe