Re: heating a cap

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.

You're not 'heating a cap'.

You're applying voltage overstress to failure, using a
current limited source.

This tells you precisely nothing.

Were you earing safety glasses?

Are you sure you want to advertize this increasingly
erratic behavior?

RL