Path: ...!3.eu.feeder.erje.net!feeder.erje.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Clive Arthur <clive@nowaytoday.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: heating a cap
Date: Sat, 5 Oct 2024 13:20:51 +0100
Organization: A noiseless patient Spider
Lines: 21
Message-ID: <vdrav6$ojl5$1@dont-email.me>
References: <e0aufj92e8200qiirc12bdnocsf1ertiut@4ax.com>
Reply-To: clive@nowaytoday.co.uk
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Sat, 05 Oct 2024 14:20:54 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="215d16f2f50db1b575039d56f562471c";
	logging-data="806565"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19F+l6C2n7PkLMcvFBA8xmKogIcvM2pc8A="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:yF+Kb6j1vW+we7qHJQ9EAbGDbY8=
Content-Language: en-GB
In-Reply-To: <e0aufj92e8200qiirc12bdnocsf1ertiut@4ax.com>
Bytes: 1719

On 04/10/2024 00:36, john larkin 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.
> 

If you need a high temperature cap, these work and they're not horribly 
expensive...

https://www.mouser.co.uk/datasheet/2/40/THJ-3165556.pdf

-- 
Cheers
Clive