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From: email@example.com (andy)
Subject: Re: Explosions in electronics.
Date: 30 Sep 2002 15:09:14 -0700
NNTP-Posting-Date: 30 Sep 2002 22:09:14 GMT
"Kevin Aylward" wrote in message news:...
> "Ian Stirling" wrote in message
> > Uwe Zimmermann wrote:
> > >
> > > most probably you either connected the capacitor with reversed
> > > polarity or wrong voltage rating. Electrolytic capacitors
> > > work as reverse biased diodes. If you connect them with reversed
> > > polarity, current can pass through and (a) dissipate heat and (b)
> > > start electrolysis of the electrolyte, releasing gas.
> > > The same happens if you exceed the maximum voltage rating.
> > I know I connected it backwards, as I found the epoxy red plug
> > to the wrong terminal.
> > I suppose it must just be electrolytic gas generation, I was just
> > surprised that the case seems to have fragmented, rather than simply
> > blown out the plug.
> Ahmmm. Well, you obviously didn't play much with electronics stuff when
> you were a kid.
We used to blow Al. Electro's for fun. Nothing like a 10000uF/35V on
the ends of an extension cord plugged into the 240V -> Instant snow.
The best one I've seen though was in a SMPS from an old Unix server.
The explosive force of a reversed electro was large enough to wedge
itself into the metal case of the PSU. The circular impression was
quite visible from the outside of the case.
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