Subject: Re: Explosions in electronics.
Date: Mon, 30 Sep 2002 15:18:39 -0500
Organization: Lucent Technologies, Indian Hill
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
I have seen tantalums which were installed backwards burst into a very
pretty blue/green flame.
"M. Adam Davis" wrote in message
> Essentially it's like popcorn. The voltage gets too high and arcs
> through the electrolyte, or boils the electrolyte, etc.
> I bet your can didn't disintigrate though. You'll be cleaning up the
> shop years later and you'll find it. Trust me.
> I once had a PC power supply fail catastrophically, destroyed
> everything in the case except (thank goodness) the HD. Replaced the
> HD for good measure.
> When I disassembled the supply I found a cap can embedded sideways
> into a screw. They have a lot of power when they go off, and you
> wouldn't have seen it unless you had a nice high speed camera
> On Sat, 28 Sep 2002 08:39:19 +0000 (UTC), Ian Stirling
> >Having just (after noticing that the -5V and -12V rails were very
> >noisy on my PC, (500mv switching noise(I earlier replaced all the other
> >output caps, after finding they had dried out)) I replaced the smoothing
> >capacitors with tantalum electrolytics from the junk box. (tested for
> >ESR and voltage).
> >A little while later, a really loud bang occurred, and I now can't find
> >the steel case of the capacitor :)
> >What is the mechanism for the explosion?