[ale] [Slightly OT] What IS this electrical Component?

coverturtle coverturtle at gmail.com
Sat Dec 29 13:46:57 EST 2012


Neal,

Your assessment is correct, more or less. It protects from overload.  I 
found a similar item
in a motor on an attic exhaust fan. I called around and found a fellow 
that knew exactly what
it is.  He said it's just a cheap (solid-state) fuse that makes money 
for repair techs and manufacturers.

All I needed to do was to replace it with a reasonable amp rated fuse in 
a replaceable fuse
holder.  Fuse holder cost me $5; already had a fuse.  New motor would 
have cost me $60.

IMO, you can safely replace the device on the transformer with an 
appropriate fuse.
That's not from expertise so much as it is from experience.  Any fuse 
will blow if its
temperature is too high.  The transformer is fixable!  :)

Jon Kettenhofen


On 12/29/2012 12:46 PM, Neal Rhodes wrote:
> http://flic.kr/p/dFrXah should be a picture of the innards of a 120VAC 
> to 24VAC wall wart.
>
> Which is somewhat obscure, and is now farschtunken.   (zero output)
>
> The big clue is infinite resistance across the 120V side.
>
> Tearing it apart, I'm seeing about 80 ohms across the primacy coil, 
> and this little black thing, which shows infinite resistance both ways.
>
> I may just end up getting a replacement adapter, cutting off the 
> cable, and splicing on the obscure connector, but I'm curious what 
> this thing is.
>
> Writing on it says:
>
>     AUPO (rombus shape with some letters inside)
>     A 2-1 A-F jet
>     115<degrees-symbol>C  R1
>
> If I had to guess, then I'd guess it's some kind of thermal protection 
> device that is normally conducting straight through, but opens up at 
> 115 degrees to protect from overload?
>
> Any thoughts on what this is, and if one could obtain a replacement 
> part somewhere?
>
> Regards,
>
> Neal
>
>
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