THis is definitely looking for trouble.

A good snubber can be made from a 10 ohm 1 watt resistor in series with a=
=20
0.1 uF 250V metalized polypropylene capacitor. (assuming 120VAC)   Those=20
values are good guesses, you might have to go higher on the capacitor. =20
DOn't use electrolytics, this is for high frequencies.  Locate the snubbe=
rs=20
as close to the terminals of the relay as you can, across the relay=20
terminals and across the load.

THis device may play havoc with any nearby electronics that is not in a=20
shielded can.  If that is the case, it won't do it every time, making it=20
hard to troubleshoot.


--Lawrence Lile
Electronic Solutions
Project Solutions Compnaies
www.projsolco.com


>
>I was entertaining the idea of using a solid state
>relay to switch on and off a refrigerator compressor.
>The model I am looking at is the ubiquitous s101s05v.
>This thermostat will be controlled by a PIC 18F452.
>
>http://rocky.digikey.com/WebLib/Sharp/Web%20Data/s101s05v.pdf
>
>The existing relay in the thermostat is rated for 3A,
>as is this SSR.
>
>Does anybody have any recommendations for either (a) a
>better SSR relay for the job, or (b) an RC snubber
>design?  This model is not equipped with zero-cross
>circuitry.
>
>TIA,
>Jon
>
>
>
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_________________________________________________________________
FREE pop-up blocking with the new MSN Toolbar =96 get it now!=20
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