"Michael Gray" wrote in message
...
On 26 Aug 2005 11:49:39 -0700, wrote:

The project I am working on will need a relay for a 1/3 to 1/2 hp 240V
pump motor.

Have been trying to do my homework concerning possible solid state
relays to use.

So far the Teledyne S24A25 (zero crossing turn on) and the Crydom
A2425-10 (random turn on) seem quite similar except for the difference
in turn on.

Am wondering how much difference this actually makes?

Welcome any suggestions for these or other suitable solid state relays.

Thanks

Ken

The principal difference is the amount of RF noise that is generated.

And for an inductive load like a motor it's a particularly good idea to use
one with zero crossing.