SSR's

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jasongetsdown

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They're all over the place. Just do a google shopping search. Ebay, Amazon, digi-key, every industrial supply company (Mcmaster, MSC, Grainger), they've all got them.
 

Squeeky

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Also I would recommend going all 40A, even if you only need 25A as it will reduce heat.
 

Rbeckett

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I bought a bunch of 25 and 40's on Ebay. Took a couple of weeks but got a great deal and good parts. The ones I got have zero cross sensing, an LED for power on and an extremely low leakage current. I use a diode ("Freewheeling") on everything across the loads Pos and Neg to prevent spikes. size the freewheeling diode appropriately and your golden. I think all told I spent 35 Bucks on 8 SSR's, 5-20 A and 3-40A. I also found some really nice relay boards with 4-5 volt coils capable of [email protected] Pretty much got switching covered.
Bob
 
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I bought a bunch of 25 and 40's on Ebay. Took a couple of weeks but got a great deal and good parts. The ones I got have zero cross sensing, an LED for power on and an extremely low leakage current. I use a diode ("Freewheeling") on everything across the loads Pos and Neg to prevent spikes. size the freewheeling diode appropriately and your golden. I think all told I spent 35 Bucks on 8 SSR's, 5-20 A and 3-40A. I also found some really nice relay boards with 4-5 volt coils capable of [email protected] Pretty much got switching covered.
Bob
Maybe I'm misunderstanding you here but 1) don't want a snubber on the load side of an AC SSR or relay. Maybe you mean you're referring to DC loads, or on the control side of the switches.

Also, I don't see an advantage in a snubber on the control side of an SSR, but certainly there should be one on the control / coil side of the relay.

Cheers!
 
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