SSR-25AA Solid State Relay AC to AC (Input 80-250V AC Output 24-380V AC) with Heat Sink, 25A

This controller works perfectly. I made the mistake of ordering the AA model meaning I had to provide AC voltage to switch the relay on. Ooooooops. I really needed the AD version to switch AC using 5v DC logic. I had a spare relay on hand to switch the AC on/off.

Exactly as advertised. Shipped fast enough, packaged well enough and works fine.I used this to run my well pump using a 110V trigger from an electronic pressure switch unit. I wanted to use this to power the well pump as it will be more bullet proof on the amperage running the well pump, though the well pump is only at 4.5 amps. If you have a heavy amp draw you might consider adding a little computer fan to the heat sink and make it more bullet proof to heat. Good little unit, good price and very handy.

Didn’t last. Not worth buying.

I'm using it for an HVAC booster fan. I used an AC circuit off my Carrier furnace meant for an air purifier to trigger the relay. Don't even consider using the circuit directly you may blow a very expensive control board.

Relay on my furnace went out and they wanted $400 to come fix it this thing solved my problem! Cheers!

This unit was purchased to control a 20 amp rated heater which doesn't really draw that much. Even though it was being operated below its stated current rating with the heatsink in place, this unit failed after a couple of months. Failure mode was severe overheating resulting in the unit going up in flames. Fortunately circuit breakers tripped before any damage occurred. If you must have a solid state relay, I recommend getting one with a current rating much higher (at least 50%) than your requirements. Better yet, for such high current requirements, there are actual physical relay units available that should be more reliable.

Easy installation. The relay in the thermostat makes more sound than the SSR-25AA

The relay worked as per designed. I am using it for a heater control. Works perfectly!