So I finally got my thermocoupler to complete my RIMS system and was testing it's capabilities. I was amazed at how hot the SSR heat sink was getting, running constantly. I don't know the life span of these things, but thought THAT can't help it. So I remembered the salvage computer I had that I got the power supply fan and neodemyte magnets for my stir plate. I also saved the CPU heat sink/fan. So I grabbed it, hooked it up to a phone charger, attached to SSR heat sink and plugged it in. Man did it make a difference. The SSR heat sink went from hot to touch to cool in a few minutes. Might not be necessary but thought I would share. Cheers!