ECN Forum Forums General Topics of the Trade General Discussion Area Has anyone used these?

I just used a solid state unit from Carlo-Gavazzi (#RN1A23A25E) for $56.00. It is a 1 pole device rated for 25A @ 230VAC, the control voltage is 24-230VAC/DC. As long as you provide a 2 pole disconnect and OCPD you can use a 1 pole device for the temperature control.

A problem with solid state devices is the lack of a true off position like you would get with the mercury relays.