HVAC Relays

Relays for HVAC control circuits in three families: general-purpose switching relays, potential relays for compressor start circuits, and time delay relays. Contact configurations across the range include SPDT, DPDT, SPST, DPST, SPNO and 1NO/1NC, with ratings from 8 to 50 amp at 24, 120 and 240 V.

Potential relays are the ones to get exactly right. They are matched to the compressor's start winding, so a 35 amp part is not a drop-in for a 30 amp part unless the pick-up and drop-out voltages match as well — check the equipment, not just the amperage. The potential relays here are 30 and 35 amp. Time delay relays cover SPST, SPDT and DPST at 24 VAC. Brands include TRADEPRO, MARS, Supco, RIB, resideo, ICM Controls, White-Rodgers and GE.