Rectorseal RSH-50 Surge Protective Device — Single-Phase 120/240-V HVAC Protector, Black

100% N/a Imported. The Rectorseal RSH-50 is a surge protection device built to guard single-phase, 120/240‑V HVAC equipment — including air conditioning units, heat pumps and ductless mini-split systems — from transient over-voltage and naturally caused surge events. Compact and easy to wire, the RSH-50 fits all single-phase units and provides immediate protection once installed. Suitable for residential or commercial systems, it can be mounted in any position or installed inside an electrical panel box. A built-in LED indicates that the unit is providing proper surge protection, and long-lasting gas discharge tube technology delivers durable suppression performance.