RSH-60 VMD Surge Protective & Voltage Monitoring Device that protects HVAC equipment from electrical surges, brownouts, and short cycling. Protects from up to 60,000-amp single surges and up to 20,000-amp repetitive surges. Type 1 Device - can be mounted anywhere in the electrical system. Recommended for residential and commercial use, all split phase 240 VAC outside condensing units and indoor air handlers. Max discharge current per phase - 60kA (1 hit survivability). Nominal discharge current - 20kA (15 hits survivability). Short circuit current - 200kA. Uses long-lasting gas discharge tube technology and TFMOV (thermally fused metal oxide varistor) technology. Features dual LEDs, and audible alarm with silence switch; green LED easily indicates protection. Utilizes 24V thermostat relay, voltage monitoring circuit, 3 minute power restore delay to prevent short cycling, and hybrid gas discharge tube/metal oxide varistor (MOV) protection circuit. NEC's highest short circuit current rating (SCCR) @200kA, UL 1449 listed, and RoHS compliant. Includes mounting feet for stability.