The COMPRESSOR DEFENDER® surge protector is the only all-in-one undervoltage and surge power protection device on the HVAC Market, providing protection for central A/C and heat pump condensing units and their associated motors, controls and components—both electronic and mechanical. It can be installed inside the condensing unit or externally on the outdoor A/C disconnect. Autosense voltage technology protects at any voltage from 120-240 VAC, making it an ideal solution for residential or light commercial installations. Trusted, state-of-the-art TPMOV® (Thermally Protected Metal Oxide Varistor) surge protection technology eliminates the potentially hazardous failure modes that are associated with standard MOV technology. The device is also designed with integrated 3-minute short cycle time delay protection. Intermatic® Compressor Defender™ Surge Protective Device, 24 A, 120/240 VAC Electrical Rating, 60 Hz Frequency, 20 kA Short Circuit, 24 A Peak Surge Current, 10 kA Nominal Discharge, Modes of Protection: L-L/L-G/L-N, LED Indicator, 1 ph, Environmental Conditions: -40 to 158 deg F Operating Temperature, NEMA 1/2/3/3R Enclosure, Rigid Mounting, 106.4 mm H Dimensions FEATURES Auto-sense voltage technology Quick-reacting, 5-line cycle undervoltage response time 24 VAC/VDC, 2 A control thermostat output SPECIFICATIONS Dimensions : 106.4 mm H Electrical Ratings : 24 A, 120/240 VAC Enclosure Type : NEMA 1/2/3/3R Environmental Conditions : -40 to 158 deg F Operating Temperature Frequency Rating : 60 Hz Indicator Type : LED Modes of Protection : L-L/L-G/L-N Mounting Type : Rigid Nominal Discharge Current : 10 kA Peak Surge Current : 24 A Phase : 1 Short Circuit Current Rating : 20 kA