Enclosed Pre-Wired Relay Coil Voltage 277V AC Contact Form DPDT Current Rating 20 A Mounting Style Surface Nipple Size 0.50 in NPT Contact Rating (AC) 15 A @ 600V 20 A @ 277 to 480/300V Contact Rating (DC) 20 A @ 28V Input Voltage 208 to 277V AC NEMA Enclosure Rating 1 Body Depth 1.8 in Body Height 4 in Body Width 4 in Contact Material Gold Flashed Silver Cadmium Oxide For Use With Exhaust Fans Motors Vacuums Frequency 50/60 Hz Horsepower @ 120V AC 1 hp