Enclosed Pre-Wired Relay Coil Voltage 277V AC Contact Form DPST-NO Current Rating 30 A Mounting Style Surface Nipple Size 0.50 in NPT Contact Rating (AC) 15 A @ 600V 20 A @ 277 to 480V 30 A @ 300V Contact Rating (DC) 25 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 Silver Alloy For Use With Exhaust Fans Motors Vacuums Frequency 50/60 Hz Horsepower @ 120V AC 1 hp Horsepower @ 240V AC 2 hp