Enclosed Pre-Wired Relay, Coil Voltage 24V AC/DC, 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 24V AC/DC, NEMA Enclosure Rating 1, Body Depth 1.8 in, Body Height 1.8 in, Body Width 3.2 in, Contact Material Gold Flashed Silver Cadmium Oxide, For Use With Exhaust Fans, Motors, Vacuums, Frequency 50/60 Hz, Horsepower @ 120V AC 1 hp