ST301S09010 is a relay manufactured by Stancor. It is a heavy-duty, industrial-grade, three-pole, single-throw, double-make relay rated at 30A at 480VAC, 20A at 277VAC, and 10A at 120VAC. It is designed to control heavy-duty loads such as motors, pumps, relays, and capacitors. The ST301S09010 is designed with a coil voltage range of 120VAC to 277VAC and a temperature range of -25°C to +60°C. It has screw terminals for easy connection and a 90-minute mechanical life. It is UL and cUL listed.