This is a Cutler-Hammer C25DNF340A industrial contactor. It's a 3-pole, 40 amp, 480 volt AC unit that's electrically held. Important: The coil is NOT included with this contactor - you'll need to source the correct coil voltage separately (common coil voltages are like 24V, 120V, etc.). It's part of the D1 series, brand new old stock. Great for replacing a worn-out contactor in motor control panels, HVAC systems, industrial machinery, or lighting control. Rated for 20 HP at the specified voltage. It's a heavy-duty, reliable piece of gear from a trusted brand. Make sure the coil voltage matches your control circuit before installing. SKU B300057 (HPM).