Siemens 3RH1140-1BF40 four-pole power contactor (contactor relay) with four normally open (NO) main contacts and a 110 V DC coil. It is a size S00 unit with screw-terminal connections, designed to switch motor or other high-current loads in automation and control circuits. When the 110 V DC coil is energized, all four NO contacts close, providing four separate switched circuits from a single coil. The compact S00 footprint supports panel mounting in tight control cabinets, and this model is specified as 4NO, 110 VDC coil, 3RH1140-1BF40.
