Square D LC1D50AU7 3-Phase AC Contactor

LC1D50AU7 TeSys D 3-pole AC contactor, manufactured by Schneider Electric, switches up to 50 A in AC-3 duty for three-phase motor loads and provides three normally open contacts (3PST-NO) for straightforward motor starting and control in industrial automation. It uses a 240 VAC coil (50/60 Hz) to energize the contactor, while the main circuit is rated for up to 440 VAC in AC-3 service and protected by an SCCR up to 100 kA, making it suitable for higher-inrush loads and safety margins in typical panel or DIN rail installations. For performance, Schneider Electric lists a 40 HP rating at 480 VAC with a maximum load of 50 A, and the unit is compatible with DIN rail mounting or panel mounting, with protective-cover variants available to suit harsher environments and ease of enclosure integration. Common applications include starting and stopping three-phase motors in conveyors, pumps, fans, and packaging machinery, where a compact, reliable TeSys D contactor—featuring a standard coil voltage and simple electrical interface—delivers durable operation and predictable control for scalable automation.