The Square D 8903LX020 is a mechanically held lighting contactor from the 8903LX series designed for commercial and industrial lighting control. It features a 2-pole design with two normally open contacts and is rated for 30 amps at up to 600 VAC, making it suitable for switching moderate lighting loads. The LX designation indicates a mechanically held operating mechanism, meaning the contactor stays closed once actuated until power to the coil is removed. It uses screw-clamp terminals for secure wiring and reliable connections. This contactor is commonly used in lighting panels for warehouses, parking lots, and other large building lighting systems.