Square D by Schneider Electric Class 8903 four-pole lighting contactor with a 120 V AC coil is designed to switch lighting circuits in panelboards. It uses four Form A normally open contacts (4PST-NO) and is rated for 30 A per pole at 120 VAC, suitable for commercial lighting loads. Variants are available in chassis-mount or DIN-rail configurations, and the Class 8903 family is intended for panelboard mounting and compatibility with Square D panel systems.
