Schneider Electric 8501-X0-21S1 Lighting Contactor

Schneider Electric's Square D 8501-X0-21S1 Lighting Contactor (also cataloged as 8501-X0-22S1) is a compact NEMA-style switching device in the Square D 8903 Type L lighting contactor family, designed to remotely control lighting loads in commercial and industrial control circuits. It is powered by a 120 V, 60 Hz control coil, providing the core function of energizing the contact set to switch a lighting circuit on or off, with a footprint suitable for panelboard installations, signage lighting, and building automation applications. As part of the Type L multipole lighting contactors, the 8903 class covers various pole configurations to fit different lighting-load requirements while maintaining rugged, purpose-built construction for lighting duty. The 8501-X0-21S1 and 8501-X0-22S1 variants share the same electrical intent and physical form, both validating 120 VAC coil compatibility; when selecting this device, confirm the enclosure compatibility and pole-count needs to ensure reliable operation within your lighting-control system.