***Please See Reference Photos For More Detail***

The Square D 8903SM010 is an industrial lighting contactor designed to switch large electrical loads such as commercial lighting circuits, motors, or other power equipment. It uses an electrically actuated coil (typically 120 V AC) that, when energized, pulls in the main contacts to supply power to the load, and when de‑energized, opens the contacts to interrupt the circuit. The 8903SM series is built for frequent switching and reliable performance in panelboards, lighting control centers, and industrial control systems. It has multiple poles so it can switch all phases of a three‑phase circuit at once, and it features robust construction for long service life in demanding electrical environments. This type of contactor is commonly found in commercial buildings, factories, and other installations where remote or automatic load control is required.