The Schneider Electric (Square D) SDSA1175 Secondary Surge Arrester is a high-performance device designed to protect electrical systems from transient voltage surges. Engineered for residential, commercial, and light industrial applications, it safeguards sensitive equipment against damaging power surges caused by lightning or switching events. https://www.partshnc.com/sdsa1175-schneider-electric-square-d-secondary-surge-arrester