The Havells 3 Phase 4-Pole AC Surge Protection Device (SPD) is ideal for three-phase electrical distribution boards, industrial control panels, commercial buildings, and solar ACDBs. It helps protect solar inverters, machinery, and sensitive electrical equipment from lightning-induced surges and transient overvoltages. With replaceable cartridges, fast response, and visual status indicators, this DIN rail-mounted AC surge protector supports reliable electrical system protection when properly installed with adequate earthing.