Compared with the normal surge protector, the large flow power surge protector for db board has a larger capacity to withstand and release a large amount of current in a short time. The large flow 480 volt 3 phase surge protector can maintain extremely low residual voltage when subjected to surge current, and can respond to large surge voltages in nanoseconds to provide timely protection. Rigorous structure , sophisticated production process, can work stably and reliably in a variety of harsh environments, mostly used in industrial environments, outdoor facilities, communications and data centers, etc