MHZSP2 surge protector is suitable for AC 50/60Hz, rated voltage 230/400V and below TT, IT, TN-S, TN-C, TN-C-S and other power supply systems, to protect low-voltage power grids and various electrical equipment and control systems, with In order to suppress the transient overvoltage higher than the withstand impulse voltage of the equipment, discharge the surge energy and suppress various surge overvoltages to protect the system circuit and equipment.