1、Stable Performance: SPD series graphite gap type surge protector (belonging to first class lightning protection device, 10/350us waveform) is designed according to IEC and GB standards. 2、Application: It is applied to the first level surge protection of the power supply of equipment systems in areas with a high risk of lightning strikes. 3、Safe to Use: It can prevent various surge currents including direct lightning strikes, and can be applied to single phase and three phase power supply lines through a combination of different numbers 4、Modular design: Standard 35mm/1.3in guide rail installation method, installed in the building's main power distribution cabinet (box), outdoor power distribution cabinet (box). 5、High Lightning Current Discharge Capability: No freewheeling, the maximum impulse current (10/350us) of a single module can reach limp‑25KA, and the maximum discharge current (8/20us) can reach maximum=150KA Item Type: Surge Protector Shell Material: Flame Retardant Nylon Product Size: Approx. 144x90x65.5mm / 5.7x3.5x2.6in Product Model: BEM-LYI25 Product Specifications: 4P25KA Rated Voltage: 220V/385V Maximum Sustainable Working Voltage: 385V Insulation Resistance: >100Mohm Impulse Current (10/350us): Peak Current: 25KA; Amount of Charge: 12.5AS; Energy: 156.25KJ/Q Maximum Discharge Current (8/20us): 150KA Nominal Discharge Current (8/20us): 25KA Voltage Protection Level: ≤2.5KV Response Time: ≤100nS Ambient Temperature: -40℃~+80℃ Protection Level: IP20 Equipped with Front Fuse: 125A Altitude: Not More Than 2000m/6561ft Relative Humidity: Not More Than 90% (25℃) 1 x Surge Protector