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/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 1 x Surge Protector Item Type: Surge ProtectorShell Material: Flame Retardant NylonProduct Size: Approx. 144x90x 65.5mm / 5.7x 3.5x 2.6inProduct Model: BEM-LYI25Product Specifications: 4P25KARated Voltage: 220V/385VMaximum Sustainable Working Voltage: 385VInsulation Resistance: >100MohmImpulse Current (10/350us): Peak Current: 25KA; Amount of Charge: 12.5AS; Energy: 156.25KJ/QMaximum Discharge Current (8/20us): 150KANominal Discharge Current (8/20us): 25KAVoltage Protection Level: ≤ 2.5KVResponse Time: ≤100nSAmbient Temperature: -40℃~+80℃Protection Level: IP20Equipped with Front Fuse: 125AAltitude: Not More Than 2000m/6561ftRelative Humidity: Not More Than 90% (25℃)