Feature: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 numbers4. 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 limp25KA, and the maximum discharge current (8/20us) can reach maximum=150KASpecification:Item Type: Surge ProtectorShell Material: Flame Retardant NylonProduct Size: Approx. 144x90x65.5mm / 5.7x3.5x2.6inProduct 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~+80Protection Level: IP20Equipped with Front Fuse: 125AAltitude: Not More Than 2000m/6561ftRelative Humidity: Not More Than 90% (25).Package List:1 x Surge ProtectorNote:The indicator window of the module is green (normal). When the module deteriorates, the indicator window turns red and must be replaced in time;The surge protector can be equipped with (FS) remote remote signal alarm. The remote signal contact has one normally open and one normally closed. If one or more modules of the surge protector fail, the contact will be closed and a fault alarm signal will be sent to indicate The module must be replaced if it fails.Always check the air switch or fuse connected in series on the line.