Feature: 1. APPLICATION: Mainly suitable for 50Hz (or 60HZ) electrical circuit with an impulse current capacity less than 200kA. 2. SURGE ARRESTER: The house voltage protector can limit the amplitude of transient overvoltage, absorb, consume or discharge the energy of surge current. 3. CIRCUIT PROTECTION: When facing higher overvoltage category, the protected electrical components can be converted from one overvoltage category to another lower overvoltage category. 4. HOME USE: Can be applied for the protection of electrical appliances in households and similar places when there is an induced lightning overvoltage in the line, and when the operating overvoltage occurs. 5. SIMPLE INSTALLATION: Installation method is matched with TH35mm wide rail, very convenient to install with small size and light weight. Specification: Item Type: Surge Protective Device Product Model: BEM-LY40 Product Specifications: 3P40KA Maximum Discharge Current: 40KA Nominal Discharge Current: 20KA Response Time: ≤25nS Ambient Temperature: -40℃~+80℃ Altitude: not more than 2000 meters (Approx. 2000m / 6561.7ft). Relative Humidity: Not more than 90% (25℃). . Package List: 1 x Surge Protective Device Note: 1. The indicator window of the module is green (normal). When the module deteriorates, the indicator window turns red and must be replaced in time; 2. The surge protector can be equipped with (FS) remote signal alarm. The remote signal contact has one normally open and one normally closed. If one or multiple modules of the surge protector fail, the contact will be closed and a fault alarm signal will be sent, indicating that the module is faulty and must be replaced. 3. Frequently check the air switch or fuse connected in series on the line.