Surge Protection Device Circuit Breaker Protector For Home Electrical Accessories AC420V 20-40KA 3P 1. PROTECT THE POWER SYSTEM: The voltage surge arrester device can effectively protect the AC power supply system from lightning strike or overvoltage, very practical2. Stable Electrical Conductivity: Flame-proof and flame-retardant casing prevents internal components from burning out, accurate chips have high accuracy, better electrical conductivity, anti-thunder protection guarantee3. Easy to Maintain: The product adopts modular design and perfect process, which is very simple to use and maintain with good conductivity4. Effective Protection: When a surge overvoltage occurs in the system due to thunder or other reasons, the protection immediately opens quickly within nanoseconds and injects the surge surge voltage into the ground to protect the electrical equipment5. Easy to install: Surge protection device has excellent performance, safer to use, rail mounting is very simple Specification: Item type: Surge protection device Material: Flame retardant PC Maximum continuous operating voltage Uc: 420V AC Nominal discharge current w: 20kA (8/20 mu;s)Maximum discharge current Imax: 40kA (8/20 mu;s)Voltage protection level up: le; 1.8 kv Number of poles: 3P Installation: approx. 36mm / 1.42in rail Protection class: IP20 Operating temperature: -40 ~ 80 , humidity: le; 90% (Average 25) Package List: 1 x Surge Protection Device