Features Power System Protection: Safeguard your AC power system from thunderstrike and overvoltage, ensuring reliable protection against electrical surges and fluctuations. Flame Retardant Enclosure: The flame retardant and fireproof enclosure prevents internal components from burning out, while the accurate chips ensure high accuracy and better electrical conductivity, offering a guarantee against thunder protection. Modular Design for Easy Maintenance: Adopting a modular design and excellent process, this surge protective device is simple to use and maintain, providing good conductivity and ease of maintenance. Nanosecond Surge Response: With nanosecond response time, this protector opens quickly when surge overvoltage occurs, diverting the excess energy to the ground and effectively protecting electrical equipment from damage. Simple Rail Mount Installation: This surge protective device offers excellent performance, ensuring a safer and simple rail-mounted installation for added convenience. Specification: Item Type: Surge Protective Device Material: PC flame retardant Maximum Continuous Working Voltage Uc: 420V AC Nominal Discharge Current In: 20kA (8/20μs) Maximum Discharge Current Imax: 40kA (8/20μs) Voltage Protection Level Up: ≤1.8KV Number of Poles: 3P Installation: Approx. 36mm / 1.42in rail Protection Class: IP20 Working Temperature: -40℃~80℃, Humidity: ≤90% (average 25℃) Package List: 1 x Surge Protective Device Package List 1 x Surge Protective Device