Features Superior Power Protection: This device efficiently shields your AC power system from strikes and overvoltage, ensuring reliable during extreme weather conditions Enhanced Conductivity: With a flame-retardant, fireproof enclosure and chips, this protector offers superior electrical conductivity and long-lasting performance against surges Modular Design for Simplicity: The user-friendly modular design allows for easy maintenance and quick replacements, ensuring optimal performance without complicated procedures Features: 1、PROTECT POWER SYSTEM: Voltage surge arrester device can efficiently protect the AC power system from thunderstrike or overvoltage, very practical 2、STABLE ELECTRICAL CONDUCTIVITY: Flame retardant and fireproof enclosure prevents protectors from burning out internal components , accurate chips possess high accuracy, better electrical conductivity, thunder protection guarantee 3、EASY TO MAINTAIN: The product adopt a modular design and excellent process, which is very simple to use and maintain with good conductivity 4、EFFECTIVE PROTECTION: When a surge overvoltage occurs in the system due to thunder or other reasons, the protector immediately opens quickly within nanoseconds, and introduces the surge overvoltage into the ground to protect the electrical equipment 5、EASY TO INSTALL: Surge protective device has excellent performance, safer to use, rail mounted installation is very simple 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