Feature: 1. Main Application: This surge protector is mainly used to defend electrical systems and appliances from transient lightning and surge loads. 2. Quick Response: When there is an abnormal situation in the circuit, the protector will open quickly within nanoseconds, quickly and effectively defend the safety of the circuit. 3. PC Shell: The shell of the surge protector is made of PC material, which is flame retardant and fireproof, effectively defend the accurate chip, which is the core of the protector. 4. Fine Workmanship: The protector is well made with a modular design, which is very easy to use and maintain. 5. Easy to Install: Comes with a compact size and rail installation, the easy installation can be quickly completed in few steps. Specification: Item Type: AC Surge Protector Material: PC Flame Retardant Maximum Continuous Working Voltage Uc: 420V AC Nominal Discharge Current In: 20kA (8/20μs) Maximum Discharge Current Imaximum: 40kA (8/20μs) Voltage Protection Level Up: Less Than or Equal to 1.8KV Number of Poles: 4P Installation: 36MM Rail Protection Class: IP20 Working Temperature: -40℃ to 80℃, Humidity: Less Than or Equal to 90% (Average 25℃). Package List: 1 x AC Surge Protector