Features 【Surge Protection】:This surge protective device provides best surge protection against electrical spikes, you don't have to worry that your electronic devices are damaged in stormy weather with thunders. 【High Performance】: House surge protector adopts copper accessory for better conductivity performance, flame retardant shell, fire proof, safe to use, with long service life and stable performance. 【Multi-function】: Electric system arrester device will meet your different requirements whether in living room, bedroom, bathroom, office, protecting home appliances and your safety. 【Easy to Install】: The house surge arrester device adopts 4P guide rail installation, installation is very simple;and it is very easy to connect to the circuit, and the simple wiring can be completed in minutes. 【Reliable Working】:This Din Rail Low‑voltage Arrester only applies to AC 420V 40KA, protect electric system and on-loading electrical apparatus from thunder and instantaneous over-voltage. Specification: Item Type: Surge Protective Device Model: CHLT-40PV Maximum Continuous Working Voltage Uc: 500V DC Nominal Discharge Current In: 20kA (8/20μs) Maximum Discharge Current Imax: 40kA (8/20μs) Voltage Protection Level Up: ≤2.8kV Number of Poles: 2P Protection Level: IP20 Working Temperature: -40℃~80℃, humidity: ≤90% (average at 25℃).  Package List:1 x Surge Protective Device1 x Slip Sheet Note:1. The power supply must be cut off before installation, and hot line work is strictly prohibited;2. When installing, please connect according to the installation diagram, where + is the positive wire and ‑ is the negative wire. Do not connect it wrongly. After installation, close the automatic circuit breaker (fuse) switch and check whether the working state is normal. Package List 1 x Surge Protective Device 1 x Slip Sheet