Features Description of Function: This surge protection device can defend the alternating current power system from thunder or overvoltage. Great Electrical Conductivity: Surge protection device as an internal component, accurate chip, accuracy and strong conductivity is also a nice guarantee. Flame Retardant: Enhances security in usage, flame retardant, and it can withstand greater work strength, improves performance, allows for an enhanced experience in usage. Easy Installation: This protector adopts 2P rail mounting, which is very easy to install. Standard 36MM rail mounting, and distribution box circuit breaker with the use of. Overvoltage Protection: When the system has a surge overvoltage due to strike of thunder or other reasons, the protector immediately opens quickly within nanoseconds and introduces the surge overvoltage to the earth protecting the power using devices. Specification: Item Type: Surge Protection Device Model: CHLT 40PV Material: PC(Flame retardant) Maximum Continuous Operating Voltage: DC600V Nominal Discharge Current: 20kA (8/20μs) Maximum Discharge Current: 40kA (8/20μs) Voltage Protection Level Up: ≤2.8kV Number of Poles: 2P  Protection Level: IP20 Working Temperature: -40℃ - 80℃ Working Humidity: ≤90%(at 25℃ on average) Package List:1 x 2P Surge Protective Device 1 x Sliding Sheet Note:1. The power supply must be cut off before installation, and operation with electricity is strictly prohibited.2. When installation, please connect according to the installation diagram, where + is the positive line, ‑ is the negative line, do not misconnect, after installation is complete, close the automatic circuit breaker (fuse) switch, check whether the working state is normal. Package List 1 x 2P Surge Protective Device 1 x Sliding Sheet