Features 【Parameter】: Maximum Continuous Working Voltage Uc: 1000V DC, Nominal Discharge Current In: 20kA (8/20μs), Maximum Discharge Current Imaximum: 40kA (8/20μs), Poles: 3P, Protection Class: IP20 【Surge Protector】: When a overvoltage surge occurs in the system due to lightening strike or other reasons, the protector immediately opens quickly within nanoseconds, and introduces the overvoltage surge into the ground to protecting the electrical equipment. 【Flame Retardant PC Material】: The house surge protector is adopting flame retardant PC materials with modular structure, the voltage arrester is very durable for long use. 【Safe Protection】: The 1000V DC maximum continuous working voltage Uc ensures easier circuit operating as well as higher efficiency. 【Easy to Install】: Standard 36mm rail mount enables stable work performance in combination with distribution box and circuit breaker. Specification: Item Type: Surge Protective Device Model: LT1 40 Material: Flame retardant PC material. Maximum Continuous Working Voltage Uc: 1000V DC Nominal Discharge Current In: 20kA (8/20μs) Maximum Discharge Current Imaximum: 40kA (8/20μs) Voltage Protection Level Up: ≤2.0kV Poles: 3P Installation: 36mm / 1.42in (approx.) rail. Protection Class: IP20 Working Temperature: -40℃~80℃, humidity: ≤90% (average 25℃).  Package List: 1 x Surge Protective Device Note: 1. The power must be cut off before installation, and live operation is strictly prohibited.2. When installing, please connect as shown in the installation diagram, where + is the positive wire and ‑ is the negative wire. Do not make wrong connections. After the installation is complete, close the switch of automatic circuit breaker or fuse, and check whether the working state is normal. Package List 1 x Surge Protective Device