When surge overvoltage occurs in the system due to lightning stroke or other reasons, the protector immediately conducts in nanoseconds to introduce the surge overvoltage to the earth, thus protecting the electrical equipment on the grid. Technical data Pole: 2P Rated Working Voltage Ue (V): 500VDC Up(kV): 2.2 / 3 .6 Classified Test: II In (8/20) us (kA): 20 lmax (8/20) us (kA): 40 Standard: IEC6164-31 Operating Temperature: -30°C to +70°C Humidity: ≤95% Altitude: 2000m Installation: 35mm DIN Rail Product Size (mm): 65*36*90