Single pole surge arrester SPD-B40 / 1P 40kA Elmark   Technical characteristics Nominal discharge current: 5-40 A Rated operating voltage Uc: 275 / 440V, 50Hz Number of poles: 1P Maximum discharge current: 10-60 A Overload risk level: B;C;D (high to low risk level) Constant operating current: up to 800μА for 1р Temperature environment: -10 ° ÷ 65ºС  Installation altitude: up to 2000m Mounting: vertical on DIN rail Standards: EN61643-1 Model: SPD Nominal voltage: 275 V Nominal current: 40 A  Number of poles: 1 Pulse voltage: ≤2 (kV) Brand: ELMARK EAN code: 3800131110428 Vendor code: 64104