Surge arrester B+C 4P (T1+T2 AC) BY7-40/4-275 87.785

Overvoltage limiter BY7-40 catalog number 87.785. Its main task is to protect the electrical installation against switching overvoltages and lightning strikes. The limiter is adapted for mounting on a TH35 rail, it is 72 mm wide (size of 4 18mm modules). The main technical parameters confirmed by the CE declaration are: Iimp: 5kA, Imax: 40kA, In: 20kA, Uc: 275VAC, Up: 1.2kV.