Multipole surge arrester DEHNguard M YPV SCI, type 2 according to EN 61643-31 with three-stage DC switching device, consisting of a base part and plugged-in protection modules. Combined disconnection and short-circuiting device with safe electrical isolation in the protection module. For protecting low-voltage consumer systems against overvoltages. For use in accordance with IEC 60364-7-712:2002-05 (installation of photovoltaic supply systems).