Multipole surge arrester DEHNguard MP ACI, type 2 according to EN 61643-11 with integrated ACI switch/spark gap combination, consisting of base part with plug-in protection modules and double push-in connection terminal suitable for stub and through-wiring. High device safety thanks to arrester monitoring with thermo-dynamic control. Designed for protecting low-voltage consumer installations against overvoltages. Suitable for use in the lightning protection zone concept at interfaces 0B 1 and higher.