Single-pole, coordinated surge arrester DEHNbloc modular, type according to EN 61643-11 based on spark gaps, consisting of a base part and a plugged protection module. Maximum system availability due to RADAX-Flow follow current limitation. Designed to protect low-voltage consumer systems from overvoltages, even in the event of direct lightning strikes. Suitable for use in lightning protection zone concepts at interfaces 0A1. DB M 1 255.