Mounting on 5 mm and 10 mm busbars. TÜV certified according to IEC 61643-11, certificate number: AN 50567910 0001. The modular combination surge protector reliably protects electrical systems from transient overvoltages. It offers high protection against direct lightning strikes in TT, TN-C, and TN-S systems. 12.5 kA surge current resistance per pole. Easy busbar mounting and modular design enable quick installation and maintenance. Included in the delivery are a fuse cover and a terminal lever. Can optionally be equipped with the fuse module SM/MUA-100, allowing for a secured connection from the MUA-100 to an APZ or RfZ field. Combines protection classes Type 1+2+3 in one device, providing comprehensive surge protection from the building entry to the end device. The use of an MUA-100 combination surge protector is mandatory according to DIN VDE 0100-443/534 for new buildings and expansions with high-power consumers (e.g., wallbox, heat pump, PV system). With existing external lightning protection, a protection level is required: Type 1 in the main distribution (e.g., MUA-100, MUA-50) and Type 2 in the sub-distribution (e.g., MUA-30, MUA-20). A Type 2 surge protector in the sub-distribution is only required if the cable length to the main distribution with installed Type 1+2+3 exceeds 10 meters.