Compact lightning arrester in a plastic surface-mounted housing for protecting information technology interfaces, particularly telecommunications connections up to VVDSL and G.fast (up to 1 GBit/s). Possibility of connecting individual arresters in series. Input-side connection of 1 double wire using tool-free quick connection technology and integrated strain relief for the connection cable. Optional connection of a double wire or a patch cable with RJ45 connector at the output.