Universal switching insert, single-channel, low self-consumption, automatic setting of the minimum start brightness for 230 V LED and energy-saving lamps, lamp-friendly soft start, phase-on or phase cut-off depending on the load type, self-learning, short-circuit and overload protection (electronic fuse), optional fine-tuning of the load type, with extension unit input for pushbuttons (NO contact) with single-surface operation and motion detector extension, expandable with Plus REG Universal Power Add-ons, also suitable for attaching compatible KNX wireless modules, no conductive connection between support ring and spreader claws, with screw terminals.