FEIN motor protection plugs reliably protect high-frequency power tools from overload. A bimetal trigger, which is individually set to the respective rated current of the connected machine, prevents activation too late or too early during short-term overloads. The motor protection plug is fitted to the connecting cable of high-frequency power tools instead of the normal pin connector. The motor protection plug consists of the CEE-compliant plug, thermal triggers with temperature compensation and a turn-on toggle.