An electromechanical switching device for providing an electrical connection between terminals as a function of a switched state based on a manual activation, where the switching device has a rotatably mounted activation unit that can be activated manually and a switching unit which is connectable to the activation unit, the switching unit provides pat least two electrical terminals and electrically interconnects them as a function of the electrical switched state, for which purpose the switching unit has at least one switching element slideably mounted in a longitudinal direction of the switching device, the switching device has a coupling unit that mechanically interconnects the activation and switching units and that is configured to transmit the manual activation of the activation unit to the switching element of the switching unit, and where the electromechanical switching device is formed in a modular manner via at least the activation, coupling unit and switching units.