Electronic two-wire momentary-contact switch

摘要

The invention relates to an electronic two-wire momentary-contact switch for traffic lights, door openers in rail or road vehicles, for machine controls and the like, comprising a voltage-controlled switching element (8) switching a load circuit (7) and having a device (10) for generating the control voltage (U1). To achieve a long closing period and to keep the energy requirement of the momentary-contact switch low, it is provided that the device (10) for generating the control voltage (U1) has a storage capacitor (15) which can be charged to the control voltage (U1) from the load circuit (7) via a diode (14) and which can be connected to a high-impedance control input (9) of the switching element (8) via a momentary mechanical contact (19). <IMAGE>