Spark extinguishing circuit on a switching contact

摘要

A spark extinguishing circuit is provided on an electrical switching contact 1 which is connected in series with an inductive coil 4. In order in this case to reduce the space requirement to a minimum and to increase the reliability and life of the switching contact, a capacitor 5 and a zener diode 6 are connected in parallel with the switching contact 1, the capacitor initially taking over the current produced by the self-induction voltage of the coil 4 after the switching contact 1 has been opened, which current is subsequently dissipated to a supplying battery when the zener voltage of the zener diode is reached. <IMAGE>