Abstract: An apparatus for interrupting the flow of current in a cable, which cable leads from the battery in a motor vehicle to a consumer, also located in the vehicle, such as the starter, engine or the like. A housing is provided, having two connection terminals, electrically insulated from one another, for the lines leading to the battery and to the consumer, and having a switch disposed in the interior of the housing, the switch being assigned a control device which can be tripped by a sensor and whose tripping actuates the switch.