Device and method for safety switch off of an electrical consumer in a vehicle

A method for a safety switch-off of an electrical consumer in a vehicle, which is connected directly or indirectly to a supply line provided with an electronic switch, the method comprising:

• monitoring, by a main monitoring unit having an operation which is switchable from a monitoring mode to a standby mode and vice versa, a current consumption of the consumer in the monitoring mode of the main monitoring unit with respect to a safety switch-off threshold being exceeded or fallen short of, and when the switch-off threshold is exceeded or fallen short of, generating a switch-off signal for switching off the electronic switch by the main monitoring unit,
• switching the main monitoring unit from the standby mode to the monitoring mode when an amplitude of a dynamic changes of the current consumption of the consumer reaches or exceeds a first threshold value and/or falls short of or exceeds a first value range and/or a voltage value proportional to the first threshold value or a voltage range proportional to the first value range, and
• monitoring the current consumption of the consumer in the standby mode of the main monitoring unit by an auxiliary monitoring unit with respect to a potential dynamic change of the amplitude, and which, when the first threshold value is reached or exceeded and/or when the first value range and/or a voltage value proportional to the first threshold value or a voltage range proportional to the first value range is fallen short of or exceeded, triggers the switching of the main monitoring unit from the standby mode to the monitoring mode.