Abstract: A disconnector assembly for an on-board voltage network of a vehicle, for the optional connection of a voltage source to a load and the isolation of the voltage source from the load, includes a voltage source terminal region and a load terminal region, and a plurality of MOSFET disconnecting switch elements which are mutually connected in parallel. At least one MOSFET disconnecting switch element of the plurality of MOSFET disconnecting switch elements is configured as a current monitoring disconnecting switch element for the delivery of a representative current variable for a current flowing between the voltage source terminal region and the load terminal region, and at least one MOSFET disconnecting switch element of the plurality of MOSFET disconnecting switch elements is not configured as a current monitoring disconnecting switch element.

Abstract: A vehicle onboard power supply system, supplying a consumer with electrical energy, includes a first voltage detection device (55) detecting a voltage level in a line area (51) between an input terminal (34) of a first circuit breaker (26) and a first battery (16), a second voltage detection device (57) detecting the voltage level in a line area (53) between an input terminal (42) of a third circuit breaker (30) and a second battery (18), a third voltage detection device (58) detecting the voltage level in the area of a consumer connection line (12). An overvoltage detection device (62) detects an overvoltage in the area of the consumer connection line based on the voltage level detected by the third voltage detection device and switches the first circuit breaker and the third circuit breaker into open states when overvoltage is detected in the area of the consumer connection line.

Abstract: A vehicle onboard power supply system, supplying a consumer with electrical energy, includes a first voltage detection device (55) detecting a voltage level in a line area (51) between an input terminal (34) of a first circuit breaker (26) and a first battery (16), a second voltage detection device (57) detecting the voltage level in a line area (53) between an input terminal (42) of a third circuit breaker (30) and a second battery (18), a third voltage detection device (58) detecting the voltage level in the area of a consumer connection line (12). An overvoltage detection device (62) detects an overvoltage in the area of the consumer connection line based on the voltage level detected by the third voltage detection device and switches the first circuit breaker and the third circuit breaker into open states when overvoltage is detected in the area of the consumer connection line.