Circuit breaker device, especially for a vehicle electrical system, comprising: - at least one circuit breaker component with a circuit breaker component input terminal, with a circuit breaker component output terminal and with a circuit breaker component driving terminal, wherein the circuit breaker component is in a conductor state when driving voltage is applied to the circuit breaker component driving terminal and the circuit breaker component is in a diode state when driving voltage is not applied to the circuit breaker component driving terminal such that the circuit breaker component is in a blocked state when the circuit breaker component input terminal is at a higher potential than the circuit breaker component output terminal, - a driving unit for providing a driving voltage to be applied to the circuit breaker component driving terminal, - an auxiliary driving unit for providing an auxiliary driving voltage to be applied to the circuit breaker component driving terminal, wherein the auxiliary driving unit is configured to generate the auxiliary driving voltage on the basis of a voltage drop between the circuit breaker component input terminal and the circuit breaker component output terminal when the circuit breaker component is in its diode state and the circuit breaker component output terminal is at a higher potential than the circuit breaker component input terminal, wherein the auxiliary driving unit has a first auxiliary driving unit input terminal connected to the circuit breaker component input terminal and a second auxiliary driving unit input terminal connected to the circuit breaker component output terminal, characterized in that the auxiliary driving unit is configured to multiply the potential difference present between the two auxiliary driving unit input terminals (40, 42) for providing the auxiliary driving voltage. - at least one circuit breaker component with a circuit breaker component input terminal, with a circuit breaker component output terminal and with a circuit breaker component driving terminal, wherein the circuit breaker component is in a conductor state when driving voltage is applied to the circuit breaker component driving terminal and the circuit breaker component is in a diode state when driving voltage is not applied to the circuit breaker component driving terminal such that the circuit breaker component is in a blocked state when the circuit breaker component input terminal is at a higher potential than the circuit breaker component output terminal, - a driving unit for providing a driving voltage to be applied to the circuit breaker component driving terminal, - an auxiliary driving unit for providing an auxiliary driving voltage to be applied to the circuit breaker component driving terminal, wherein the auxiliary driving unit is configured to generate the auxiliary driving voltage on the basis of a voltage drop between the circuit breaker component input terminal and the circuit breaker component output terminal when the circuit breaker component is in its diode state and the circuit breaker component output terminal is at a higher potential than the circuit breaker component input terminal, wherein the auxiliary driving unit has a first auxiliary driving unit input terminal connected to the circuit breaker component input terminal and a second auxiliary driving unit input terminal connected to the circuit breaker component output terminal,