Redundant interrupt for circuit arrangement and electrical system

A circuit arrangement comprising:

• at least one semiconductor switch (10),
• a gate driver (20),
• a power supply (30),
• a control unit (40),
• a monitoring unit (50), and
• a shutdown device (60),
• wherein the semiconductor switch (10) is configured
• to be arranged in a circuit consisting of a power source (70) and a load (80),
• to close and interrupt the circuit as a function of a control of a gate connection (12) of the semiconductor switch (10) by the gate driver (20),
• the power supply (30) is provided for supplying the gate driver (20),
• the control unit (40) is configured to control the gate driver (20) to open and close the semiconductor switch (10),
• the monitoring unit (50) is configured to determine a request for a redundant interruption of the circuit based on predefined criteria, and
• the shutdown device (60) is configured to shut down a gate voltage applied to the gate connection (12) of the semiconductor switch (10) in response to the request for the redundant interruption of the circuit independent of a current control of the gate driver (20) by the control unit (40), such that an interruption of the circuit is effected by the semiconductor switch (10), and
• wherein the shutdown device (60) comprises a second switch (95) connected between a supply connection (22, 24) of the gate driver (20) and a connection of the power supply (30) and/or is configured to deactivate the power supply, and which is in a closed state in the absence of the request for the redundant interruption of the circuit, and is configured to open the second switch (95) in response to the request for the redundant interruption of the circuit, such that the gate voltage is switched off due to an interruption of the power supply (30) for the gate driver (20).