The SE A9Z66440 residual current circuit breaker is a highly advanced device specifically designed to protect electrical installations from fault currents. With a rated current of 40 A and a rated residual current of 500 mA, this 4-pole circuit breaker provides a reliable solution for securing single-phase or three-phase supply networks. The integrated SI technology enhances resistance to electrical disturbances, making it particularly suitable for applications with frequency converters and inverters. The residual current circuit breaker is easy to install and maintain, as it features a test button for regular functional checks. Additionally, the mechanical fault indication allows for quick identification of tripping events, while the safe contact indication ensures voltage-free conditions on the outgoing side. The circuit breaker meets relevant standards and is suitable for mounting on DIN rails.

• Mechanical fault indication (VisiTrip) to display tripping events due to fault currents
• Safe contact indication (VisiSafe) to ensure voltage-free conditions
• Double connection terminals for connecting cables or busbars from both sides
• Easy removal of the individual device when a busbar is installed
• Additional snap-on auxiliary modules for extended functions.