Schneider Electric Resi9 XP RCBO/combiafbryder 3PN C-characteristic 20A 6kA 30mA class A 90mm

The Schneider Electric R9D55720 residual current circuit breaker with overcurrent protection combines residual current protection and circuit breaker functionality in a single 90 mm wide device suitable for DIN rail mounting, occupying five standard 18 mm modules. This 3P+N configuration has a rated current of 20 A with a C-characteristic tripping curve and is designed for 230 V operation in three-phase distribution boards. The device provides comprehensive protection against overload, short circuits, and earth faults, automatically disconnecting the circuit when fault currents between 15 mA and 30 mA are detected to prevent electric shock hazards. A prominent red indicator clearly shows when the device has tripped, while the integrated test button on the front panel allows for regular functional checks. As part of the Resi9 series for advanced residential protection systems, this component meets KEMA certification standards for reliable electrical safety performance. The combination of residual current protection and overcurrent protection in one unit simplifies installation while maintaining high safety standards for personnel and connected devices. Suitable for integration into three-phase distribution boards, this device represents a comprehensive solution for modern electrical safety requirements in residential and light commercial applications where reliable circuit protection is essential. Professional installation by certified electricians is recommended for any modifications to electrical distribution systems to ensure proper operation and compliance with local electrical regulations and safety standards.