Model EA9C45 Residual Current Circuit Breaker with Surge Protective Device Overview The EA9C45 is a combined residual current device and circuit breaker with integrated surge protection, designed for alternating current installations. It provides earth leakage detection, overcurrent interruption, and transient surge suppression in a compact 1P plus neutral configuration. Key benefits Dual function protection: detects and interrupts leakage faults while providing overcurrent circuit breaking in a single unit. Integrated surge protection: reduces the impact of transient overvoltages on connected equipment and supports improved conversion performance in power conversion systems. Flexible current options: available rated currents include 6A, 10A, 16A, 20A, 25A, 32A, and 40A to match branch circuit requirements. Size option available: 25A. Clear pole configuration: type of leakage protector 1P, pole number 1P plus N, color designation 1P N. Wide voltage applicability: rated voltage 690V for typical AC distribution, with an extended voltage classification covering 1000V excluding to 1500V including where applicable. Reliable alternating current operation: designed for AC power systems. Technical highlights Model number: EA9C45 Device type: residual current and circuit breaker combined Surge Protective Device included to improve conversion rates Rated voltage: 690V Voltage classification: 1000V excluding to 1500V including Power type: alternating current Rated current options: 6A, 10A, 16A, 20A, 25A, 32A, 40A Size example: 25A Type of leakage protector: 1P Pole number: 1P plus N Color code: 1P N Why choose this configuration Consolidates leakage detection and overcurrent protection to reduce panel space and simplify wiring. Integrated surge protection helps maintain equipment uptime and reduces stress on sensitive electronics in AC circuits. Multiple rated current choices allow selection for a range of branch circuits without changing device type or wiring layout. 1P plus neutral arrangement is suitable for common singlephase distribution applications. Typical applications Residential distribution boards: branch circuit protection for lighting, outlets, and household appliances, providing leakage protection and surge suppression in one device. Small commercial and light industrial installations: protection for singlephase motors, control circuits, and equipment where transient overvoltages and leakage faults are concerns. Power conversion systems and inverters: integration on AC input or output circuits to combine leakage detection, overcurrent interruption, and transient protection to support stable conversion performance. Notes for installers Select the appropriate rated current from the available options to match circuit load and coordination requirements. Confirm system voltage and the device voltage classification before installation. Pole configuration is 1P plus neutral; ensure neutral handling and upstream protection are compatible with this arrangement. The EA9C45 offers a compact way to combine residual current protection, circuit breaking, and surge suppression for singlephase AC circuits, with multiple current ratings and a clear 1P plus neutral layout.