The ABB RCBO is a combined MCB/RCD that provides protection against short circuit, thermal overload, and earth leakage. It has a breaking capacity of 10kA at 230VAC and is designed for commercial and industrial applications. The RCBO is 1P+N (single pole + neutral) and has a current rating of 20A. It operates on a C curve type A and has a minimum operating voltage of the test button at 110V. The RCBO is two modules wide, making it compact and space-saving.