The ABB C3SS2-10B-20 is a 2-pole (1+N) miniature circuit breaker with a Type B tripping characteristic and a 10 kA breaking capacity. It has a 20A rated current and is designed to protect electrical circuits against overloads and short circuits in residential, commercial, and light-industrial applications. The "1+N" configuration means the first pole ("1") provides full protection (overload and short-circuit), while the neutral pole ("N") functions primarily as an isolator or switching pole; it may provide short-circuit protection but typically does not have overload protection. It is designed for easy installation on a standard 35mm top-hat DIN rail.