The 2CSR255180R2405 RCBO breaker with Inom of 40A, Ires of 100mA, Poles of 1+N, 230VAC, DIN, IP20 manufactured by ABB is an electronic component designed to protect circuits and control electrical current within specific parameters. It features a Residual Current Device (RCD), which is capable of accurately measuring and reacting to even the smallest amount of current leakages. The breaker uses an adjustable trip threshold setting with a delayed action tripping mechanism to reduce nuisance tripping and allow for better protection of the associated electrical circuit. The breaker itself is DIN-rail mounted, and is also IP20 rated, making it suitable for indoor installation.