The ABB 2CSR255080R1254 is a Residual Current Circuit Breaker (RCBO) with Overcurrent Protection (Inom) rated for 25A, Residual Operating Current (Ires) rated for 30mA, 1+N poles, 230VAC, a DIN rail mounting form factor, and IP20 protection rating. This RCBO breaker is designed to automatically detect and disconnect current-carrying conductors when a fault is detected, helping to protect against electric shock, fire, and other potential hazards.