A 25–63 A DP RCCB is a two-pole residual-current circuit breaker designed for single-phase systems, disconnecting both live and neutral conductors upon detecting earth leakage faults. With rated currents between 25 A and 63 A, sensitivities typically from 30 mA to 300 mA, and breaking capacities around 6–10 kA, it meets standards like IEC 61008-1/IS 12640-1. It operates via a differential transformer with sub-0.1 s trip times, features a test button for regular checks, DIN-rail mounting, finger-safe terminals, and ensures comprehensive protection—preventing electrical shocks and fire hazards while enabling full circuit isolation during maintenance.