Panel fit for a 4-pole RCBO
The ABB 2CSR256040R1164 DS203NC C16 AC30 is a 4-pole RCBO combining overcurrent and residual current protection in a single DIN-rail module — 16 A rated current with 30 mA trip sensitivity and a Type C tripping curve. It fits standard distribution boards where both earth leakage and short-circuit protection are needed on a single outgoing circuit, saving a pole position compared to separate MCB + RCCB.
The 30 mA residual sensitivity catches direct-contact earth faults per IEC 60364 — the standard threshold for socket-outlet and general-purpose circuits where additional protection against lethal shock is required. Four poles cover three-phase + neutral circuits, so this RCBO protects all live conductors including the neutral against both overload and earth leakage.