The Schneider Electric A9D51810 is an Acti9 iC60H residual current breaker with overcurrent protection (RCBO) — a single-module (18 mm wide, 2 x 9 mm pitches) device combining thermal-magnetic overcurrent protection and 30 mA earth-leakage detection in one DIN-rail unit. Breaking capacity is 10,000 A Icn at 230/240 V AC, 50/60 Hz, which covers most commercial and light industrial outgoing circuits where the prospective fault current stays under that threshold. The D-curve (10–20× In magnetic trip) suits loads with high starting currents — small motors, pumps, compressors — that would trip a B or C curve on startup.
Clip-on mounting to DIN rail (EN 60715), 18 mm width per module. The 77.5 mm depth and 110 mm height fit standard distribution boards; the 45 mm grid distance aligns with busbar systems. Tightening torque: 3.5 N·m top, 2 N·m bottom. Wire strip lengths are 14 mm top, 13 mm bottom. IP20 finger-safe terminals suit enclosed panel use. The unit is padlockable (Ø 4 mm padlock) for lockout/tagout during maintenance. ON/OFF toggle provides local visual indication of contact position.
Listed to BS EN 61009-1, IEC 61009-1, IEC 61009-2-2, and AS/NZS 61009.1 — the core RCBO standards for overcurrent and residual current protection. Suitable for TN earthing systems. Lifecycle status is current production; this is a standard catalogue item, not a phase-out or NRND line. Electrical durability rated at 5,000 cycles, mechanical at 20,000 cycles — typical for a panel-protection device, not a daily-switching contactor.