The Schneider Electric A9D06825 is an Acti9 iC60H RCBO — a residual current breaker with overcurrent protection in a single 18 mm module (1P+N). It combines thermal-magnetic overcurrent protection (C-curve, 5–10× In magnetic trip) with integrated earth-leakage detection at 100 mA sensitivity. Rated 25 A at 50 °C, it breaks up to 10 kA at 240 V AC (Icn per IEC 61009-2-2). The 100 mA earth-leakage threshold is typical for circuits where a 30 mA trip would cause nuisance tripping from leakage in long cable runs or equipment with inherent leakage.
Plug-on mounting onto an Isobar B or Isobar A busbar system. Two 9 mm pitches (18 mm width) fit standard DIN-rail enclosures. Neutral on the left, phase on the right — maintain orientation when wiring the board. Tightening torque: 3.5 N·m top, 2 N·m bottom. Strip length 14 mm top, 13 mm bottom. IP20 finger-safe (IP40 in modular enclosure). Overvoltage category II, pollution degree 2 by implication from the standard set.