The Schneider Electric A9D31845 is an Acti9 iC60H RCBO — a combined residual current breaker with overcurrent protection in a single 18 mm wide module. It carries a 45 A rated current at 50 °C with a B curve trip characteristic, integrated 30 mA earth-leakage protection, and a 10 kA breaking capacity at 230/240 V AC. That 10 kA Icn rating means it can safely interrupt fault currents up to 10,000 A without upstream damage — sized for final subcircuits in TN earthing systems where the prospective short-circuit current stays under that threshold.
Clip-on mounting to DIN rail, 2 x 9 mm pitches wide (18 mm total). Neutral on the left, single pole protected.
