The A9D16845: The 45 A rating at 50 °C is the continuous current the RCBO can carry without tripping under normal load. The C-curve means the magnetic trip operates at 5 to 10 times In (225–450 A), suited for inductive loads like motor starters or fluorescent lighting banks where inrush exceeds a B-curve's threshold. The 30 mA earth-leakage sensitivity provides personal protection against direct contact with live parts, required in circuits supplying socket outlets or portable equipment. The 1P+N configuration switches the line conductor only; the neutral is switched internally for isolation but not protected against overcurrent. The 18 mm width (2 x 9 mm pitches) means this RCBO occupies a single module position on the DIN rail — a tight fit for high-density boards.
The A9D16845 is listed as current production with no end-of-life notification. No official successor part exists because it remains the active SKU in the Acti9 range.