It combines a 20 A thermal-magnetic MCB (C-curve) with integrated 100 mA earth-leakage protection, all in a 1P+N format. Clip-on DIN rail mounting and 2 x 9 mm pitch width make it a direct swap into any Acti9 or standard distribution board.
The 20 A rated current at 50 °C is the continuous load it carries without tripping — sized for lighting, socket circuits, or small appliance groups. The 100 mA earth-leakage sensitivity is a common choice for general-purpose socket circuits where 30 mA would be too sensitive for leakage from connected equipment. Integrated earth-leakage saves a separate RCD module and one DIN space — the whole RCBO fits in 18 mm.
This is an outgoer device — it protects a final subcircuit, not an incoming main. The 1P+N format switches the phase and breaks the neutral, with neutral on the left. Wire stripping length is 14 mm top, 13 mm bottom. Padlockable with a 4 mm padlock for lockout/tagout.