The Schneider Electric A9D33710 is a 3P+N RCBO from the Acti9 DPN Vigi family — a combined overcurrent and earth-leakage protection device in a single modular enclosure. Its 10 A rated current (In) with C-curve magnetic trip (5–10 × In) suits it for general-purpose distribution circuits feeding resistive and moderate inductive loads, such as lighting banks or small motor starters, where inrush is not extreme. The 30 mA earth-leakage sensitivity meets the standard for personal protection against indirect contact in TN and TT systems.
The unit occupies 10 modular pitches of 9 mm each (90 mm total width). Tunnel terminals accept 0.75–16 mm² rigid or 0.33–10 mm² flexible conductors; strip length is 15 mm, tighten to 2 N·m. The toggle gives local indication of ON, OFF, and fault trip, which helps during commissioning and fault-finding.