The Schneider Electric A9DC4710 is an Acti9 iCV40H RCBO — a combined residual-current circuit breaker with overcurrent protection, 3 poles plus neutral, rated 10 A with a C-curve magnetic trip (5 to 10 x In). It integrates earth-leakage protection at 30 mA sensitivity, so one device covers both overcurrent and ground-fault protection on the outgoing circuit. Limitation class 3 per the same standard keeps let-through energy low, which helps with downstream device coordination. The 9 mm connection pitch between phase and neutral matches the standard Acti9 modular spacing — 10 modules wide (90 mm).
The 30 mA earth-leakage threshold is the standard sensitivity for personal protection against indirect contact. The C-curve (5 to 10 x In magnetic trip) suits loads with moderate inrush. Mechanical and electrical durability both rated at 20,000 cycles, which is typical for a distribution-grade RCBO — not a switching device for frequent load making/breaking, but fine for protection duty with occasional manual operation.
Neutral is on the left (fixed position), so busbar and wiring order matters when replacing an existing unit in a multi-row board. The toggle control gives clear ON/OFF and fault-indication status through the front window.