Schneider Electric A9DC2940 is an Acti9 iC60H3 RCBO — a 3-pole plus neutral residual current breaker with overcurrent protection, rated 40 A at 30 °C, curve C, with 10 kA Icn breaking capacity at 400/415 V and 100 mA earth-leakage sensitivity. The thermal-magnetic trip unit handles both overload and short-circuit; the integrated earth-leakage module covers ground faults. Clip-on mounting on DIN rail or chassis, 54 mm wide (6 x 9 mm pitches), 77.2 mm deep, 112 mm high. IP20 finger-safe terminals.
The curve C trip characteristic (5–10 x In) means it tolerates moderate inrush from motor or transformer loads without nuisance tripping. The 100 mA earth-leakage sensitivity is a general-purpose ground-fault protection level, not the 30 mA required for personal shock protection in socket-outlet circuits — it's sized for equipment protection and fire prevention on outgoing feeders. Limitation class 3 (energy-limiting) means it restricts let-through energy under fault conditions, reducing stress on downstream wiring and devices.
Clip-on mounting on DIN rail or chassis. The 54 mm width (6 x 9 mm pitches) fits standard modular enclosures. Wire stripping length: 11 mm for bottom connection, 14 mm for top. Tightening torque: 2.5 N·m both top and bottom. Neutral position is left; the device is padlockable with a Ø 4 mm padlock or lead seal. ON/OFF indication via toggle. Tropicalisation class 2 for humid environments (95% RH at 55 °C).