The Schneider Electric A9D40625 is a 1P+N residual current breaker with overcurrent protection (RCBO) from the Acti9 range, combining a 25 A thermal-magnetic circuit breaker (C-curve) with integrated 10 mA earth-leakage protection in a single 18 mm wide DIN-rail module. Rated 25 A at 30 °C with a 6 kA breaking capacity (Icn at 230/240 V AC, 50 Hz), it handles final-circuit distribution in residential and light commercial panels where both overcurrent and personnel protection are required on a single pole. The 10 mA sensitivity is tighter than the standard 30 mA used for socket-outlet protection — this unit is specified for circuits where a lower trip threshold is needed.
C-curve magnetic trip (5 to 10 × In) means the unit will hold through moderate inrush from small motor or capacitive loads but trips fast on a hard short — typical for general-purpose distribution circuits feeding socket outlets or lighting. Integrated earth-leakage protection with 10 mA sensitivity saves a separate RCD module and one DIN space — the 18 mm width per pole keeps the panel compact. Rated insulation voltage 400 V AC and suitability for isolation with a contact position indicator mean this RCBO can serve as a local disconnection point for downstream equipment during maintenance, provided the supply side is isolated.
Clip-on mounting to standard 35 mm DIN rail. Occupies 2 × 9 mm pitches — 18 mm total width — so it fits a standard modular enclosure row. Tunnel-type terminals: upstream accepts 1 to 16 mm² rigid or flexible, downstream 1 to 10 mm². Strip length 13 mm upstream, 11 mm downstream. Tightening torque 2 N·m both sides. Neutral is on the left; the toggle switch provides local ON/OFF indication and can be locked in either position.
This is an active catalog item in the Acti9 range.