The Schneider Electric A9D87410 is a 4-pole Acti9 iC60 RCBO — a combined overcurrent and earth-leakage protection device rated at 10 A with a B-curve trip characteristic and 30 mA residual-current sensitivity, breaking capacity of 6 kA at 380–415 V AC. It clips onto DIN rail and fits in a distribution board as an outgoer for final circuits where both short-circuit and ground-fault protection are needed in one unit.
The 10 A rated current and B-curve (magnetic trip at 3–5× In) make this RCBO suited for lighting and general-purpose socket circuits where inrush is modest. The 30 mA earth-leakage sensitivity provides personal protection against indirect contact — standard for most residential and commercial final circuits. Breaking capacity of 6 kA at 380–415 V AC is the Icn per EN/IEC 61009-2-1 and the Icu per EN/IEC 60947-2; 6 kA covers typical domestic and light commercial fault levels, but if your service entrance has a higher prospective short-circuit current, you'll need to check coordination upstream. The thermal-magnetic trip unit handles overloads (thermal) and short-circuits (magnetic) in one block. The device is marked with limitation class 1 per EN/IEC 61009-2-1, meaning it lets through a moderate amount of let-through energy under fault — fine for most final circuits, but if you're chasing tight selectivity with upstream breakers, class 3 (current-limiting) devices are a better choice.
Clip-on mounting to DIN rail, 4-pole width occupies 8 pitches of 9 mm (72 mm total). Tunnel-type terminals accept 1–35 mm² rigid or 1–25 mm² flexible cable; wire strip length is 12 mm for top or bottom connection. Tightening torque 2 N·m. The IP40 rating in a distribution enclosure is typical for indoor panels; the device itself carries IP20. Local signalling shows ON, OFF, and fault-trip status on the toggle.