The Schneider Electric A9F03710 is an Acti9 iC60N miniature circuit breaker rated 10 A with a B curve, 3P+N poles, and a thermal-magnetic trip unit. It mounts on a DIN rail and is sized for distribution panels — 72 mm wide, 91 mm tall, 78.5 mm deep — so it occupies a standard 4-module footprint in a consumer unit or sub-distribution board. Rated for AC and DC networks at 50/60 Hz, it carries dual certification to EN/IEC 60898-1 (domestic MCB standard) and EN/IEC 60947-2 (industrial breaker standard), which means it can serve both residential final circuits and industrial control-panel feeder protection.
The headline breaking capacity is 36 kA Icu at 12–133 V AC, dropping to 20 kA at 220–240 V, 10 kA at 380–415 V, and 6 kA at 440 V per IEC 60947-2. Under the domestic MCB standard (IEC 60898-1) it delivers 6000 A Icn at 400 V. The B curve means magnetic tripping occurs at 4 x In (±20 %), so a 10 A breaker trips instantaneously between roughly 32 A and 48 A.
The double-terminal design accepts 1–25 mm² rigid or 1–16 mm² flexible on both top and bottom, with a tightening torque of 2 N·m and a strip length of 14 mm.