The Schneider Electric A9F04401 is an Acti9 iC60N miniature circuit breaker rated 1 A with a C-curve magnetic trip characteristic (8 x In ±20 %), 4 poles, and a 50 kA Icu breaking capacity at 380-415 V AC 50/60 Hz per EN/IEC 60947-2. The 4-pole version (4P) switches all four conductors — three phases plus neutral — and is typically used in three-phase distribution where the neutral must be switched for isolation or to meet local wiring rules.
Standards, approvals, and isolation capability
This MCB is dual-certified to EN/IEC 60898-1 (the household / similar installation standard) and EN/IEC 60947-2 (the industrial standard). That dual rating matters for a BOM line: it satisfies both the wiring-rule requirement (60898-1) and the industrial panel SCCR requirement (60947-2). The part is also suitability-for-isolation marked per both standards, meaning you can safely use it as a disconnecting means for the downstream circuit — the contact position indicator gives visual confirmation the contacts are open.
Mounting and integration into a DIN-rail enclosure
The 72 mm width occupies 8 x 9 mm pitches — a standard 4-pole MCB footprint. Depth is 78.5 mm, height 91 mm. Terminals accept 1-25 mm² rigid or 1-16 mm² flexible conductors, with a wire-stripping length of 14 mm and a tightening torque of 2 N.m. The double-terminal design (top and bottom) allows daisy-chaining or looping the supply without extra terminal blocks. IP20 finger-safe protection is standard for enclosed panel mounting.