The Schneider Electric A9N18352 is a 63 A, 4-pole miniature circuit breaker from the Acti9 C120N range, with a B curve (magnetic trip 3–5 × In) and thermal-magnetic trip unit. It clips onto a 35 mm symmetrical DIN rail, so it integrates straight into a standard distribution board or panel enclosure — no special adapter needed. Rated 63 A at 30 °C, it handles typical distribution loads in commercial or light industrial panels: lighting circuits, small motor feeders, or general-purpose branch protection. The B curve is the right choice for resistive or slightly inductive loads where inrush stays modest — it trips magnetically between 3 and 5 times the rated current, so it won't nuisance-trip on a lighting bank but clears a hard short fast.
Breaking capacity and dual standard certification
This breaker carries dual certification to EN/IEC 60898-1 and EN/IEC 60947-2 — that means it meets both the household/similar-installation standard and the industrial standard for circuit-breakers. The practical difference: under 60898-1 it's rated 10 kA Icn at 400 V AC (its rated short-circuit capacity for the domestic-duty curve), while under 60947-2 it delivers 6 kA Icu at 440 V AC, 20 kA Icu at 220–240 V AC, and 10 kA Icu at 380–415 V AC. For DC circuits it's rated 10 kA Icu at ≤ 500 V DC. That gives you selectivity headroom in a mixed panel — the higher 20 kA figure at 240 V covers the common North American line-to-neutral fault level.
The lifecycle stage is listed as current — this is an active, in-production part from Schneider Electric's Acti9 family. No end-of-life notice, no last-time-buy window.
Mounting and wiring notes
Tunnel-type terminals accept 1–50 mm² rigid or 1.5–35 mm² flexible; strip length is 15 mm, tightening torque 3.5 N·m.
Environmental and endurance ratings
Electrical durability is 10,000 cycles per IEC 60947-2; mechanical durability 20,000 cycles. Operating altitude up to 2,000 m without derating; overvoltage category IV (suitable for main incoming supply panels).