{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18363","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18363","canonicalUrl":"https://aoctrl.com/schneider/A9N18363","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18363","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 C120N, A9N18363, miniature circuit breaker, 2P, 125 A, C-curve, 10 kA Icn at 400 V AC.","salesMarkdown":"The A9N18363 is a 2-pole miniature circuit breaker from Schneider Electric's Acti9 C120N range, rated 125 A at 30 °C with a C-curve (magnetic trip 5–10 × In). The 6 kA Icu at 440 V AC per EN/IEC 60947-2 is the ultimate breaking capacity for industrial panel duty where the fault current may be higher; you size the upstream protection to stay within whichever rating governs your installation standard. Thermal-magnetic trip technology means the bimetal handles overloads (slow, heat-dependent) while the solenoid handles short-circuits (instantaneous above the magnetic threshold). This is the standard for distribution applications — no electronics to fail, no auxiliary power needed to trip. Clip-on mounting to 35 mm symmetrical DIN rail, 6 module pitches at 9 mm each — 54 mm total width. That's the standard footprint for a 2-pole 125 A MCB in the Acti9 system; it snaps into the same rail as the rest of the distribution board. Tunnel terminals accept 1–50 mm² rigid or 1.5–35 mm² flexible copper. Strip length 15 mm, tightening torque 3.5 N·m. The terminal capacity is generous for a 125 A breaker — you can land a 50 mm² feeder without a ferrule, which matters when the incoming cable runs warm from the mill transformer. IP20 finger protection on the front face; inside the enclosure that's fine, but keep it behind a gland plate if the panel sees washdown or dust. Dual-rated to EN/IEC 60947-2 (industrial) and EN/IEC 60898-1 (household / commercial). That dual certification is the key for a panel that crosses between a utility supply and an industrial load — the breaker satisfies both the installation standard and the equipment standard. That's the standard for non-condensing humid environments — fine for most indoor panels, but if the panel sits in a washdown zone or a tropical outdoor cabinet, verify the enclosure keeps condensation off the terminals. That's a real advantage in a multi-level distribution board: the MCB itself limits the fault energy, so you can use lower-rated busbars or downstream breakers.","metaTitle":"Schneider Electric A9N18363 Acti9 C120N MCB, 125 A, 2P, C-Cu","metaDescription":"Schneider Electric A9N18363 Acti9 C120N miniature circuit breaker, 125 A rated, 2-pole, C-curve, 10 kA Icn at 400 V. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"73 mm","Range":"Acti9","Width":"54 mm","title":"A9N18363","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60947-2 EN/IEC 60898-1","Curve code":"C","description":"Miniature circuit breaker (MCB), Acti9 C120N, 2P, 125A, C curve, 10000A (IEC/EN 60898-1), 10kA (IEC/EN 60947-2)","9 Mm Pitches":"6","Control type":"Toggle","Network type":"AC","Product name":"Acti9 C120","Mounting mode":"Clip-on","Tropicalisation":"2 conforming to IEC 60068-1","lifecycle_stage":"current","Limitation class":"3 conforming to EN/IEC 60947-2","Local signalling":"ON/OFF indication","Mounting support":"35 mm symmetrical DIN rail","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60947-2","Breaking capacity":"10000 A Icn at 400 V AC 50/60 Hz conforming to EN/IEC 60898-1 6 kA Icu at 440 V AC 50/60 Hz conforming to EN/IEC 60947-2 10 kA Icu at 20 kA Icu at 220...240 V AC 50/60 Hz conforming to EN/IEC 60947-2 10 kA Icu at 380...415 V AC 50/60 Hz conforming to EN/IEC 60947-2","Device short name":"C120N","Network frequency":"50/60 Hz","Poles description":"2P","Relative humidity":"95 % at 55 °C","Tightening torque":"3.5 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"125 A at 30 °C","Overvoltage category":"IV","Trip unit technology":"Thermal-magnetic","Electrical durability":"5000 cycles conforming to IEC 60947-2","Mechanical durability":"20000 cycles","Wire stripping length":"15 mm","Connections - terminals":"Tunnel type terminals1...50 mm² rigid Tunnel type terminals1.5...35 mm² flexible","IP degree of protection":"IP20 conforming to IEC 60529","Magnetic tripping limit":"5...10 x In","Earth-leakage protection":"Separate block","Number of protected poles":"2","Product or component type":"Miniature circuit-breaker","Suitability for isolation":"Yes conforming to IEC 60947-2","Contact position indicator":"Yes","Locking options description":"Handle sealable with cable diameter 0.7mm in OFF or ON position","[Ui] rated insulation voltage":"500 V AC 50/60 Hz conforming to EN/IEC 60947-2","[Ue] rated operational voltage":"380...415 V AC 50/60 Hz 220...240 V AC 50/60 Hz 440 V AC 50/60 Hz 230...400 V AC 50/60 Hz","Ambient air temperature for storage":"-40...85 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"7500 A 75 % conforming to EN/IEC 60898-1 - 400 V AC 50/60 Hz 4.5 kA 75 % conforming to EN/IEC 60947-2 - 440 V AC 50/60 Hz 7.5 kA 75 % conforming to EN/IEC 60947-2 - 380...415 V AC 50/60 Hz 15 kA 75 % conforming to EN/IEC 60947-2 - 220...240 V AC 50/60 Hz 10 kA 100 % conforming to EN/IEC 60947-2 - <= 250 V DC","[Uimp] rated impulse withstand voltage":"6 kV conforming to EN/IEC 60947-2","Comb busbar and distribution block compatibility":"YES"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$145.43","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6d660c51b221f28b74213f9f7d0ceb2d.pdf","sourceUrl":"https://www.se.com/nz/en/product/A9N18363/miniature-circuit-breaker-mcb-acti9-c120n-2p-125a-c-curve-10000a-iec-en-608981-10ka-iec-en-609472/"},"ai":{"faq":[{"question":"What is the breaking capacity of the A9N18363?","answer":"10 kA Icn at 400 V AC per EN/IEC 60898-1, and 6 kA Icu at 440 V AC per EN/IEC 60947-2. It also carries a 10 kA Icu at 220–240 V and 380–415 V AC under the 60947-2 standard."},{"question":"What compliance documentation does Schneider provide for the A9N18363?","answer":"The breaker is certified to EN/IEC 60947-2 and EN/IEC 60898-1. It carries tropicalisation class 2 per IEC 60068-1. RoHS, REACH, and UL documentation are typically available from Schneider's product documentation portal for this Acti9 series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18363","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/A9N18363 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}