{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18355","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18355","canonicalUrl":"https://aoctrl.com/schneider/A9N18355","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18355","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 C120N, miniature circuit breaker, 125 A, 4P, B curve, 10 kA Icn at 400 V AC, clip-on 35 mm DIN rail.","salesMarkdown":"The Schneider Electric A9N18355 is an Acti9 C120N miniature circuit breaker (MCB) rated 125 A at 30 °C, 4-pole, with a B tripping curve. It carries dual certification to EN/IEC 60898-1 (MCB standard for household and similar installations) and EN/IEC 60947-2 (low-voltage switchgear standard for industrial applications). That dual rating matters: the 60898-1 rating governs its use as a branch-circuit protector in final distribution, while the 60947-2 rating covers industrial panel applications where higher fault currents or isolation duty is required. The A9N18355's breaking capacity is specified at several voltage points, each tied to a different standard. Under EN/IEC 60947-2, the Icu (ultimate breaking capacity) is 20 kA at 220–240 V AC, 10 kA at 380–415 V AC, 6 kA at 440 V AC, and 10 kA at ≤500 V DC. Mounts via clip-on to 35 mm DIN rail. The 4-pole body takes 12 module pitches (9 mm each), so it occupies 108 mm of rail width. Tunnel-type terminals accept 1–50 mm² rigid or 1.5–35 mm² flexible cable; tighten to 3.5 N·m. Wire strip length is 15 mm.","metaTitle":"Schneider Electric A9N18355 Acti9 C120N MCB, 125 A, 4P, B Cu","metaDescription":"Schneider Electric A9N18355 Acti9 C120N miniature circuit breaker, 125 A, 4-pole, B curve. 10 kA Icn at 400 V AC. Dual-rated to EN/IEC 60898-1 and 60947-2. Available to order; conf","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"73 mm","Range":"Acti9","Width":"108 mm","title":"A9N18355","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60947-2 EN/IEC 60898-1","Curve code":"B","description":"Miniature circuit breaker (MCB), Acti9 C120N, 4P, 125A, B curve, 10000A (IEC/EN 60898-1), 10kA (IEC/EN 60947-2)","9 Mm Pitches":"12","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","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 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 10 kA Icu at <= 500 V DC conforming to EN/IEC 60947-2","Device short name":"C120N","Network frequency":"50/60 Hz","Poles description":"4P","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":"3...5 x In","Earth-leakage protection":"Separate block","Number of protected poles":"4","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 - <= 500 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c060b7f53aca853902070c0b0f97f0fd.pdf","sourceUrl":"https://www.se.com/sa/en/product/A9N18355/miniature-circuit-breaker-mcb-acti9-c120n-4p-125a-b-curve-10000a-iec-en-608981-10ka-iec-en-609472/"},"ai":{"faq":[{"question":"What is the breaking capacity of A9N18355 at 400 V?","answer":"Under EN/IEC 60898-1, the Icn is 10 kA at 400 V AC. Under EN/IEC 60947-2, the Icu is 10 kA at 380–415 V AC and 6 kA at 440 V AC."},{"question":"Where can I buy A9N18355 and how is it quoted?","answer":"The A9N18355 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What standards does A9N18355 comply with?","answer":"It is dual-rated to EN/IEC 60898-1 (MCB standard) and EN/IEC 60947-2 (low-voltage switchgear standard). It also carries isolation suitability per IEC 60947-2 and is tropicalised to class 2 per IEC 60068-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18355","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/A9N18355 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}}