{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18391","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18391","canonicalUrl":"https://aoctrl.com/schneider/A9N18391","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18391","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 C120N, A9N18391, miniature circuit breaker, D curve, 80 A, 4P, 10 kA Icn at 400 V AC, clip-on 35 mm DIN rail.","salesMarkdown":"The A9N18391 is a Schneider Electric Acti9 C120N miniature circuit breaker rated 80 A at 30 °C with a D tripping curve (magnetic trip threshold 10–14 × In). The 80 A continuous rating at 30 °C is the thermal-magnetic trip unit's baseline; per the datasheet, ambient derating applies above that temperature, so verify the panel's internal temperature if it runs hot. Breaking capacity is listed at three voltage points: 10 kA Icn at 400 V AC per EN/IEC 60898-1, and 20 kA Icu at 220–240 V AC or 6 kA Icu at 440 V AC per EN/IEC 60947-2. The 60947-2 Icu ratings give you the ultimate short-circuit capacity for industrial panel designs where the breaker is used as a disconnect under fault conditions. The 4-pole configuration (4P) switches all four poles simultaneously, with the neutral pole protected. This is the correct choice for three-phase four-wire systems (TN or TT earthing) where you need coordinated isolation and overcurrent protection on all phase conductors plus the neutral. The toggle mechanism provides local ON/OFF indication and a contact position indicator confirms the state of the moving contacts per IEC 60947-2. The 108 mm width occupies 12 × 9 mm pitches on the rail — plan for that footprint when laying out the distribution board. Tunnel-type terminals accept 1–50 mm² rigid or 1.5–35 mm² flexible conductors; strip length is 15 mm, tightening torque 3.5 N·m. Overvoltage category IV (rated for installations at the origin of the electrical service, before the main distribution panel) confirms it can handle the higher transient overvoltages seen at the service entrance. Dual certification to EN/IEC 60898-1 (the residential/light-commercial MCB standard) and EN/IEC 60947-2 (the industrial circuit-breaker standard) means this breaker qualifies for both domestic distribution boards and industrial panel designs. The 60947-2 certification also includes the suitability-for-isolation marking — the breaker can serve as a visible-break disconnect in the open position, per the contact position indicator.","metaTitle":"Schneider Electric A9N18391 Acti9 C120N MCB, D Curve, 80 A,","metaDescription":"Schneider Electric A9N18391 Acti9 C120N miniature circuit breaker, 80 A rated current, D curve, 4 poles, 10 kA breaking capacity at 400 V AC. Sourced to order against RFQ.","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":"A9N18391","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60898-1 EN/IEC 60947-2","Curve code":"D","description":"Miniature circuit breaker (MCB), Acti9 C120N, 4P, 80A, D 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":"80 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":"10...14 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/dcdd21baf09b73c2bb90c6e692de2f35.pdf","sourceUrl":"https://www.se.com/be/en/product/A9N18391/miniature-circuit-breaker-mcb-acti9-c120n-4p-80a-d-curve-10000a-iec-en-608981-10ka-iec-en-609472/"},"ai":{"faq":[{"question":"Where can I buy A9N18391 and how is it quoted?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of A9N18391?","answer":"Rated current 80 A at 30 °C, D curve, 4 poles, breaking capacity 10 kA Icn at 400 V AC per EN/IEC 60898-1 and up to 20 kA Icu at 220–240 V AC per EN/IEC 60947-2."},{"question":"What compliance documentation does A9N18391 carry?","answer":"Certified to EN/IEC 60898-1 and EN/IEC 60947-2, with tropicalisation class 2 per IEC 60068-1, pollution degree 3, and overvoltage category IV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18391","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/A9N18391 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}}