{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18393","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18393","canonicalUrl":"https://aoctrl.com/schneider/A9N18393","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18393","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 C120N, A9N18393, miniature circuit breaker, 4P, 125 A, D curve, thermal-magnetic trip, 10 kA Icn at 400 V AC.","salesMarkdown":"The Schneider Electric A9N18393 is an Acti9 C120N miniature circuit breaker rated 125 A at 30 °C, 4-pole, with a D curve that trips magnetically at 10...14 × In. That magnetic threshold means it holds through high inrush from motor starts or transformer energization — the D curve is the one you spec when the load isn't purely resistive and you need the branch to stay closed during the first few cycles. Breaking capacity is 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. At 220...240 V AC the Icu jumps to 20 kA, and at 380...415 V AC it holds 10 kA Icu. That dual-standard rating means the same breaker fits both residential (60898-1) and industrial (60947-2) coordination studies — the 60947-2 numbers are what a panel builder uses for SCCR on the nameplate. ## DIN rail and panel fit The breaker takes 12 × 9 mm pitch modules — 108 mm wide — so it fills a standard 12-module slot in a distribution board. Tunnel terminals accept 1...50 mm² rigid or 1.5...35 mm² flexible, with a 3.5 N·m tightening torque and 15 mm strip length. That wire range covers the 125 A feed with 25 or 35 mm² tails without needing a reducer lug.","metaTitle":"Schneider Electric A9N18393 Acti9 C120N MCB, 125A 4P D Curve","metaDescription":"Schneider Electric A9N18393 Acti9 C120N miniature circuit breaker, 125A rated current, 4-pole, D curve, 10 kA breaking capacity at 400 V. Active production. Quoted to order.","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":"A9N18393","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60898-1 EN/IEC 60947-2","Curve code":"D","description":"C120N - circuit breaker - 4P - 125A - D curve","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":"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/d98af2818a7b11ade2162acf0b090cd2.pdf","sourceUrl":"https://www.se.com/ae/en/product/A9N18393/c120n-circuit-breaker-4p-125a-d-curve/"},"ai":{"faq":[{"question":"What is the breaking capacity of the A9N18393?","answer":"10 kA Icn at 400 V AC per EN/IEC 60898-1, and 6 kA Icu at 440 V AC, 20 kA Icu at 220...240 V AC, and 10 kA Icu at 380...415 V AC per EN/IEC 60947-2."},{"question":"Where can I buy the A9N18393 and get a price?","answer":"The A9N18393 is sourced and quoted to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18393","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/A9N18393 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}}