{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18378","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18378","canonicalUrl":"https://aoctrl.com/schneider/A9N18378","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18378","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 C120N miniature circuit-breaker, A9N18378, 1P, D-curve, 63 A rated current, 10 kA Icn, clip-on 35 mm DIN rail.","salesMarkdown":"The Schneider Electric A9N18378 is a 1-pole miniature circuit-breaker from the Acti9 C120 range, rated 63 A at 30 °C with a D tripping curve. The D-curve magnetic trip fires at 10 to 14 times the rated current, so it avoids nuisance tripping on inductive loads while still clearing a hard fault. Rated Icn is 10000 A at 230/400 V AC per EN/IEC 60898-1, and the Icu per EN/IEC 60947-2 reaches 10 kA at 220...240 V AC and 3 kA at 380...415 V AC (IT system). That dual-rating means the breaker can serve both residential-style final circuits (60898-1) and industrial panel feeders (60947-2) — a single part number covers both compliance paths. Occupies 27 mm width (3 x 9 mm pitches) on the DIN rail. Tunnel terminals accept 1...50 mm² rigid or 1.5...35 mm² flexible; strip length 15 mm, tighten to 3.5 N.m. The toggle gives local ON/OFF indication and a contact position indicator confirms isolation status per IEC 60947-2.","metaTitle":"Schneider Electric A9N18378 Acti9 C120N MCB, 1P D 63 A, 10 k","metaDescription":"Schneider Electric A9N18378 Acti9 C120N miniature circuit-breaker, 1P, D-curve, 63 A, 10 kA Icn. Sourced to order against RFQ. EN/IEC 60898-1 & 60947-2.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"73 mm","Range":"Acti9","Width":"27 mm","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60898-1 EN/IEC 60947-2","Curve code":"D","9 Mm Pitches":"3","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":"3 kA Icu at 380...415 V AC 50/60 Hz IT conforming to EN/IEC 60947-2 20 kA Icu at 130 V AC 50/60 Hz conforming to EN/IEC 60947-2 15 kA Icu at 12 V DC conforming to EN/IEC 60947-2 15 kA Icu at 125 V DC conforming to EN/IEC 60947-2 10 kA Icu at 10 kA Icu at 220...240 V AC 50/60 Hz conforming to EN/IEC 60947-2 20 kA Icu at 12 V AC 50/60 Hz conforming to EN/IEC 60947-2 10000 A Icn at 230/400 V AC 50/60 Hz conforming to EN/IEC 60898-1","Device short name":"C120N","Network frequency":"50/60 Hz","Poles description":"1P","Relative humidity":"95 % at 55 °C","Tightening torque":"3.5 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"63 A at 30 °C","Overvoltage category":"IV","Trip unit technology":"Thermal-magnetic","Electrical durability":"10000 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":"Without","Number of protected poles":"1","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 125 V DC 12 V DC 220...240 V AC 50/60 Hz 230...400 V AC 50/60 Hz 130 V AC 50/60 Hz 12 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":"15 kA 75 % conforming to EN/IEC 60947-2 - 130 V AC 50/60 Hz 15 kA 100 % conforming to EN/IEC 60947-2 - 125 V DC 2.25 kA 75 % conforming to EN/IEC 60947-2 - 380...415 V AC 50/60 Hz 15 kA 100 % conforming to EN/IEC 60947-2 - 12 V DC 10 kA 100 % conforming to EN/IEC 60947-2 - 7.5 kA 75 % conforming to EN/IEC 60947-2 - 220...240 V AC 50/60 Hz 15 kA 75 % conforming to EN/IEC 60947-2 - 12 V AC 50/60 Hz 7500 A 75 % conforming to EN/IEC 60898-1 - 230/400 V AC 50/60 Hz","[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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8366a95bae0ba3f6d19ffc771ba31a46.pdf","sourceUrl":"https://www.se.com/ae/en/product/A9N18378/c120n-circuit-breaker-1p-63a-d-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N18378/alternatives.json"},"ai":{"faq":[{"question":"What is A9N18378's listed range (Acti9) on this component line?","answer":"It belongs to the Acti9 range, specifically the Acti9 C120 product family, with the device short name C120N."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18378","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/A9N18378 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}