{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N18344","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N18344","canonicalUrl":"https://aoctrl.com/schneider/A9N18344","factsUrl":"https://aoctrl.com/api/mcp/products/A9N18344","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Acti9 C120N miniature circuit breaker, A9N18344, 63 A, B curve, 2 poles, 10 kA Icn at 400 V AC, thermal-magnetic trip, clip-on DIN rail mount.","salesMarkdown":"The Schneider Electric A9N18344 is an Acti9 C120N miniature circuit breaker rated 63 A at 30 °C, B curve, 2-pole, with a 10 kA Icn breaking capacity at 400 V AC per EN/IEC 60898-1. It also carries a 6 kA Icu rating at 440 V AC and 10 kA Icu at 380–415 V AC per EN/IEC 60947-2, which governs its use in industrial distribution panels where the higher fault-current headroom matters. The B curve means the magnetic trip fires between 3 and 5 times In — so for a 63 A breaker, instantaneous trip starts around 189 A and is guaranteed by 315 A. The 60947-2 rating of 10 kA Icu at 380–415 V AC gives you the fault-clearing confidence for a 400 V distribution board feeding downstream sub-circuits. Thermal-magnetic trip technology means it uses a bimetal strip for overload protection and a solenoid for short-circuit — no electronics to fail, no auxiliary power needed. The 63 A rating at 30 °C is the baseline; expect derating at higher ambient temperatures inside a crowded enclosure. The tunnel-type terminals accept 1–50 mm² rigid or 1.5–35 mm² flexible cable; strip 15 mm and torque to 3.5 N·m. Neutral is on the left, poles are protected, and the toggle gives clear ON/OFF indication. IP20 finger-safe front, so it lives inside an enclosure — not in a washdown zone.","metaTitle":"A9N18344 Acti9 C120N MCB, 63 A, B Curve, 2P, 10 kA","metaDescription":"Schneider Electric A9N18344 Acti9 C120N miniature circuit breaker, 63 A rated, B curve, 2 poles, 10 kA Icn at 400 V AC. Dual-rated to EN/IEC 60947-2 and 60898-1. Current production","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":"A9N18344","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60947-2 EN/IEC 60898-1","Curve code":"B","description":"C120N - circuit breaker - 2P - 63A - B curve","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":"1 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":"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":"3...5 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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0cbb712fe62efc7e13747315d830e35e.pdf","sourceUrl":"https://www.se.com/ae/en/product/A9N18344/c120n-circuit-breaker-2p-63a-b-curve/"},"ai":{"faq":[{"question":"Where can I buy A9N18344 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate."},{"question":"What is the breaking capacity of A9N18344 at 400 V?","answer":"The Icn rating is 10,000 A at 400 V AC per EN/IEC 60898-1. Under EN/IEC 60947-2, the Icu is 10,000 A at 380–415 V AC and 6,000 A at 440 V AC."},{"question":"What standards does the A9N18344 comply with?","answer":"It is dual-rated to EN/IEC 60947-2 and EN/IEC 60898-1, with suitability for isolation per IEC 60947-2. Pollution degree 3, overvoltage category IV, and tropicalisation class 2 per IEC 60068-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N18344","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/A9N18344 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}}