{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21023","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21023","canonicalUrl":"https://aoctrl.com/schneider/A9N21023","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21023","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Prodis DT40 MCB, 6 A, 1P+N, curve C, 4.5 kA / 6 kA breaking capacity, DIN-rail clip-on, 2 modules (18 mm width).","salesMarkdown":"The A9N21023: The 6 A rated current (In) sets the continuous load this MCB can carry without tripping — sized for a branch circuit drawing up to 6 A. The 4500 A Icn is the rated short-circuit capacity per the domestic-standard EN/IEC 60898-1; the 6 kA Icu is the ultimate breaking capacity per the industrial-standard IEC 60947-2, giving headroom for higher fault-current installations. The 1P+N configuration switches the phase and disconnects the neutral — common for single-phase final subcircuits in distribution boards. At 18 mm wide (2 x 9 mm pitches), it fits standard modular enclosures. Tunnel-type terminals accept 0.33–10 mm² flexible or 0.75–16 mm² rigid wire; strip length 13 mm, tighten to 2 N·m. IP20 finger-safe front. Complies with EN/IEC 60898-1 and EN/IEC 60947-2, pollution degree 3, overvoltage category IV. Separate earth-leakage block can be added alongside.","metaTitle":"Schneider Electric A9N21023 DT40 MCB, 6 A, 1P+N, Curve C, 4.","metaDescription":"Schneider Electric A9N21023 DT40 MCB, 6 A rated, 1P+N, curve C, breaking capacity 4.5 kA (Icn) / 6 kA (Icu). DIN-rail clip-on, 2 modules wide. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"78 mm","Range":"Prodis","Width":"18 mm","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60898-1 EN/IEC 60947-2","Curve code":"C","9 Mm Pitches":"2","Control type":"Toggle","Network type":"AC","Product name":"DT40","Mounting mode":"Clip-on","Quality labels":"NF","Tropicalisation":"2 conforming to IEC 60068-1","lifecycle_stage":"current","Limitation class":"3 conforming to EN/IEC 60898-1","Local signalling":"ON/OFF indication","Mounting support":"DIN rail","Neutral position":"Left","Pollution degree":"3 conforming to IEC 60947-2","Range of product":"ProDis","Breaking capacity":"4500 A Icn at 230 V AC 50 Hz conforming to EN/IEC 60898-1 6 kA Icu at 230...240 V AC 50 Hz conforming to IEC 60947-2","Device short name":"DT40","Network frequency":"50 Hz","Poles description":"1P + N","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"6 A","Overvoltage category":"IV","Trip unit technology":"Thermal-magnetic","Electrical durability":"20000 cycles","Mechanical durability":"20000 cycles","Wire stripping length":"13 mm","Connections - terminals":"Tunnel type terminals downstream 0.33...10 mm² flexible Tunnel type terminals downstream 0.75...16 mm² rigid Tunnel type terminals upstream 0.33...10 mm² flexible Tunnel type terminals upstream 0.75...16 mm² rigid","IP degree of protection":"IP20 conforming to IEC 60529","Magnetic tripping limit":"5...10 x In","Earth-leakage protection":"Separate block","Number of protected poles":"1","Product or component type":"Miniature circuit-breaker","Suitability for isolation":"Yes","Contact position indicator":"Yes","Locking options description":"Padlocking device","[Ui] rated insulation voltage":"400 V AC 50 Hz","[Ue] rated operational voltage":"230 V AC 50 Hz between phase and neutral","Ambient air temperature for storage":"-40...70 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"4500 A 100 % x Icn at 230 V AC 50 Hz conforming to EN/IEC 60898-1 4.5 kA 75 % x Icu at 230...240 V AC 50 Hz conforming to IEC 60947-2","[Uimp] rated impulse withstand voltage":"4 kV conforming to IEC 60947-2"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1f905e82634dd7ba05ad503d6a657b2e.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21023/dt40-circuit-breaker-dt40-1p-+-n-6a-c-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21023/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of A9N21023?","answer":"The breaking capacity is 4500 A Icn at 230 V AC per EN/IEC 60898-1, and 6 kA Icu at 230–240 V AC per IEC 60947-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21023","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/A9N21023 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}}