{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21415","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21415","canonicalUrl":"https://aoctrl.com/schneider/A9N21415","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21415","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ProDis DT40N miniature circuit breaker, A9N21415, 10 A rated, D-curve, 3P+N, 6 kA Icn / 10 kA Icu, dual-standard EN/IEC 60898-1 & 60947-2.","salesMarkdown":"The Schneider Electric A9N21415 is a DT40N miniature circuit breaker from the ProDis range, rated 10 A with a D-curve magnetic trip of 10...14 x In. That trip band is sized for loads with high inrush — think motor starters, small transformers, or capacitor banks — where a B- or C-curve would nuisance-trip on startup. The 3P+N configuration (three protected poles plus a switched neutral) suits three-phase distribution panels where the neutral needs to be disconnected with the phases. Breaking capacity is dual-rated: 6 kA Icn at 400 V AC per EN/IEC 60898-1 for general distribution, and 10 kA Icu at 400...415 V AC per IEC 60947-2 for industrial circuits with higher fault current. IP20 finger-safe terminals — standard for panel-mount, not for wet environments. It carries dual certification to EN/IEC 60898-1 and IEC 60947-2, plus NF quality label and tropicalisation class 2 per IEC 60068-1 (95 % RH at 55 °C). That dual standard is useful: the 60898-1 rating covers domestic/commercial distribution, while the 60947-2 rating satisfies industrial panel requirements — one part, two compliance boxes. ## Integration and deployment The 54 mm width (6 modules) occupies six 9 mm pitches in the enclosure — plan your rail fill accordingly. Neutral is on the left, which matches typical European panel layout conventions. Earth-leakage protection requires a separate block (not integrated). If you need RCD functionality, you'll add a downstream or companion residual-current device. The thermal-magnetic trip unit handles overload and short-circuit only.","metaTitle":"Schneider Electric A9N21415 DT40N MCB, 10 A, Curve D, 3P+N,","metaDescription":"Schneider Electric A9N21415 DT40N miniature circuit breaker, 10 A rated, D-curve, 3P+N, 6 kA Icn / 10 kA Icu, dual-standard EN/IEC 60898-1 & 60947-2. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"78 mm","Range":"Prodis","Width":"54 mm","Colour":"White","Height":"81 mm","Standards":"EN/IEC 60898-1 EN/IEC 60947-2","Curve code":"D","9 Mm Pitches":"6","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":"6000 A Icn at 400 V AC 50 Hz conforming to EN/IEC 60898-1 10 kA Icu at 400...415 V AC 50 Hz conforming to IEC 60947-2","Device short name":"DT40N","Network frequency":"50 Hz","Poles description":"3P + N","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"10 A","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":"10...14 x In","Earth-leakage protection":"Separate block","Number of protected poles":"3","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 400 V AC 50 Hz between phases","Ambient air temperature for storage":"-40...70 °C","Ambient air temperature for operation":"-25...70 °C","[Ics] rated service breaking capacity":"6000 A 100 % x Icn at 400 V AC 50 Hz conforming to EN/IEC 60898-1 7.5 kA 75 % x Icu at 400 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/c3edd890ae46a65687cfe8d6559924d7.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21415/dt40-circuit-breaker-dt40n-3p-+-n-10a-d-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21415/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of A9N21415?","answer":"6 kA Icn at 400 V AC per EN/IEC 60898-1, and 10 kA Icu at 400...415 V AC per IEC 60947-2."},{"question":"What is the D-curve trip range on this MCB?","answer":"Magnetic tripping occurs at 10...14 x In (100...140 A for the 10 A rating), designed for loads with high inrush current."},{"question":"Where can I buy A9N21415?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21415","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/A9N21415 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}}