{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21398","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21398","canonicalUrl":"https://aoctrl.com/schneider/A9N21398","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21398","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric ProDis DT40N miniature circuit breaker, A9N21398, 25 A rated, D curve, 3-pole, 6 kA Icn / 10 kA Icu, thermal-magnetic trip, clip-on DIN rail mount.","salesMarkdown":"It's a 3-pole unit, thermal-magnetic, designed for distribution boards on 50 Hz AC networks. Breaking capacity is 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. That dual rating means it's certified under both the household-standard (60898-1) and the industrial-standard (60947-2) — useful when the same panel feeds both lighting and motor loads and you need the higher fault-current rating for the industrial side. Pollution degree 3 per IEC 60947-2, so it's rated for the conductive-dust and condensation environment you'd expect in a typical industrial panel, not a clean office sub-board. Tunnel-type terminals accept 0.33–10 mm² flexible or 0.75–16 mm² rigid upstream and downstream. Tightening torque 2 N.m, strip length 13 mm. Separate earth-leakage protection block can be added alongside if needed.","metaTitle":"Schneider Electric A9N21398 DT40N MCB, 25 A, D Curve, 3P, 6","metaDescription":"Schneider Electric A9N21398 DT40N miniature circuit breaker, 25 A rated, D curve, 3-pole, 6 kA Icn / 10 kA Icu. Active production. Sourced to order against RFQ.","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","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","Relative humidity":"95 % at 55 °C","Tightening torque":"2 N.m","Device application":"Distribution","Operating altitude":"2000 m","[In] rated current":"25 A","Trip unit technology":"Thermal-magnetic","Electrical durability":"10000 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":"440 V AC 50 Hz","[Ue] rated operational voltage":"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/4118c4fc9269405ddd3d049c0c440cf1.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21398/dt40-circuit-breaker-dt40n-3p-25a-d-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21398/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for A9N21398?","answer":"The part is sourced to order through independent distribution. Submit an RFQ for current pricing and availability confirmation at quote time."},{"question":"What is A9N21398's breaking capacity?","answer":"It has a breaking capacity of 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 compliance documentation does this brand provide for A9N21398?","answer":"The breaker carries NF quality label certification and complies with EN/IEC 60898-1 and EN/IEC 60947-2 standards. Tropicalisation class 2 per IEC 60068-1 and limitation class 3 per EN/IEC 60898-1 are also specified."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21398","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/A9N21398 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}}