{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"A9N21367","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"A9N21367","canonicalUrl":"https://aoctrl.com/schneider/A9N21367","factsUrl":"https://aoctrl.com/api/mcp/products/A9N21367","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Prodis DT40N, A9N21367, miniature circuit breaker (MCB), 1P+N, 20 A rated, Curve C, 6 kA Icn / 10 kA Icu, clip-on DIN rail mount, IP20.","salesMarkdown":"Breaking capacity is rated 6000 A Icn at 230 V AC per EN/IEC 60898-1 (the standard for household MCBs) and 10 kA Icu at 230…240 V AC per IEC 60947-2 (the industrial standard for circuit-breakers). The 20 A rating, combined with the 6 kA Icn, fits typical 2.5 mm² copper final subcircuits on a 50 Hz network. Clip-on mounting to a DIN rail (35 mm symmetrical rail per EN 60715) and a width of 18 mm (2 x 9 mm pitches) means it occupies a single module slot in a distribution board. ## Sourcing and lifecycle — active line, no obsolescence concern Compliance documentation is straightforward: the breaker is certified to EN/IEC 60898-1 and EN/IEC 60947-2, carries NF quality label, and is tropicalised per IEC 60068-1 (2 levels). The dual-standard certification covers both residential and light industrial approvals in one part number. ## Integration — what fits where Terminals accept tunnel-type connections: upstream and downstream both take 0.75…16 mm² rigid or 0.33…10 mm² flexible copper. The neutral position is left, and the toggle control gives clear ON/OFF local indication. Earth-leakage protection requires a separate block — this MCB does not include integral RCD. Mechanical and electrical durability are both rated at 20,000 cycles — typical for a panelboard MCB, not a frequent-switching contactor. Operating altitude is 2000 m; relative humidity up to 95% at 55 °C. Overvoltage category IV means it is suitable for the origin of the installation, not just downstream sub-distribution.","metaTitle":"Schneider Electric A9N21367 DT40N MCB, 20 A, 1P+N, Curve C,","metaDescription":"Schneider Electric A9N21367 Prodis DT40N MCB, 20 A rated, 1P+N, Curve C, 6 kA (Icn) / 10 kA (Icu) breaking capacity. Active production. Sourced to order. Request 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":"6000 A Icn at 230 V AC 50 Hz conforming to EN/IEC 60898-1 10 kA Icu at 230...240 V AC 50 Hz conforming to IEC 60947-2","Device short name":"DT40N","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":"20 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":"7.5 kA 75 % x Icn at 230 V AC 50 Hz conforming to IEC 60947-2 6000 A 100 % x Icn at 230 V AC 50 Hz conforming to EN/IEC 60898-1","[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/229976363f42f6a540ab0885383cb8be.pdf","sourceUrl":"https://www.se.com/uk/en/product/A9N21367/dt40-circuit-breaker-dt40n-1p-+-n-20a-c-curve/","alternativesUrl":"https://aoctrl.com/api/mcp/products/A9N21367/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for A9N21367?","answer":"The A9N21367 is sourced and quoted to order against an RFQ through independent distribution channels. Current pricing and availability are confirmed at quote time — submit an RFQ for a firm price and lead-time commitment."},{"question":"What is the breaking capacity of A9N21367?","answer":"The A9N21367 is rated 6000 A Icn at 230 V AC per EN/IEC 60898-1 and 10 kA Icu at 230…240 V AC per IEC 60947-2, giving dual residential and light industrial certification."},{"question":"What is the closest alternative to A9N21367 in the Prodis family?","answer":"Within the same Prodis DT40N series, the closest sibling is a different current rating (e.g., 16 A or 25 A) or a different curve (B or D). The A9N21367 is the 20 A, Curve C, 1P+N variant — the pole count and curve are the deciding factors for fit, not the current rating."},{"question":"What compliance documentation does Schneider provide for A9N21367?","answer":"The A9N21367 is certified to EN/IEC 60898-1 and EN/IEC 60947-2, carries the NF quality label, and is tropicalised per IEC 60068-1 (2 levels). Pollution degree 3 per IEC 60947-2 is also declared."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/A9N21367","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/A9N21367 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}}