{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4401-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4401-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4401-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4401-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4401-8CV miniature circuit breaker, Icu=15kA at 400V, 4-pole, D-curve, 1A rated current.","salesMarkdown":"The D-curve (10–20× In magnetic trip) is sized for high-inrush loads — small transformers, solenoid banks, motor starters. At 1 A rating, it protects the wiring to a control transformer or a PLC power supply, not a motor branch circuit. For a buyer filling a BOM line, the 5SY4401-8CV is a straightforward spec-in: the 15 kA Icu at 400 V matches what most European-style panel designs expect from a high-breaking-capacity MCB in a 4-pole D1 configuration. Snap-on DIN-rail mounting per EN 60715. The 4-pole body occupies four modular pitches (72 mm at 18 mm per pole). Terminal capacity accepts up to 25 mm² conductor — sufficient for the 1 A rating, but the lug size is set by the 15 kA breaking capacity, not the load current. Verify the busbar comb matches the 4-pole spacing if feeding from a common supply.","metaTitle":"Siemens 5SY4401-8CV MCB, 15kA 400V 4P D1","metaDescription":"Siemens 5SY4401-8CV MCB, Icu=15kA at 400V, 4-pole, D-curve, 1A. Current lifecycle stage. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"title":"5SY4401-8CV","description":"MCB Icu=15KA 400V 4P D1","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0969f40ef82bd291ccb73bca299fb215.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531607&mlfb=5SY4401-8CV"},"ai":{"faq":[{"question":"Where can I buy 5SY4401-8CV and get a price?","answer":"5SY4401-8CV is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SY4401-8CV?","answer":"The Icu (ultimate breaking capacity) is 15 kA at 400 V AC, 4-pole configuration with a D-curve trip characteristic."},{"question":"What compliance documentation is available for 5SY4401-8CV?","answer":"As a current-production Siemens 5SY series MCB, standard documentation includes CE declaration of conformity, RoHS and REACH compliance statements, and the product datasheet. Specific certificates (UL, CSA) should be verified per the target installation region."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4401-8CV","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SY4401-8CV 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}}