{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4402-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4402-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4402-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4402-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4402-8CV, miniature circuit breaker, 4-pole D-curve 2A, Icu=15kA at 400V AC.","salesMarkdown":"On a DIN-rail panel, the 4-pole format occupies four module widths and fits the standard 35 mm rail, so it swaps into existing Siemens 5SY distribution boards or any 4-pole slot in a commercial panel. Snap-on DIN-rail mount for 35 mm rail. The D-curve 2 A rating makes it a natural fit for protecting a small motor circuit (e.g., a fractional-horsepower fan or pump) or a control transformer primary where the inrush exceeds C-curve tolerance. Verify the load's starting current profile against the 10–20× In magnetic trip band to confirm no nuisance tripping on the first cycle.","metaTitle":"Siemens 5SY4402-8CV MCB, Icu=15kA 400V 4P D2","metaDescription":"Siemens 5SY4402-8CV miniature circuit breaker, 4-pole D-curve 2A, Icu=15kA at 400V. Lifecycle stage: current. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531609&mlfb=5SY4402-8CV","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4402-8CV/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of the 5SY4402-8CV?","answer":"Icu=15 kA at 400 V AC — the maximum fault current the breaker can safely interrupt under short-circuit conditions."},{"question":"What does the D-curve mean on this breaker?","answer":"The D-curve trips magnetically at 10–20 times the rated current (20–40 A instantaneous), designed for loads with high inrush like small motors or transformers."},{"question":"Where can I buy the 5SY4402-8CV?","answer":"The 5SY4402-8CV is sourced 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/siemens/5SY4402-8CV","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/5SY4402-8CV 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}}