{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4314-7CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4314-7CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4314-7CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4314-7CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY series MCB, 3-pole C0.3, Icu=15kA at 400V, current lifecycle stage.","salesMarkdown":"The Siemens 5SY4314-7CV is a 3-pole miniature circuit breaker with a C-curve rated at 0.3 A and a breaking capacity of 15 kA at 400 V. The C-curve (5–10x In magnetic trip) suits it for mixed resistive and light inductive loads where moderate inrush is expected, not motor starting. The 0.3 A rating is unusually low for a 3-pole MCB — this is a specialty breaker for protecting instrumentation, control transformers, or small-signal circuits where a standard 1 A or higher breaker would not trip on a low-current fault. Three poles with a shared C-curve mean all phases trip together on an overcurrent on any one pole, which matters for 3-phase control circuits where single-phasing could damage equipment. ## Integration Notes Mounts on standard DIN rail in the enclosure. The C0.3 curve is sensitive: verify the connected load's inrush characteristic stays below 1.5 A (5x rated) to avoid nuisance tripping. Panel fill factor is standard for a 3-pole MCB — 3 module widths (approx. 54 mm) on the rail.","metaTitle":"Siemens 5SY4314-7CV MCB, 15kA 400V 3P C0.3, Current Lifecycl","metaDescription":"Siemens 5SY4314-7CV MCB rated Icu=15kA at 400V, 3-pole, C-curve 0.3A. Current lifecycle stage. Sourced to order against RFQ through independent distribution.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"title":"5SY4314-7CV","description":"MCB Icu=15KA 400V 3P C0.3","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7185650290f0fc80d83c702e23bc4d15.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531588&mlfb=5SY4314-7CV"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4314-7CV?","answer":"It has an Icu of 15 kA at 400 V, meaning it can safely interrupt fault currents up to that level."},{"question":"Where can I buy the 5SY4314-7CV?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4314-7CV","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/5SY4314-7CV 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}}