{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4404-7CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4404-7CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4404-7CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4404-7CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY series, MCB, Icu=15kA 400V AC, 4-pole, C-curve, 4A rated current, order code 5SY4404-7CV.","salesMarkdown":"The Siemens 5SY4404-7CV is a 4-pole miniature circuit breaker (MCB) with a C-curve trip characteristic, rated 4 A. Its headline figure is a 15 kA breaking capacity (Icu) at 400 V AC — that means it can safely interrupt a fault current up to 15,000 amps without welding its contacts or failing catastrophically, which is the spec that determines whether this breaker coordinates with the upstream protective device in a panel. The C-curve (4 A) means the magnetic trip activates at 5 to 10 times rated current — 20 to 40 A — so it tolerates the inrush of small motor loads, transformers, or lighting ballasts without nuisance tripping, while still clearing a hard short. The 4-pole configuration (all poles switched) is typical for three-phase plus neutral circuits in IEC distribution boards; the 15 kA Icu at 400 V AC is the maximum short-circuit current the breaker can interrupt once. ## Panel integration Snap-on DIN rail mount, standard 18 mm per pole width (72 mm total for 4P). Busbar comb compatible via the tunnel terminals. Fits alongside other 5SY series devices in a Siemens ALPHA or SIVACON distribution board without special adapters.","metaTitle":"Siemens 5SY4404-7CV MCB, 15kA 400V 4P C4","metaDescription":"Siemens 5SY4404-7CV miniature circuit breaker, 4-pole C-curve 4A, 15kA breaking capacity at 400V AC. Current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"title":"5SY4404-7CV","description":"MCB Icu=15KA 400V 4P C4","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ae188811f5ef6e3eb019339601b29c41.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531612&mlfb=5SY4404-7CV"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4404-7CV?","answer":"15 kA (Icu) at 400 V AC, which is the maximum fault current this 4-pole C4 MCB can safely interrupt."},{"question":"Where can I buy the 5SY4404-7CV and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or price lists are published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4404-7CV","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/5SY4404-7CV 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}}