{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP5280-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP5280-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SP5280-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SP5280-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SP5280-7CC miniature circuit-breaker, 440 V DC 10kA, 2-pole, C-curve, 80 A.","salesMarkdown":"The Siemens 5SP5280-7CC is a 2-pole miniature circuit-breaker rated for 440 V DC with a 10 kA breaking capacity, a C-trip curve, and an 80 A current rating. The 440 V DC rating is the key selection parameter here — this is not a standard AC miniature breaker. Most MCBs are AC-rated (230/400 V AC); a DC-rated breaker must handle the lack of a natural zero-crossing to extinguish the arc. The 2-pole configuration means both poles are switched simultaneously, which is required for DC circuits to ensure complete isolation. ## Deployment context In a solar combiner box, it protects the string conductors from reverse-current faults. In a UPS or battery bank, it provides branch-circuit protection on the DC bus. The 80 A rating is sized for a high-current DC feeder — think a 40–50 kW solar inverter input or a large battery rack.","metaTitle":"5SP5280-7CC Miniature Circuit-Breaker 440V DC 10kA 2-pole C","metaDescription":"5SP5280-7CC miniature circuit-breaker, 440V DC, 10kA breaking capacity, 2-pole, C-curve, 80A. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"title":"5SP5280-7CC","description":"Miniature circuit-breaker 440 V DC 10kA, 2-pole, C, 80 A","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0b498f5834d57c34a2d08b808b0c4a9f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1520849&mlfb=5SP5280-7CC"},"ai":{"faq":[{"question":"What is the 5SP5280-7CC used for?","answer":"It is a 2-pole miniature circuit-breaker for 440 V DC circuits, rated 80 A with a C-curve and 10 kA breaking capacity. Typical applications include solar combiner boxes, UPS battery banks, and industrial DC drive feeders."},{"question":"Where can I buy the 5SP5280-7CC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What does the C-curve mean on this DC MCB?","answer":"The C-curve means the magnetic trip operates at 5 to 10 times the rated current (400–800 A for this 80 A breaker). It is designed for loads with moderate inrush current, such as DC motors or capacitive loads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP5280-7CC","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/5SP5280-7CC 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}}