{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5125-6CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5125-6CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY5125-6CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5125-6CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY5125-6CC11, 1-pole miniature circuit breaker, B-curve, 25 A, 10 kA breaking capacity, 220 V DC / 230/400 V AC, for railway applications.","salesMarkdown":"## Railway-rated MCB with B-curve and 10 kA breaking capacity The Siemens 5SY5125-6CC11 is a 1-pole miniature circuit breaker rated 25 A with a B-curve trip characteristic, delivering a 10 kA breaking capacity at both 230/400 V AC and 220 V DC. This is a railway-classified unit — the 220 V DC rating and the 10 kA SCCR make it suitable for DC auxiliary circuits in rolling stock and wayside equipment, not just standard AC panelboard duty. ## Voltage rating and DC capability Rated for 230/400 V AC and 220 V DC — the DC rating is the key differentiator here. Most standard B-curve MCBs top out at 48–60 V DC; this one handles 220 V DC at the full 10 kA breaking capacity, which means it can protect DC bus feeds, battery circuits, and signalling supplies in railway environments without needing a series-connected second pole. Listed as current production. No official successor or cross-reference.","metaTitle":"Siemens 5SY5125-6CC11 1-Pole MCB, B-Curve 25A, 10kA","metaDescription":"Siemens 5SY5125-6CC11 miniature circuit breaker, 1-pole, B-curve, 25 A, 10 kA breaking capacity at 230/400 V AC and 220 V DC. Railway-rated.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"title":"5SY5125-6CC11","description":"Circuit breaker Universal current 220 V DC 230/400 V AC 10kA, 1-pole, B, 25A for railway applications","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ced316d41ac566c54fda3788e0302731.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=137466&mlfb=5SY5125-6CC11"},"ai":{"faq":[{"question":"Can Siemens 5SY5125-6CC11 be used for DC circuits?","answer":"Yes — rated 220 V DC at 10 kA breaking capacity, making it suitable for DC auxiliary and signalling circuits in railway applications."},{"question":"What is the breaking capacity of Siemens 5SY5125-6CC11?","answer":"10 kA at both 230/400 V AC and 220 V DC."},{"question":"How can I order the Siemens 5SY5125-6CC11?","answer":"Sourced to order against RFQ. Availability and pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5125-6CC11","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/5SY5125-6CC11 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}}