{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7250-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7250-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7250-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7250-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7250-8CC miniature circuit breaker, D tripping curve, 50 A rated, 2-pole, 400 V AC, 15 kA IEC 60947-2, 5 kA UL 1077.","salesMarkdown":"## What this 50 A D-curve MCB means for your panel That D curve means it's built for loads with a high inrush — think motor starters, transformers, or welding equipment — where the magnetic trip kicks in at 10 to 20 times rated current to avoid nuisance trips on startup. For UL 1077 applications, it's listed at 5 kA. ## Sizing and selectivity in the real world At 50 A and 400 V, this MCB sits in the middle of the 5SY7 range — big enough for a moderate motor branch or a subfeed, but not a main breaker. The D curve gives you headroom for motor starting currents that can hit 8–12× FLA for a few cycles. The 10 000 mechanical switching cycles are typical for a panelboard breaker — plenty for a fixed installation, not for daily load switching. ## Mounting and environment — what fits where It mounts in any position, which helps in tight enclosures.","metaTitle":"Siemens 5SY7250-8CC SENTRON MCB, 50 A, D Curve, 2-Pole","metaDescription":"Siemens 5SY7250-8CC SENTRON miniature circuit breaker, 50 A rated, D tripping characteristic, 2-pole, 400 V AC, 15 kA IEC breaking capacity. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"2","Number of poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY7CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"50 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d44971a12244803a1dc96da48a2e5302.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=72526&mlfb=5SY7250-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7250-8CC/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 5SY7250-8CC?","answer":"It's a 2-pole, 50 A, D-curve miniature circuit breaker rated 400 V AC (440 V multi/single-phase). Breaking capacity is 15 kA per IEC 60947-2 and 5 kA per UL 1077. Maximum DC voltage is 72 V."},{"question":"Will 5SY7250-8CC drop into a panel specified around 5SY7140-8CC?","answer":"Physically yes — same 2-pole, 2-width-unit (36 mm) DIN-rail footprint, same depth and mounting. The difference is rating: the 5SY7140-8CC is a 40 A breaker, while this is 50 A. If your panel was wired and coordinated for 40 A, swapping to 50 A may require checking conductor sizing and upstream device coordination."},{"question":"Where can I buy 5SY7250-8CC and how is it quoted?","answer":"We source and quote this part to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or price is published here. Submit an RFQ for a firm commercial offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7250-8CC","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/5SY7250-8CC 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}}