{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4263-7KK11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4263-7KK11","canonicalUrl":"https://aoctrl.com/siemens/5SY4263-7KK11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4263-7KK11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4263-7KK11, 2-pole miniature circuit breaker, C-curve, 63 A at 35 °C, breaking capacity 10 kA (EN 60898) / 15 kA (IEC 60947-2), IP20, for railway applications.","salesMarkdown":"It carries a C-curve trip characteristic, meaning it handles moderate inrush currents — typical for motor and transformer loads — before tripping magnetically. The 63 A rating at 35 °C is the headline number, but the real-world capacity drops as ambient temperature rises: 59.16 A at 40 °C, 57.14 A at 45 °C, 55.06 A at 50 °C, 52.92 A at 55 °C, and 50.65 A at 60 °C. ## DIN-rail integration and mounting Mounting position is any orientation; the breaker works upright, sideways, or inverted.","metaTitle":"Siemens 5SY4263-7KK11 SENTRON MCB, 2P C-curve 63 A, 10 kA","metaDescription":"Siemens SENTRON 5SY4263-7KK11 miniature circuit breaker, 2-pole, C-curve, 63 A rated at 35 °C, 10 kA (EN 60898) / 15 kA (IEC 60947-2). Railway-rated, IP20, quick-assembly. Availabl","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","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"63 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"63 A","at 40 °C / rated value":"59.16 A","at 45 °C / rated value":"57.14 A","at 50 °C / rated value":"55.06 A","at 55 °C / rated value":"52.92 A","at 60 °C / rated value":"50.65 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=36629&mlfb=5SY4263-7KK11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4263-7KK11/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4263-7KK11 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for a firm price and availability confirmation at quote time."},{"question":"What is 5SY4263-7KK11's listed depth (76 mm) on this component line?","answer":"The overall depth is 76 mm, with an installation depth of 70 mm — the difference accounts for the front projection of the toggle and terminal covers."},{"question":"What compliance documentation does this brand provide for 5SY4263-7KK11 (RoHS, REACH, UL, IEC)?","answer":"The breaker is designed to EN 60898 and IEC 60947-2, carries overvoltage category III and pollution degree 3, and is rated for railway applications. It is halogen-free and silicon-free. For specific RoHS/REACH/UL declarations, the manufacturer provides compliance documentation on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4263-7KK11","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/5SY4263-7KK11 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}}