{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5263-6KK11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5263-6KK11","canonicalUrl":"https://aoctrl.com/siemens/5SY5263-6KK11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5263-6KK11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5263-6KK11 miniature circuit breaker, 2-pole, B characteristic, 63 A rated current, 10 kA breaking capacity per EN 60898, 400 V AC / 440 V DC, 2 width units (36 mm).","salesMarkdown":"The Siemens SENTRON 5SY5263-6KK11 is a 2-pole miniature circuit breaker with B tripping characteristic, rated 63 A at 400 V AC and 440 V DC. Rated for universal current (AC/DC), so it handles DC control circuits up to 440 V without derating the breaking capacity — a useful trait in panels mixing AC distribution and DC auxiliary supplies. Mounting position is any; the quick-assembly system clips onto the rail without tools. Top and bottom terminals are combined (clamp-type), and the unit is sealable for tamper-proofing after commissioning. Ambient temperature range -40 to +70 °C covers most indoor and outdoor cabinet installations, though the thermal-magnetic trip characteristic shifts with temperature; the humidity derating curve (max 95% RH up to 55 °C, then decreasing) should be noted for sealed cabinets in tropical climates. Designed for railway applications per the product designation, though it carries standard EN 60898 / EN 60898-2 breaking capacity ratings rather than a dedicated railway standard like EN 50155. Touch protection is integral (finger-safe terminals when wired). The product is classified per DIN EN 61346-2 and DIN EN 81346-2 as function code F (protective device).","metaTitle":"Siemens 5SY5263-6KK11 SENTRON MCB, 63A 2P B-curve, 10kA","metaDescription":"Siemens SENTRON 5SY5263-6KK11 miniature circuit breaker, 63 A, 2-pole, B characteristic, 10 kA breaking capacity at 400 V AC. Current production lifecycle. Sourced to order. Reques","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +70 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","at DC / rated value":"440 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Design of the product":"For railway applications","Energy limiting class":"3","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","Suitability for operation":"universal current","at DC / acc. to EN 60898-2":"10 kA","Current / at AC / rated value":"63 A","Tripping characteristic class":"B","at DC / rated value / maximum":"500 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"AC as required, observe DC polarity","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 DC / acc. to IEC 60947-2 / rated value":"15 kA","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","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":"5 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in","AWG number / as coded connectable conductor cross section":"18 ... 4"}},"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=118504&mlfb=5SY5263-6KK11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY5263-6KK11/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY5263-6KK11 and how do I get a price?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — no stock or price figures are published here, but the active lifecycle means it is regularly available."},{"question":"What conductor sizes does 5SY5263-6KK11 accept?","answer":"Solid conductors from 0.75 mm² up to 35 mm², and stranded conductors from 0.75 mm² up to 35 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5263-6KK11","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/5SY5263-6KK11 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}}