{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4263-8CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4263-8CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4263-8CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4263-8CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4263-8CC11 miniature circuit breaker, 2-pole, D tripping characteristic, 63 A rated current, 10 kA breaking capacity at 400 V AC.","salesMarkdown":"## 63 A D-curve MCB for inductive loads and railway panels The Siemens SENTRON 5SY4263-8CC11 is a 2-pole miniature circuit breaker rated 63 A with a D tripping characteristic, designed to handle high inrush currents from motor starters, transformers, and welding equipment — common in industrial and railway auxiliary circuits. Its 10 kA breaking capacity at 400 V AC (per EN 60898) means it can safely interrupt a fault up to that level without upstream damage, provided the panel SCCR is coordinated. The D curve holds through short-duration surges (10–20× rated current) before tripping, so it won't nuisance-trip on a motor start. Terminal accepts solid or stranded copper from 0.75 to 35 mm²; tightening torque 2.5 to 3.5 N·m. Rated for ambient temperatures from -40 to +70 °C, storage from -40 to +75 °C. Halogen-free and silicon-free construction. Overvoltage category III, touch protection integrated. Designed for railway applications per the product designation, with humidity tolerance up to 95% at 55 °C.","metaTitle":"Siemens 5SY4263-8CC11 SENTRON MCB, 63 A, D Curve, 2-Pole, 10","metaDescription":"Siemens SENTRON 5SY4263-8CC11 miniature circuit breaker, 63 A, D tripping characteristic, 2-pole, 10 kA breaking capacity at 400 V AC. Current lifecycle stage, available 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","Solid":"0.75 ... 35 mm²","Width":"36 mm","title":"5SY4263-8CC11","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 2-pole, D, 63A for railway applications","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","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","Overvoltage category":"III","Combined Terminal Top":"Yes","Design of the product":"For railway applications","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":"Mechanical engineering / industry","Current / at AC / rated value":"63 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","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","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":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a17d77ff48ce0b8ad34e970f80157267.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=40663&mlfb=5SY4263-8CC11"},"ai":{"faq":[{"question":"Where can I buy 5SY4263-8CC11?","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 is the breaking capacity of 5SY4263-8CC11?","answer":"10 kA at 400 V AC per EN 60898, which covers most industrial panel fault levels."},{"question":"Will 5SY4263-8CC11 drop into a panel specified around 5SY7140-8CC?","answer":"Both are 2-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY7140-8CC is a 40 A B-curve unit — the 63 A D-curve 5SY4263-8CC11 is a different rating and characteristic, so verify coordination before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4263-8CC11","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/5SY4263-8CC11 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}}