{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4503-8CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4503-8CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4503-8CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4503-8CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4503-8CC11 miniature circuit breaker, 2-pole (1P+N), 3 A rated current, D tripping characteristic, 10 kA breaking capacity at 230 V AC, for railway applications.","salesMarkdown":"It breaks 10 kA at 230 V AC per EN 60898, which means it handles high inrush loads like motor starters or transformer primaries without nuisance tripping — the D curve allows 10–20× rated current for short spikes. Designed for railway applications, it carries an overvoltage category III rating and operates from -40 to +70 °C ambient. Terminals accept 0.75 to 35 mm² solid or stranded copper, torqued to 2.5–3.5 N·m. Both top and bottom have combined terminals (neutral and phase), and the neutral pole is switched. Sealable and touch-protected per IP20 with connected conductors. Halogen-free and silicon-free construction. Storage range -40 to +75 °C; ambient operating range -40 to +70 °C. Humidity tolerance: max 95% at 55 °C, derating to 55% at 70 °C and 35% at 75 °C. Mounting position any; power supply cord position any. Designed per DIN EN 61346-2 and DIN EN 81346-2 (function code F).","metaTitle":"Siemens 5SY4503-8CC11 SENTRON MCB, 2-pole 3A D-curve, 10kA","metaDescription":"Siemens 5SY4503-8CC11 SENTRON miniature circuit breaker, 2-pole 1P+N, 3A D-curve, 10kA breaking capacity per EN 60898. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","title":"5SY4503-8CC11","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 230 V 10kA, 1+N-pole, D, 3 A 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":"230 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Design of the product":"For railway applications","Number of width units":"2","Number of poles / Note":"1P+N","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":"3 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":"Yes","with single-phase operation / at AC / rated value":"250 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/d0006656f925577ad4219358c5a156e2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=472576&mlfb=5SY4503-8CC11"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4503-8CC11?","answer":"10 kA at 230 V AC per EN 60898, with a maximum DC voltage of 72 V."},{"question":"What wire sizes does the 5SY4503-8CC11 accept?","answer":"Solid or stranded copper from 0.75 mm² up to 35 mm², torqued to 2.5–3.5 N·m."},{"question":"Where can I buy 5SY4503-8CC11 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Submit a request with target quantity for availability and current pricing."},{"question":"Will 5SY4503-8CC11 drop into a panel specified around 5SY3132-6 without rewiring?","answer":"Both are 2-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY4503-8CC11 is a 1P+N design with a switched neutral, while the 5SY3132-6 is a 2-pole without neutral switching. Verify the panel's neutral bus wiring before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4503-8CC11","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/5SY4503-8CC11 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}}