{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4503-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4503-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4503-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4503-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4CC series miniature circuit breaker, 2-pole 1P+N, D tripping characteristic, rated current 3 A AC, breaking capacity 10 kA per EN 60898, 36 mm wide, IP20 with connected conductors.","salesMarkdown":"Its D tripping characteristic (10–20× In magnetic trip) handles high inrush loads like motors, transformers, and solenoid banks without nuisance trips — the 3 A rating is sized for smaller inductive circuits, not general lighting or resistive loads. The 10 kA breaking capacity per EN 60898 (5 kA per UL 1077/CSA C22.2 No.235) covers most industrial panel fault levels; the 1P+N configuration switches the phase and switches the neutral, which matters when you need neutral isolation in a single-module footprint. ## Mounting and wiring — the panel-builder's read Snaps onto DIN rail via the quick-assembly system — 36 mm wide (2 width units), 90 mm tall, 76 mm deep with 70 mm installation depth behind the panel. Tightening torque 2.5–3.5 N·m. Sealable cover option is present if the spec calls for lockout/tagout. Mounting position any; ambient -25 to +55 °C, storage -40 to +75 °C.","metaTitle":"Siemens 5SY4503-8CC SENTRON MCB, 2-pole 1P+N, D-curve, 3 A,","metaDescription":"Siemens 5SY4503-8CC SENTRON miniature circuit breaker, 2-pole 1P+N, D-curve, 3 A, 10 kA breaking capacity per EN 60898. Active production. Available to order. Request RFQ for prici","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":"5SY4503-8CC","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","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":"-25 ... +55 °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","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","circuit-breaker / Design":"5SY4CC","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","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","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/926b31aed3482b9b37221c3b2079a839.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=122777&mlfb=5SY4503-8CC"},"ai":{"faq":[{"question":"Where can I buy 5SY4503-8CC and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — no stock count or price is published here."},{"question":"What is 5SY4503-8CC's listed depth?","answer":"76 mm overall depth, with 70 mm installation depth behind the panel front."},{"question":"What conductor sizes does the terminal accept?","answer":"Solid and stranded copper from 0.75 mm² up to 35 mm². Tightening torque 2.5–3.5 N·m."},{"question":"Will 5SY4503-8CC drop into a panel specified around 5SY7140-8CC without rewiring?","answer":"Both are 36 mm wide DIN-rail MCBs with similar terminal ranges, but 5SY7140-8CC is a higher-current (40 A) B-curve device — different trip characteristic and rating. The 5SY4503-8CC at 3 A D-curve serves a different branch. Mechanical fit is the same footprint; electrical substitution depends on the circuit's fault and load requirements."},{"question":"What compliance documentation does Siemens provide for 5SY4503-8CC?","answer":"The MCB carries EN 60898 (10 kA) and UL 1077 / CSA C22.2 No.235 (5 kA) ratings. Halogen-free and silicon-free construction. Standard Siemens declarations for RoHS, REACH, and CE are available with the product documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4503-8CC","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/5SY4503-8CC 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}}