{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4503-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4503-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4503-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4503-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4503-5 miniature circuit breaker, 1P+N, 2-module width, Type A tripping characteristic, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity, 230 V AC / 60 V DC rated.","salesMarkdown":"The Type A tripping characteristic means it trips on short-circuit and overload with a defined time-current curve that sits between Type B and Type C — it handles moderate inrush without nuisance trips while still clearing faults fast enough for semiconductor protection in some applications. The neutral conductor is switched internally (1P+N), so the breaker isolates both poles when opened. This breaker carries three breaking capacity ratings depending on the standard applied: 10 kA per EN 60898-1 at 230 V AC, 35 kA per IEC 60947-2 at 230 V AC, and 5 kA per UL 1077 / CSA C22.2 No.235. For DC circuits, the rated breaking capacity is 15 kA at 60 V DC (max 72 V DC). The pollution degree 3 rating and overvoltage category III mean the 5SY4503-5 is designed for the fixed installation inside an industrial enclosure where transient overvoltages from the supply network are expected — not for outdoor or wet locations (IP20 only with conductors connected). The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No.235. Vibration resistance per IEC 60068-2-6 covers ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz, adequate for most industrial machinery.","metaTitle":"Siemens 5SY4503-5 SENTRON MCB, 1P+N, 10 kA, Type A","metaDescription":"Siemens 5SY4503-5 SENTRON miniature circuit breaker, 1P+N, 10 kA per EN 60898, 35 kA per IEC 60947-2, Type A characteristic. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY4503-5","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 230 V 10kA, 1+N-pole, A, 3 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"230 V","at DC rated value":"60 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"A","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"35 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage Of The Operating Voltage":"AC","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with single-phase operation at AC rated value":"250 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cb87b7d3f1463ea423a57bb4989b1669.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=393223&mlfb=5SY4503-5"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4503-5?","answer":"The 5SY4503-5 is rated 10 kA per EN 60898-1, 35 kA per IEC 60947-2 at 230 V AC, and 5 kA per UL 1077. For DC circuits it is rated 15 kA at 60 V DC (max 72 V DC)."},{"question":"What compliance documentation does Siemens provide for the 5SY4503-5?","answer":"The 5SY4503-5 is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free."},{"question":"How do I get current pricing and availability for the 5SY4503-5?","answer":"The 5SY4503-5 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will the 5SY4503-5 drop into a panel specified around the 5SY4140-7 without rewiring?","answer":"Both are 2-module wide (36 mm) SENTRON MCBs on the same DIN-rail footprint, so the mechanical swap is straightforward. However, the 5SY4503-5 is a 1P+N design with neutral switching, while the 5SY4140-7 is a different variant — verify the neutral connection and tripping characteristic (Type A vs the peer's characteristic) before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4503-5","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/5SY4503-5 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}}