{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4503-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4503-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4503-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4503-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4503-7, miniature circuit breaker, 1P+N, C-curve, 10 kA (IEC 60898) / 35 kA (IEC 60947-2), 2-module width, IP20.","salesMarkdown":"## Siemens 5SY4503-7 — SENTRON MCB for 1P+N Switched-Neutral Circuits That matters for any circuit where you need positive isolation of both conductors on fault or maintenance disconnect, common in single-phase sub-distribution or lighting panels where the neutral must be broken. At DC (60 V nominal, 72 V max) it interrupts 15 kA per IEC 60947-2, and under UL 1077 it is listed for 5 kA at 250 V AC single-phase. ## Sourcing & Lifecycle — Active Production, No LTB Signal For a buyer freezing a BOM or stocking a spares cabinet, the active status means no forced redesign or substitute qualification is imminent. The part carries IEC 60898-1, IEC 60947-2, and UL 1077 approvals, covering installations under European, North American, and CSA jurisdictions. ## DIN-Rail Fit & Panel Integration Width is 36 mm (2 modular units), depth 76 mm, installation depth 70 mm — fits standard 35 mm DIN rail. The quick-assembly fastening system clips on without tools. ## Environmental & Mechanical Endurance Ambient temperature range from -40 °C to 75 °C, with humidity derating: max 95% RH at 55 °C, tapering to 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz — survives typical machine-mounted panel vibration. Energy limitation class 3 — the breaker limits let-through energy to the lowest level per IEC 60898, reducing thermal stress on downstream wiring and equipment during a short-circuit event.","metaTitle":"Siemens 5SY4503-7 SENTRON MCB, C-Curve 1P+N, 10kA IEC 60898","metaDescription":"Siemens 5SY4503-7 SENTRON miniature circuit breaker, 1P+N, C-curve, 10 kA per IEC 60898 / 35 kA per IEC 60947-2. Active production. Sourced to order. RFQ for pricing and availabili","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","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","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","Energy Limitation Class":"3","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":"C","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":"1.3 W"}},"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=325495&mlfb=5SY4503-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4503-7/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 5SY4503-7?","answer":"The breaker 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. Standard Siemens documentation includes CE declaration, RoHS/REACH compliance statements, and a vibration test report per IEC 60068-2-6."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4503-7","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/5SY4503-7 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}}