{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4502-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4502-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4502-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4502-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4502-8 miniature circuit breaker, D-curve, 2 A rated, 1P+N, 10 kA (IEC 60898) / 35 kA (IEC 60947-2), 2 MW (36 mm) wide, IP20.","salesMarkdown":"The Siemens SENTRON 5SY4502-8 is a D-curve miniature circuit breaker rated at 2 A AC, 1P+N (switched neutral), occupying 2 modular width units (36 mm) on a DIN rail. It carries a 10 kA breaking capacity per IEC 60898-1 and 35 kA per IEC 60947-2 / UL1077, making it suitable for high-fault-current industrial panels where the D-curve delays tripping on inrush — typical for motor-starting or transformer-fed loads. ## D-curve and derating — what matters for panel fit The D-curve characteristic (tripping between 10× and 20× In) is designed to ride through the high inrush of motor-starting or transformer primary energisation without nuisance trips. At 2 A rated, that means the magnetic trip holds up to roughly 20–40 A peak. The thermal derating is published: 2 A at 35 °C, 1.9 A at 40 °C, 1.85 A at 45 °C, 1.8 A at 50 °C, 1.75 A at 55 °C, and 1.7 A at 60 °C — so in a warm enclosure, size up accordingly if continuous load approaches the 2 A line. Snap-on 36 mm width (2 MW) fits standard DIN-rail enclosures. IP20 with connected conductors.","metaTitle":"Siemens 5SY4502-8 SENTRON MCB, D-curve 2 A 1P+N, 10 kA IEC","metaDescription":"Siemens SENTRON 5SY4502-8 miniature circuit breaker, D-curve, 2 A, 1P+N, 10 kA (IEC 60898) / 35 kA (IEC 60947-2), 2 MW wide, current lifecycle, sourced to order against RFQ.","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":"2 A","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","at 35 °C rated value":"2 A","at 40 °C rated value":"1.9 A","at 45 °C rated value":"1.85 A","at 50 °C rated value":"1.8 A","at 55 °C rated value":"1.75 A","at 60 °C rated value":"1.7 A","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","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":"D","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 (Switching 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":"1.2 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=67061&mlfb=5SY4502-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4502-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4502-8?","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":"Will 5SY4502-8 drop into a panel specified around 5SY4115-7CV without rewiring?","answer":"Both are 2 MW (36 mm) wide SENTRON MCBs with the same DIN-rail footprint and terminal layout, so physical fit is identical — but verify the rating and curve: 5SY4115-7CV is a B-curve 15 A, while this is a D-curve 2 A. If the panel was wired for 15 A B-curve, the 2 A D-curve will not carry the same load and the curve difference changes coordination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4502-8","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/5SY4502-8 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}}