{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4540-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4540-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4540-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4540-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4540-8 miniature circuit breaker, D tripping characteristic, 2-pole (1P+N), 10 kA (IEC 60898-1) / 15 kA (IEC 60947-2), 230 V AC, 60 V DC, 2 MW units, IP20.","salesMarkdown":"Breaking capacity is 10 kA per IEC 60898-1 and 15 kA per IEC 60947-2, with an additional 15 kA at DC per IEC 60947-2. For UL 1077 / CSA C22.2 No.235 installations, the interrupting rating is 5 kA. That spread covers most industrial distribution panels; the 15 kA IEC figure gives headroom for higher-fault locations without cascading upstream. Rated operational voltage is 230 V AC (single-phase, 250 V max) and 60 V DC (72 V max). The neutral conductor is switched (1P+N), which is standard for final subcircuits where both line and neutral need isolation. Designed and certified to IEC / EN 60898-1 and IEC / EN 60947-2, plus UL 1077 for North American acceptance. Halogen-free and silicon-free construction, important for sensitive environments (semiconductor fabs, medical device assembly) where outgassing can contaminate optics or contacts. Ambient temperature range is -40 °C to +75 °C, with humidity limits of 95% at 55 °C, derating to 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz — adequate for machine-mounted panels near rotating equipment. ## Physical integration and wiring Dimensions: 76 mm depth, 36 mm width (2 MW), 90 mm height. Installation depth is 70 mm. Combined terminal at top and bottom.","metaTitle":"Siemens SENTRON 5SY4540-8 MCB, D Curve, 2-Pole, 10 kA IEC","metaDescription":"Siemens SENTRON 5SY4540-8 miniature circuit breaker, D tripping characteristic, 2-pole (1P+N), 10 kA per IEC 60898-1, 15 kA per IEC 60947-2. 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":"5SY4540-8","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, D, 40A, 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":"D","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"15 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":"3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a44123930c72de5d65e896b10d88ceeb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=13218&mlfb=5SY4540-8"},"ai":{"faq":[{"question":"What compliance documentation does this brand provide for 5SY4540-8?","answer":"The MCB is certified to IEC / EN 60898-1, IEC / EN 60947-2, UL 1077, and CSA C22.2 No.235. It is halogen-free and silicon-free. Standard documentation includes the declaration of conformity and test certificates per those standards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4540-8","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/5SY4540-8 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}}