{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8463-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8463-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8463-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8463-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8463-8, 4-pole miniature circuit breaker, D tripping characteristic, 20 kA at 400 V AC (IEC 60947-2), 5 kA UL 1077, 4 MW, IP20, halogen-free, silicon-free.","salesMarkdown":"It carries a 20 kA breaking capacity at 400 V AC per IEC 60947-2 and 5 kA per UL 1077, with a DC rating of 15 kA at 60 V. Rated operating voltage is 400 V AC (440 V max multi-phase or single-phase), and DC rated voltage is 60 V (72 V max). ## D-curve and breaking capacity — the so-what The D characteristic means the breaker trips at 10–20× rated current, which suits loads with high starting surges — motor starters, welding equipment, or transformer primaries — without nuisance trips. At DC, the 15 kA rating at 60 V covers common industrial DC bus applications. The 5 kA UL 1077 rating makes it acceptable for UL-listed panels in North American installations. Snaps onto DIN rail via a quick-assembly system, any mounting position. Depth is 76 mm (70 mm installation depth). Combined terminals on top and bottom simplify wiring. Sealable, halogen-free, silicon-free — meets clean-room and low-smoke requirements. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.","metaTitle":"Siemens SENTRON 5SY8463-8 MCB, 4P D-curve, 20 kA IEC","metaDescription":"Siemens SENTRON 5SY8463-8 miniature circuit breaker, 4-pole D-curve, 20 kA at 400 V AC per IEC 60947-2, 5 kA UL 1077. Current production. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 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":"No","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"D","according to IEC 60947-2 rated value":"20 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 multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 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":"5 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=500409&mlfb=5SY8463-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8463-8/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 5SY8463-8?","answer":"It is a 4-pole D-curve MCB rated 20 kA at 400 V AC (IEC 60947-2), 15 kA at 60 V DC, and 5 kA UL 1077. Operating temperature range is -40 to 75 °C."},{"question":"How do I get pricing and availability for the 5SY8463-8?","answer":"Submit an RFQ — the part is sourced to order through independent distribution, and current pricing and stock levels are confirmed at quote time."},{"question":"Will the 5SY8463-8 drop into a panel specified for the 5SY4140-7?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY8463-8 uses a D curve while the 5SY4140-7 is a B curve. The D curve allows higher inrush before tripping — verify coordination with the load type before substituting."},{"question":"What compliance documentation is available for the 5SY8463-8?","answer":"It is certified to IEC 60947-2 and UL 1077, halogen-free and silicon-free. RoHS and REACH declarations are typically provided by the manufacturer; request them with the order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8463-8","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/5SY8463-8 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}}