{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4463-8FA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4463-8FA","canonicalUrl":"https://aoctrl.com/siemens/5SY4463-8FA","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4463-8FA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4463-8FA, 4-pole miniature circuit breaker, 63 A, D characteristic, 10 kA interrupting capacity per EN 60898, 400 V AC, 4 MW.","salesMarkdown":"The Siemens 5SY4463-8FA is a 4-pole miniature circuit breaker from the SENTRON family, rated 63 A with a D tripping characteristic and a 10 kA interrupting capacity per EN 60898 at 400 V AC. It's designed as a counter-preliminary MCB for metering applications — the 'as automatic meter' designation means it's built for utility-metering cabinets where the breaker sits ahead of the meter, not for general distribution board duty. The D curve (10–20× In magnetic trip) handles high inrush loads like transformers or motor starters without nuisance tripping, which is the main reason you'd spec this over a B or C curve in an industrial panel. If your upstream protective device limits let-through energy below 10 kA, this breaker coordinates cleanly. The D characteristic means the magnetic trip fires at 10 to 20 times rated current (630 to 1260 A for this 63 A unit), so it's sized for circuits with brief high-starting currents like small transformers, DC power supplies, or motor contactor coils. At 400 V AC, the rated voltage covers 3-phase line-to-line; the 440 V multi/single-phase rating gives headroom for lightly loaded transformers or genset output. The 72 V DC maximum means it can switch a DC control bus, but don't expect full 10 kA interrupting at DC — that's a separate rating not listed here. The 4-module-width footprint (72 mm) occupies four 18 mm slots on the rail. Sealable with a lead seal or adhesive label for metering applications where tamper evidence is required.","metaTitle":"Siemens 5SY4463-8FA SENTRON MCB, 4P, 63 A, D Curve, 10 kA","metaDescription":"Siemens 5SY4463-8FA SENTRON miniature circuit breaker, 4-pole, 63 A, D tripping characteristic, 10 kA per EN 60898, 400 V AC. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","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","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","Design Of The Product":"As automatic meter","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 EN 60898 rated value":"10 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","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","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","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":"https://cdn.aoctrl.com/2b371b7ff86e64ec6d5b925f86c53fd5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=158380&mlfb=5SY4463-8FA","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4463-8FA/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SY4463-8FA used for?","answer":"It's a 4-pole miniature circuit breaker with D characteristic, rated 63 A and 10 kA at 400 V AC. It's designed as a counter-preliminary MCB for utility metering cabinets, and is also suitable for general industrial distribution where high inrush loads (transformers, motors) require a D-curve trip."},{"question":"Where can I buy the 5SY4463-8FA and how is it quoted?","answer":"We source this part through independent distribution channels. Availability and current pricing are confirmed at quote time against an RFQ — no stock count or price is published here. Submit an RFQ for a firm quote with lead time."},{"question":"What compliance documentation does the 5SY4463-8FA carry?","answer":"The breaker is rated per EN 60898 for breaking capacity, and carries vibration resistance per IEC 60068-2-6. It is halogen-free and silicon-free. For specific RoHS/REACH/UL declarations, the manufacturer's documentation should be consulted — the evidence does not list a UL file number or CE mark explicitly, but the EN 60898 rating implies CE conformity for the European market."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4463-8FA","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/5SY4463-8FA 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}}