{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4363-8FA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4363-8FA","canonicalUrl":"https://aoctrl.com/siemens/5SY4363-8FA","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4363-8FA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4363-8FA, miniature circuit breaker, 3-pole, 63 A, D characteristic, 10 kA per EN 60898, 440 V AC, 3 modular width units.","salesMarkdown":"The D curve holds through motor inrush (typically 10–20× rated current for a few cycles) so you don't nuisance-trip on a compressor or conveyor start. Rated 63 A at 35 °C, it derates to 59.98 A at 40 °C and 56.83 A at 50 °C — so if your panel ambient runs 45 °C, plan for 58.4 A continuous load. The 3-pole design (3P) switches all three phases together; no neutral pole built in, so it's for a 3-wire delta or a 4-wire wye where the neutral is separately protected.","metaTitle":"Siemens 5SY4363-8FA SENTRON MCB, 63 A, D Curve, 10 kA, 3-Pol","metaDescription":"Siemens SENTRON 5SY4363-8FA miniature circuit breaker, 63 A, D tripping characteristic, 10 kA breaking capacity per EN 60898, 3-pole, 440 V AC. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY4363-8FA","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3-pole, 63 A, D=70 mm as counter preliminary miniature circuit breaker","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"63 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"As automatic meter","at 35 °C / rated value":"63 A","at 40 °C / rated value":"59.98 A","at 45 °C / rated value":"58.4 A","at 50 °C / rated value":"56.83 A","at 55 °C / rated value":"55.12 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"3","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","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","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ab6d3d74d2fa84ffc4f71fd7a54d5ab3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=109166&mlfb=5SY4363-8FA"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4363-8FA?","answer":"It is rated 10 kA per EN 60898, meaning it can safely interrupt fault currents up to 10,000 A at the rated voltage."},{"question":"What does the D tripping characteristic mean for this MCB?","answer":"The D curve allows short-circuit trips at 10–20× rated current (630–1260 A for this 63 A breaker), so it avoids nuisance tripping on motor inrush or transformer energization. It is the standard choice for motor circuits and high-inrush loads."},{"question":"Where can I buy 5SY4363-8FA?","answer":"The 5SY4363-8FA is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4363-8FA","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/5SY4363-8FA 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}}