{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8363-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8363-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8363-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8363-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, miniature circuit breaker, 5SY8363-8, 3-pole, D tripping characteristic, 20 kA at 400 V AC per IEC 60947-2, 5 kA per UL 1077, 3 MW units wide.","salesMarkdown":"The D curve means magnetic trip is set at 10–20× rated current, so it avoids nuisance tripping on transformer inrush or motor start-up — standard choice for motor branch circuits and inductive loads. Combined top and bottom terminals simplify daisy-chaining busbars. ## Environmental and compliance profile Halogen-free and silicon-free construction; complies with IEC 60947-2 and UL 1077, with a UL 1077 / CSA C22.2 No. 235 interrupting rating of 5 kA. ## Vibration and mechanical endurance Vibration tested per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz — suitable for installation on machinery with moderate vibration, like conveyor drives or compressor skids. Mechanical life of 10 000 operating cycles typical — not a frequent-switching device, but adequate for its role as a backup overcurrent protector behind a contactor.","metaTitle":"Siemens 5SY8363-8 SENTRON MCB, 3P, D-curve, 20 kA IEC","metaDescription":"Siemens 5SY8363-8 SENTRON miniature circuit breaker, 3-pole, D tripping characteristic, 20 kA breaking capacity per IEC 60947-2. UL 1077 listed. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY8363-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 3P, D63","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","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":"3","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6ddfe1a7c846c7a94ed14ce13cfc0628.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=38155&mlfb=5SY8363-8"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY8363-8?","answer":"20 kA at 400 V AC per IEC 60947-2, 15 kA at 60 V DC per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"Will 5SY8363-8 drop into a panel designed for 5SY4140-7?","answer":"Both are 3-pole SENTRON MCBs with the same 3-MW DIN-rail footprint, so physical fit is identical. The key difference is the tripping curve — 5SY8363-8 is D-curve (motor/inductive loads), while 5SY4140-7 is B-curve (general-purpose/lighting). Verify the curve matches your branch circuit before swapping."},{"question":"What compliance documentation does Siemens provide for 5SY8363-8?","answer":"The MCB is certified to IEC 60947-2 and UL 1077 / CSA C22.2 No. 235. It is halogen-free and silicon-free, supporting RoHS/REACH compliance requirements."},{"question":"Where can I buy 5SY8363-8 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no minimum order quantity for standard requests."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8363-8","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/5SY8363-8 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}}