{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4363-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4363-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4363-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4363-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4363-8, 3-pole miniature circuit breaker, 63 A, D tripping characteristic, 10 kA breaking capacity, 400 V AC, IP20.","salesMarkdown":"The Siemens 5SL4363-8 is a SENTRON miniature circuit breaker — 3-pole, 63 A rated at 400 V AC, with a D tripping curve and 10 kA breaking capacity per both EN 60898 and IEC 60947-2. That D curve means it's built for high inrush loads: motor starters, transformers, discharge lighting. The 10 kA SCCR at 400 V tells you it can clear a fault up to that level without upstream devices needing to trip — a real consideration in panel coordination studies. ## What the ratings mean for fit The 63 A rating is at 30 °C ambient. At 40 °C it derates to 60.45 A; at 45 °C to 57.96 A; at 55 °C to 56.41 A. If your panel runs hot — and most do — size the load side accordingly. The D characteristic (10–20× In magnetic trip) handles motor starting without nuisance trips, but it also means the breaker won't clear a low-level overload as fast as a B or C curve would. That's by design: you trade selectivity for inrush tolerance. Power loss is 5 W per pole at rated current in hot operating state. ## Mounting and integration Snaps onto DIN rail in any mounting position. Occupies 3 modular width units (54 mm total width). Depth is 76 mm; installation depth 70 mm. IP20 with connected conductors — fine inside a panel, not for wet or dusty locations. Sealable, halogen-free, silicon-free. Overvoltage category III, pollution degree 2.","metaTitle":"Siemens 5SL4363-8 SENTRON MCB, 3P, 63 A, D Curve, 10 kA","metaDescription":"Siemens 5SL4363-8 SENTRON miniature circuit breaker, 3-pole, 63 A, D tripping characteristic, 10 kA breaking capacity per EN 60898 / IEC 60947-2. IP20, -40 to 75 °C. Available to o","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":"5SL4363-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3-pole, D, 63 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"63 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","at 30 °C rated value":"63 A","at 40 °C rated value":"60.45 A","at 45 °C rated value":"57.96 A","at 55 °C rated value":"56.41 A","Energy Limitation Class":"3","according to EN 61346-2":"F","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"3","Tripping Characteristic Class":"D","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"10 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ecda876b63d8adc95415fb3dec67057b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=86834&mlfb=5SL4363-8"},"ai":{"faq":[{"question":"Will 5SL4363-8 drop into a panel specified around 5SL4363-7?","answer":"Both are 3-pole, 63 A, D-curve breakers in the same SENTRON family with identical dimensions (54 mm wide, 76 mm deep). The 5SL4363-8 should drop in without rewiring, but verify the terminal arrangement against your panel layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4363-8","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/5SL4363-8 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}}