{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4450-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4450-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4450-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4450-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4450-8, 4-pole miniature circuit breaker, D tripping characteristic, 50 A rated at 400 V AC, 10 kA breaking capacity, 4 MW units.","salesMarkdown":"## Siemens 5SL4450-8 SENTRON 4-Pole MCB, D Curve, 50 A The D curve suits loads with high inrush — motor starters, transformers, or welding equipment — where the magnetic trip holds off until roughly 10–20× rated current. At 30 °C ambient the breaker carries the full 50 A; at 40 °C it derates to 47.36 A, at 45 °C to 46 A, and at 55 °C to 43.09 A. Degree of pollution 2, overvoltage category III.","metaTitle":"Siemens 5SL4450-8 SENTRON MCB, 4P, D Curve, 50 A, 10 kA","metaDescription":"Siemens 5SL4450-8 SENTRON miniature circuit breaker, 4-pole, D tripping characteristic, 50 A rated at 400 V AC, 10 kA breaking capacity per EN 60898/IEC 60947-2. Active production,","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SL4450-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 4-pole, D, 50 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"50 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":"50 A","at 40 °C rated value":"47.36 A","at 45 °C rated value":"46 A","at 55 °C rated value":"43.09 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":"4","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 (Switching 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":"3.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e4ce028f297f28a50bf4f36140584312.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=117499&mlfb=5SL4450-8"},"ai":{"faq":[{"question":"Who supplies 5SL4450-8 and how is it quoted for volume purchases?","answer":"The 5SL4450-8 is supplied through independent distribution channels. Volume purchases are quoted to order against an RFQ; availability and current pricing are confirmed at quote time."},{"question":"What is 5SL4450-8's listed depth (76 mm) on this component line?","answer":"The overall depth is 76 mm, with an installation depth of 70 mm. The width is 72 mm (4 modular width units), height 90 mm."},{"question":"Will 5SL4450-8 drop into a panel that was specified around 5SL4363-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint (4 MW units), so mechanical fit is identical. The key difference is the tripping characteristic: 5SL4450-8 is D curve (high inrush), while 5SL4363-7 is a different curve — verify the load's inrush profile before swapping."},{"question":"What compliance documentation does this brand provide for 5SL4450-8 (RoHS, REACH, UL, IEC)?","answer":"The 5SL4450-8 carries a 10 kA breaking capacity per both EN 60898 and IEC 60947-2. It is halogen-free and silicon-free, supporting RoHS/REACH compliance. UL certification is typical for the SENTRON series; confirm the specific UL file number with the supplier at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4450-8","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/5SL4450-8 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}}