{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6450-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6450-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6450-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6450-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6450-7, 4-pole miniature circuit breaker, C-curve, 50 A rated, 6 kA per EN 60898 / 10 kA per IEC 60947-2, 50/60 Hz, IP20, halogen-free, current production.","salesMarkdown":"The breaker is certified to IEC / EN 60898-1 (6 kA) and IEC / EN 60947-2 (10 kA), plus UL1077 — so it meets both residential and industrial coordination requirements. The 50 A rating holds at 35 °C ambient; at 40 °C it derates to 48 A, at 45 °C to 47 A, at 50 °C to 45.95 A, and at 55 °C to 44.9 A. That means a panel running at 50 °C loses about 8 % of the nominal current — factor that into your load schedule if the breaker shares a crowded enclosure. ## Breaking capacity and DC rating For DC circuits the breaker is rated 15 kA per IEC 60947-2, which covers many battery-backed or rectifier-fed loads. Depth is 76 mm (installation depth 70 mm), height 90 mm, width 72 mm (4 MW). The breaker is sealable, halogen-free and silicon-free — important for clean-room or food-bev zones where outgassing contaminants can’t be tolerated.","metaTitle":"Siemens 5SY6450-7 SENTRON MCB, 4P, C-curve, 50 A, 6/10 kA","metaDescription":"Siemens 5SY6450-7 SENTRON miniature circuit breaker, 4-pole, C-curve, 50 A rated, 6 kA (EN 60898) / 10 kA (IEC 60947-2) breaking capacity, 50/60 Hz, IP20, halogen-free, current pro","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":"5SY6450-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 6kA, 4-pole, C, 50 A, D=70 mm","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":"50 A","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","at 35 °C rated value":"50 A","at 40 °C rated value":"48 A","at 45 °C rated value":"47 A","at 50 °C rated value":"45.95 A","at 55 °C rated value":"44.9 A","Energy Limitation Class":"3","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":"C","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 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","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":"3.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e8b166da7510eaf01e7b99f05e733b5f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=98940&mlfb=5SY6450-7"},"ai":{"faq":[{"question":"Where can I buy 5SY6450-7 and how do I get a price?","answer":"The 5SY6450-7 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the breaking capacity of 5SY6450-7?","answer":"The 5SY6450-7 has a breaking capacity of 6 kA per EN 60898-1 and 10 kA per IEC 60947-2; for DC circuits it is rated 15 kA per IEC 60947-2."},{"question":"What compliance documentation does 5SY6450-7 carry?","answer":"The 5SY6450-7 is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL1077. It is halogen-free and silicon-free."},{"question":"Will 5SY6450-7 drop into a panel specified around 5SY4140-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs with the same 72 mm width (4 MW) and DIN-rail mounting, so the physical fit is identical. The 5SY6450-7 is a 50 A C-curve; the 5SY4140-7 is a 40 A C-curve. If the panel was wired for 40 A, the 50 A breaker will fit mechanically but the circuit protection rating changes — verify the cable and load ratings before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6450-7","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/5SY6450-7 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}}