{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6450-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6450-6","canonicalUrl":"https://aoctrl.com/siemens/5SY6450-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6450-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6450-6, 4-pole miniature circuit breaker, 50 A rated, B tripping characteristic, 6 kA (EN 60898) / 10 kA (IEC 60947-2) breaking capacity, 72 mm wide.","salesMarkdown":"## Siemens SENTRON 5SY6450-6 — 50 A, 4-pole, B-curve MCB It carries a 6 kA breaking capacity per EN 60898-1 and a 10 kA rating per IEC 60947-2 / UL 1077, so it handles fault currents up to those levels without upstream coordination issues. ## Derating and ambient conditions Rated current holds at 50 A up to 35 °C, then steps down: 48 A at 40 °C, 47 A at 45 °C, 45.95 A at 50 °C, and 44.9 A at 55 °C. Humidity limits are 95% up to 55 °C, dropping to 35% at 75 °C; that's fine for most indoor industrial enclosures but not for direct washdown zones. Mounts in any position — no orientation restrictions for vertical or horizontal DIN-rail layouts. The quick-assembly fastening method clips onto the rail without tools.","metaTitle":"Siemens 5SY6450-6 SENTRON MCB, 4P, 50A, B-Curve, 6kA/10kA","metaDescription":"Siemens SENTRON 5SY6450-6 4-pole MCB, 50 A rated, B-curve. Breaking capacity 6 kA per EN 60898 / 10 kA per IEC 60947-2. Active production. Quoted to order against RFQ.","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":"5SY6450-6","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, B, 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","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"50 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","according to EN 61346-2":"F","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","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"4","Tripping Characteristic Class":"B","Position / Of Power Supply Cord":"Any","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","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","at DC / according to IEC 60947-2 / rated value":"15 kA","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","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/eabd1ef01630b08aa333678fe031ace0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=115860&mlfb=5SY6450-6"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY6450-6?","answer":"Submit an RFQ through the storefront. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is 5SY6450-6's listed depth and width?","answer":"Depth is 76 mm, width is 72 mm (4 modular units), height is 90 mm. Installation depth is 70 mm."},{"question":"Will 5SY6450-6 drop into a panel specified around 5SY4140-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint (4 MW = 72 mm wide), so the mechanical fit is identical. The difference is rating: 5SY6450-6 is 50 A B-curve; 5SY4140-7 is 40 A C-curve. If the circuit is sized for 40 A C-curve, dropping in a 50 A B-curve changes both the overload threshold and the magnetic trip point — verify the load and cable sizing before swapping."},{"question":"What compliance documentation does 5SY6450-6 carry?","answer":"It is rated under IEC / EN 60898-1 and IEC / EN 60947-2 / UL 1077. Halogen-free and silicon-free. Overvoltage category III, pollution degree 3. The product is sealable for tamper-proof installations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6450-6","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/5SY6450-6 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}}