{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5450-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5450-7","canonicalUrl":"https://aoctrl.com/siemens/5SY5450-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5450-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5450-7, 4-pole miniature circuit breaker, 50 A rated, C-curve trip characteristic, 10 kA breaking capacity per EN 60898, universal current AC/DC.","salesMarkdown":"## Rated current and trip curve — what drives the fit At 40 °C the rating derates to 48 A; at 50 °C it drops to 45.95 A, and at 60 °C to 43.8 A. ## Breaking capacity and voltage — AC and DC sides Breaking capacity is 10 kA per EN 60898 on the AC side, and 10 kA per EN 60898-2 on the DC side at 880 V. That 880 V DC rating is the standout — most 4-pole MCBs in this frame top out at 440 V DC. The 5SY5450-7 handles both poles in series for the DC path, so it's a candidate for 880 V battery banks or DC bus protection where you'd otherwise need two breakers in series. The voltage type is AC/DC universal current; on DC supply, observe polarity as marked. The quick assembly system snaps onto the rail without tools. IP20 with connected conductors, pollution degree 2, overvoltage category II. Sealable, halogen-free, silicon-free.","metaTitle":"Siemens 5SY5450-7 SENTRON MCB, 4P, 50 A, C-Curve, 10 kA","metaDescription":"Siemens 5SY5450-7 SENTRON miniature circuit breaker, 4-pole, 50 A rated, C-curve, 10 kA breaking capacity per EN 60898. Universal current AC/DC. Active production, sourced to order","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":"5SY5450-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker Universal current 880 V DC 400 V AC 10kA, 4-pole, C, 50 A max. 1000 V DC","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC/DC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"50 A","at DC / rated value":"880 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"II","Combined Terminal Top":"Yes","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","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","at 60 °C / rated value":"43.8 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"universal current","at DC / acc. to EN 60898-2":"10 kA","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"AC as required, observe DC polarity","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"1 000 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"5 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8bca9a8d0c67dcf90b56c4684657b9b5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=290786&mlfb=5SY5450-7"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY5450-7?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels."},{"question":"Will 5SY5450-7 drop into a panel that was specified around 5SY5416-7 without rewiring?","answer":"The 5SY5450-7 shares the same 4-module-wide DIN-rail footprint as the 5SY5416-7 — same 72 mm width, same 70 mm installation depth. The difference is the current rating: 50 A versus 16 A. If the panel wiring and upstream protection are sized for 50 A, it's a direct mechanical swap. If the existing circuit is only rated for 16 A, the breaker will physically fit but the conductors and bus bars must be verified for 50 A."},{"question":"What compliance documentation does Siemens provide for 5SY5450-7?","answer":"The breaker carries EN 60898 and EN 60898-2 ratings for breaking capacity. It is halogen-free and silicon-free. For specific declarations (RoHS, REACH, UL listing per variant), the manufacturer's documentation is available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5450-7","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/5SY5450-7 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}}