{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7450-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7450-6","canonicalUrl":"https://aoctrl.com/siemens/5SY7450-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7450-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7450-6 miniature circuit breaker, 4-pole, B characteristic, 50 A at 35 °C, 400 V AC, 15 kA per EN 60898, 20 kA per IEC 60947-2.","salesMarkdown":"The 15 kA breaking capacity per EN 60898 covers most commercial and light industrial panels; the 20 kA rating per IEC 60947-2 gives headroom for higher-fault installations where the prospective short-circuit current exceeds 15 kA. The 400 V AC rating (50/60 Hz) suits three-phase distribution in 400/230 V networks across Europe and other 50/60 Hz regions. ## Thermal derating and ambient conditions The 50 A rating holds at 35 °C. At 45 °C it derates to 47 A, at 50 °C to 45.95 A, at 55 °C to 44.9 A, and at 60 °C to 43.8 A. The operating range spans -40 °C to 75 °C, with humidity limits of 95 % up to 55 °C, 55 % up to 70 °C, and 35 % up to 75 °C. The 5SY7450-6 snaps onto a DIN rail via the quick-assembly system — 4 modular width units (72 mm wide, 90 mm tall, 76 mm deep, 70 mm installation depth). Mounting position is any. Sealable — can be locked in the OFF position for lockout/tagout.","metaTitle":"Siemens 5SY7450-6 SENTRON MCB, 4P, B Curve, 50 A, 400 V","metaDescription":"Siemens 5SY7450-6 SENTRON miniature circuit breaker, 4-pole, B curve, 50 A rated at 35 °C, 400 V AC, 15 kA (EN 60898) / 20 kA (IEC 60947-2). Current production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","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","acc. to IEC 81346-2":"F","at AC / rated value":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","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 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":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"20 kA","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","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 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":"72 V","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=272499&mlfb=5SY7450-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7450-6/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY7450-6 and how do I get a price?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7450-6","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/5SY7450-6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}