{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6650-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6650-6","canonicalUrl":"https://aoctrl.com/siemens/5SY6650-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6650-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6650-6, 4-pole (3P+N) miniature circuit breaker, 50 A rated, B tripping characteristic, 6 kA per EN 60898 / 10 kA per IEC 60947-2, 4 MW wide, IP20.","salesMarkdown":"## What this 50 A B-curve MCB means for your panel The Siemens 5SY6650-6 is a 4-pole (3P+N) SENTRON miniature circuit breaker rated 50 A at 35 °C with a B tripping characteristic — meaning it trips at 3 to 5 times rated current, which makes it a solid choice for resistive and general-purpose loads where you want fast clearing on short circuits but don't need the inrush headroom of a C curve. Out here in the grease, if you're feeding a control transformer or a bank of contactors, the B curve keeps nuisance trips off the floor. At 50 A, this is a main feeder MCB for a sub-panel, not a branch device. It's rated for 50/60 Hz supply and carries an overvoltage category III rating, so it's suited for fixed-installation panels — not plug-in equipment. ## Panel fit and environmental tolerance Installation depth is 70 mm, and the overall depth is 76 mm, so plan for that behind the gland plate. But the temperature range is wide: -40 °C to 75 °C ambient, so it'll handle a hot summer in an unventilated enclosure or a cold storage facility. Degree of pollution 3 means it's designed for conductive pollution environments — think factory floor with some dust and humidity, not a clean room. ## Temperature derating and real-world current The 50 A rating holds at 35 °C. At 45 °C it derates to 47 A; at 50 °C it's 45.95 A; at 55 °C it's 44.9 A. The B curve still trips at 3-5x the derated current. Humidity tolerance is 95% up to 55 °C, dropping to 35% at 75 °C — that's typical for a sealed MCB, but worth noting if your panel sees condensation cycles.","metaTitle":"Siemens 5SY6650-6 SENTRON MCB, 50 A, 4P, B-Curve","metaDescription":"Siemens 5SY6650-6 SENTRON miniature circuit breaker, 50 A rated, 4-pole (3P+N), B characteristic, 6 kA (EN 60898) / 10 kA (IEC 60947-2). Active production. Quoted 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":"5SY6650-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 3+N-pole B, 50 A, D=70 mm","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":"50 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P+N","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","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":"6 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"10 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":"Yes","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 (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/efceebbe54a55c776955fe7c3b92e856.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=290880&mlfb=5SY6650-6"},"ai":{"faq":[{"question":"How many poles does this MCB have and what is the wiring configuration?","answer":"It is a 4-pole device wired as 3P+N — three phase poles plus a switched neutral. The neutral pole is not internally protected; it switches with the phases."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6650-6","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/5SY6650-6 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}}