{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8150-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8150-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8150-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8150-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8150-7, 1-pole miniature circuit breaker, 50 A rated current, C characteristic, 25 kA breaking capacity at 440 V AC per IEC 60947-2, 18 mm width.","salesMarkdown":"## Siemens 5SY8150-7 SENTRON MCB — 50 A C-Curve, 25 kA Breaking Capacity The UL 1077 / CSA C22.2 No. 235 rating drops to 5 kA, so if the panel carries a UL label, verify the available fault current at the point of installation stays within that limit. The quick-assembly fastening system means it clips in and out without tools — useful when you're populating a multi-row panel and need to swap a failed unit without disturbing adjacent wiring. ## Thermal Derating and Environmental Fit Rated 50 A at 45 °C ambient, the 5SY8150-7 derates to 48.75 A at 50 °C and 47.45 A at 55 °C. The breaker is rated for ambient operation from -40 °C to 75 °C, with humidity influence capped at 95% up to 55 °C, then dropping to 35% at 75 °C. That's a wide environmental envelope; it handles outdoor shelters and unheated warehouses without condensation issues. ## Fault Current Ratings Across Standards Three breaking capacity ratings cover the common certification paths: 25 kA at 440 V AC per IEC 60947-2 (the main industrial standard), 15 kA at DC per the same standard, and 5 kA per UL 1077 / CSA C22.2 No. 235. The DC rating matters for control circuits or battery-backed distribution where the fault profile differs from AC.","metaTitle":"Siemens 5SY8150-7 SENTRON MCB, 50 A C-Curve, 25 kA","metaDescription":"Siemens 5SY8150-7 SENTRON miniature circuit breaker, 50 A rated current, C tripping characteristic, 25 kA breaking capacity at 440 V AC per IEC 60947-2. Current production. Quoted","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","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","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"50 A","at 50 °C / rated value":"48.75 A","at 55 °C / rated value":"47.45 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"25 kA","Product Feature / Touch Protection":"Yes","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","Type Of Voltage / Of The Operating Voltage":"AC","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 Component / 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":"https://cdn.aoctrl.com/45a65edc58ad608a7b5e35f54ac6c9c0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=242075&mlfb=5SY8150-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8150-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY8150-7?","answer":"25 kA at 440 V AC per IEC 60947-2, 15 kA at DC per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"What is the width and depth of 5SY8150-7?","answer":"18 mm width (1 modular unit) and 76 mm depth. It snaps onto a standard DIN rail with a quick-assembly fastening system."},{"question":"Where can I buy 5SY8150-7 and get current pricing?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and delivery window."},{"question":"What compliance documentation does Siemens provide for 5SY8150-7?","answer":"The breaker carries IEC 60947-2, UL 1077, and CSA C22.2 No. 235 certifications. It is halogen-free and silicon-free. Standard Siemens declarations for RoHS and REACH are available with the product documentation."},{"question":"Will 5SY8150-7 drop into a panel specified around 5SY4116-7CV?","answer":"Both are 1-pole SENTRON MCBs on the same 18 mm footprint with identical DIN-rail mounting, so mechanical fit is the same. The difference is electrical: the 5SY8150-7 is a 50 A C-curve, while the 5SY4116-7CV is a lower-current variant. Verify the load current and coordination study before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8150-7","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/5SY8150-7 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}}