{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8150-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8150-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8150-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8150-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8150-8, 1-pole miniature circuit breaker, D tripping characteristic, 50 A rated current, 20 kA breaking capacity per IEC 60947-2, 440 V AC.","salesMarkdown":"## What this breaker does in a panel It breaks up to 20 kA under IEC 60947-2 at 440 V AC, and 15 kA at 72 V DC, so it handles substantial fault energy on industrial distribution. The 18 mm width (one modular unit) snaps onto DIN rail and leaves room for other gear in the enclosure. ## Sizing and derating for real panels At 45 °C the breaker holds its full 50 A rating. At 50 °C it derates to 48.75 A; at 55 °C, 47.45 A. That's a shallow derating curve — you don't lose much headroom in a warm cabinet. The 76 mm depth plus 70 mm installation depth means it fits standard distribution boards without sticking past the gland plate. Mount it in any position; the quick-assembly system clips onto the rail without tools. Terminal design is combined top and bottom, with touch protection built in. ## Environmental and compliance fit IP20 with connected conductors. The 5SY8150-8 is designed for mechanical engineering and industry applications per Siemens suitability designation.","metaTitle":"Siemens 5SY8150-8 SENTRON MCB, 1P D 50 A, 20 kA IEC","metaDescription":"Siemens 5SY8150-8 SENTRON miniature circuit breaker, 1-pole, D-curve, 50 A, 20 kA breaking capacity per IEC 60947-2. 18 mm wide, 76 mm deep. Active production. Sourced to order aga","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","at AC / rated value":"50 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","according to 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","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","according to IEC 60947-2 / rated value":"20 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","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","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=370153&mlfb=5SY8150-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8150-8/alternatives.json"},"ai":{"faq":[{"question":"What is 5SY8150-8's listed depth (76 mm) on this component line?","answer":"The 5SY8150-8 has a depth of 76 mm and an installation depth of 70 mm, fitting standard distribution boards without protruding past the gland plate."},{"question":"What is 5SY8150-8's listed width (18 mm) on this component line?","answer":"The 5SY8150-8 is 18 mm wide — one modular unit — and snaps onto DIN rail, leaving room for adjacent breakers or other gear."},{"question":"Will 5SY8150-8 drop into a panel that was specified around 5SY7210-7CC without rewiring?","answer":"Both are 1-pole SENTRON MCBs on an 18 mm footprint with the same DIN-rail fastening method, so the 5SY8150-8 will physically fit the same rail position. However, the 5SY8150-8 is a D-curve 50 A device, while the 5SY7210-7CC is a different rating and characteristic — verify the circuit's required breaking capacity and trip curve before swapping without rewiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8150-8","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/5SY8150-8 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}}