{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8516-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8516-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8516-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8516-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8516-8 miniature circuit breaker, 2-pole (1P+N), D-characteristic, 16 A, 30 kA IEC 60947-2, 36 mm wide, current production.","salesMarkdown":"## What this MCB does on the rail The Siemens 5SY8516-8 is a 2-pole (1P+N) SENTRON miniature circuit breaker with a D tripping characteristic, rated 16 A at 50/60 Hz. The D-curve means it tolerates high inrush currents — think motor starts, transformer energization, or welding equipment — without nuisance tripping, while still clearing a hard fault. Breaking capacity sits at 30 kA per IEC 60947-2, so it handles substantial fault currents in an industrial panel without needing an upstream current-limiting device. At 36 mm wide (2 modular units), it snaps onto a standard DIN rail in any mounting position. Depth is 76 mm, installation depth 70 mm — factor that into gland-plate clearance if you're packing a shallow enclosure. Rated for overvoltage category III, pollution degree 3, so it's comfortable in a typical control cabinet environment, not just a clean residential load center. ## Temperature derating — the real-world numbers The 16 A rating holds at 45 °C. At 50 °C it drops to 15.5 A, and at 55 °C it's 14.99 A. If your panel runs hot — say, a packed cabinet with drives below — use the 55 °C figure for sizing. Ambient range is -40 °C to 75 °C, so cold-storage lines or outdoor cabinets are fine. ## DC and UL ratings — not just an IEC part DC breaking capacity per IEC 60947-2 is 15 kA, which matters if you're protecting DC bus feeds or battery circuits. Under UL 1077 and CSA C22.2 No. 235 it's rated 5 kA — useful for North American supplementary protection applications. That dual rating saves you from stocking a separate UL-listed breaker for export panels.","metaTitle":"Siemens 5SY8516-8 SENTRON MCB, 2-pole D-curve 16 A, 30 kA","metaDescription":"Siemens 5SY8516-8 SENTRON miniature circuit breaker, 2-pole 1P+N, D-curve, 16 A rated, 30 kA IEC breaking capacity. Current production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","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":"16 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"16 A","at 50 °C / rated value":"15.5 A","at 55 °C / rated value":"14.99 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"30 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","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"250 V","Mechanical Service Life (Operating 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=46664&mlfb=5SY8516-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8516-8/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY8516-8?","answer":"30 kA per IEC 60947-2 at AC, 15 kA per IEC 60947-2 at DC, and 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"Where can I buy 5SY8516-8 and how is it quoted?","answer":"Sourced to order through independent industrial-automation distribution. Submit an RFQ for current pricing and availability; lead time and stock are confirmed at quote time."},{"question":"Will 5SY8516-8 drop into a panel specified around 5SY7206-7CC?","answer":"Both are 2-module-wide (36 mm) SENTRON MCBs on the same DIN-rail footprint, so mechanical fit is identical. The functional difference is the tripping characteristic — 5SY8516-8 is D-curve (high-inrush loads) while 5SY7206-7CC uses a different curve. Verify the branch circuit's inrush profile before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8516-8","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/5SY8516-8 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}}