{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7514-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7514-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7514-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7514-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7514-8 miniature circuit breaker, D tripping characteristic, 0.3 A rated current, 2-pole (1P+N), 15 kA breaking capacity per EN 60898, 50 kA per IEC 60947-2.","salesMarkdown":"The Siemens 5SY7514-8 is a SENTRON miniature circuit breaker with a D tripping characteristic, rated 0.3 A at AC across 50/60 Hz. It is a 2-pole unit configured as 1P+N, meaning it switches the line and protects the neutral but does not switch it. ## Breaking capacity and standard compliance At DC per IEC 60947-2 it holds 15 kA. ## Thermal derating — the number that matters for real loads The 0.3 A rating is at 35 °C ambient. At 45 °C it derates to 0.27 A, at 50 °C to 0.26 A, at 55 °C to 0.25 A, and at 60 °C to 0.24 A. The breaker also carries a humidity derating curve: max 95% RH up to 55 °C, then 55% RH up to 70 °C, then 35% RH up to 75 °C. ## Mechanical fit and panel integration Mounting position is any, so vertical or horizontal DIN-rail orientation works. The quick-assembly fastening system and combined top/bottom terminals simplify busbar and outgoing wiring. Sealable, halogen-free, and silicon-free construction.","metaTitle":"Siemens 5SY7514-8 SENTRON MCB, D Curve, 0.3 A, 2-Pole","metaDescription":"Siemens 5SY7514-8 SENTRON miniature circuit breaker, 0.3 A, D tripping characteristic, 2-pole (1P+N), 15 kA (EN 60898) / 50 kA (IEC 60947-2). 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","title":"5SY7514-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230 V 15kA, 1+N-pole, D, 0.3 A, D=70 mm","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":"0.3 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 35 °C / rated value":"0.3 A","at 45 °C / rated value":"0.27 A","at 50 °C / rated value":"0.26 A","at 55 °C / rated value":"0.25 A","at 60 °C / rated value":"0.24 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"50 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/abca494e197df0b1ec76670195357a25.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=57572&mlfb=5SY7514-8"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7514-8?","answer":"15 kA per EN 60898 and 50 kA per IEC 60947-2 at AC; 15 kA at DC per IEC 60947-2."},{"question":"What does the D tripping characteristic mean for this 0.3 A breaker?","answer":"The D curve trips instantaneously at 10 to 20 times rated current (3 to 6 A), so it handles high inrush from transformers or power supplies without nuisance tripping on startup."},{"question":"Will 5SY7514-8 drop into a panel specified around 5SY5240-7?","answer":"Both are 2-module-wide SENTRON MCBs on the same DIN-rail footprint, so the mechanical fit is identical. The difference is electrical: 5SY7514-8 is a 0.3 A D-curve, while 5SY5240-7 is a different rating and curve — verify the load current and trip characteristic before substituting."},{"question":"How do I get current pricing and availability for 5SY7514-8?","answer":"Submit an RFQ through this listing. The part is sourced to order via independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 5SY7514-8?","answer":"The breaker is halogen-free and silicon-free. It carries ratings per EN 60898 and IEC 60947-2, and is classified per IEC 81346-2 and DIN EN 61346-2 as function F. Standard Siemens declarations of conformity and material compliance (RoHS, REACH) are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7514-8","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/5SY7514-8 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}}