{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7314-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7314-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7314-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7314-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7314-8, miniature circuit breaker, D-curve, 3-pole, 15 kA (EN 60898-1) / 50 kA (IEC 60947-2), 400 V AC, 3 modular width units.","salesMarkdown":"## What this breaker is and where it fits The Siemens 5SY7314-8 is a SENTRON miniature circuit breaker with a D tripping curve, 3 poles, and a dual-rated breaking capacity of 15 kA per IEC/EN 60898-1 and 50 kA per IEC 60947-2. It's designed for panel mounting via the quick assembly system — snaps onto DIN rail, occupies 3 modular width units (54 mm wide), and accepts supply from any position. The D-curve characteristic means it tolerates high inrush currents without nuisance tripping, so it's suited for motor circuits, transformers, and other inductive loads in mechanical engineering and industrial applications. ## Breaking capacity — what the dual rating means This breaker carries two breaking capacity figures because it's certified under two standards. Per IEC/EN 60898-1 (the household and similar installations standard) it's rated 15 kA. Per IEC 60947-2 (the industrial control gear standard) it's rated 50 kA. The 50 kA figure is the one that governs in an industrial panel with high prospective fault current — it tells you the breaker can safely interrupt a fault up to that level without welding its contacts or rupturing. The 15 kA rating under 60898-1 is the lower bound for residential or light commercial distribution boards. For a machine builder or panel OEM, the 50 kA / 60947-2 rating is the number to size against. ## Physical integration notes Dimensions are 90 mm high, 54 mm wide (3 modular units), 76 mm deep, with a 70 mm installation depth. The housing is halogen-free and silicon-free, IP20 rated with connected conductors — standard for a DIN-rail MCB in a closed panel. Mounting position is any orientation. The combined terminal top and bottom accept conductors without special tools. Pollution degree 3 and overvoltage category III cover the typical industrial environment inside a control cabinet.","metaTitle":"Siemens 5SY7314-8 SENTRON MCB, D-Curve 3P, 15kA/50kA","metaDescription":"Siemens 5SY7314-8 SENTRON miniature circuit breaker, D-curve, 3-pole, 15 kA per EN 60898-1 / 50 kA per IEC 60947-2. Active production, available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"D","according to EN 60898 rated value":"15 kA","according to IEC 60947-2 rated value":"50 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","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"0.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d9ca6ad2b39fd3e666eff57157253340.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=76407&mlfb=5SY7314-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7314-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY7314-8 and what is the lead time?","answer":"The 5SY7314-8 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead time and price."},{"question":"What breaking capacity does 5SY7314-8 have?","answer":"It carries a dual rating: 15 kA per IEC/EN 60898-1 and 50 kA per IEC 60947-2. The 50 kA figure applies under the industrial standard and is the one to use for panel fault-current calculations."},{"question":"What is the D-curve on this breaker for?","answer":"The D tripping characteristic allows higher inrush currents without tripping — typically 10 to 20 times the rated current. This makes it suitable for motor circuits, transformers, and other loads with a high starting surge."},{"question":"Will 5SY7314-8 drop into a panel specified around 5SY5240-7?","answer":"Both are 3-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY7314-8 has a D-curve versus the 5SY5240-7's different characteristic. Verify the tripping curve matches your circuit's inrush profile before substitution. The physical dimensions and modular width (3 units) are identical."},{"question":"What compliance documentation does Siemens provide for 5SY7314-8?","answer":"The breaker is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077. The housing is halogen-free and silicon-free. Standard documentation includes the declaration of conformity for CE marking and the UL recognition file."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7314-8","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/5SY7314-8 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}}