{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6514-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6514-8","canonicalUrl":"https://aoctrl.com/siemens/5SY6514-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6514-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6 series, miniature circuit breaker, order code 5SY6514-8, D tripping characteristic, 0.3 A rated current, 2-pole (1P+N), 230 V AC, 6 kA (EN 60898) / 30 kA (IEC 60947-2).","salesMarkdown":"## What this 0.3 A D-curve MCB is for The Siemens 5SY6514-8 is a SENTRON miniature circuit breaker with a D tripping characteristic, rated 0.3 A at 230 V AC on a 50/60 Hz line. ## Pole config and what it connects Two-pole construction, wired as 1P+N — the neutral pole switches with the phase, which is required for TN-S or TT systems where you want a guaranteed disconnection of both conductors. Rated voltage is 230 V AC single-phase, with a maximum of 250 V AC in single-phase operation. That DC rating covers 48 V control loops and 60 V battery banks common in industrial backup supplies. Temperature range -40 to 75 °C covers most unheated plant environments. Rated breaking capacities are certified per EN 60898 (6 kA) and IEC 60947-2 (30 kA AC, 15 kA DC). UL 1077 and CSA C22.2 No.235 listing at 5 kA AC covers North American supplementary protection applications. Overvoltage category III, touch protection integrated, sealable for lockout/tagout.","metaTitle":"Siemens 5SY6514-8 SENTRON MCB, D Curve 0.3 A 2-Pole, 6/30 kA","metaDescription":"Siemens 5SY6514-8 SENTRON miniature circuit breaker, D tripping characteristic, 0.3 A rated, 2-pole 1P+N, 6 kA per EN 60898 / 30 kA per IEC 60947-2, 230 V AC. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"230 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"2","Number of poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY6","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"0.3 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"30 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","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Product function / neutral conductor switching":"Yes","with single-phase operation / at AC / rated value":"250 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=403006&mlfb=5SY6514-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6514-8/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY6514-8?","answer":"6 kA per EN 60898 for general distribution, 30 kA per IEC 60947-2 for industrial feeders, and 15 kA DC per IEC 60947-2 at 72 V DC."},{"question":"Will 5SY6514-8 drop into a panel specified around 5SY6140-6CC?","answer":"Both are 2-pole SENTRON 5SY6 design MCBs on the same DIN-rail footprint — same width (36 mm), same depth (76 mm), same installation depth (70 mm). The difference is the D-curve 0.3 A rating on the 5SY6514-8 versus the 5SY6140-6CC's rating; check your branch circuit's overcurrent requirement before swapping."},{"question":"Where can I buy 5SY6514-8 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time — no stock figures or lead-time numbers published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6514-8","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/5SY6514-8 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}}