{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6314-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6314-8","canonicalUrl":"https://aoctrl.com/siemens/5SY6314-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6314-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6 series, miniature circuit breaker, 5SY6314-8, 3-pole, D characteristic, 0.3 A, 400 V AC, 6 kA / 30 kA breaking capacity.","salesMarkdown":"## What the ratings mean for fit The Siemens 5SY6314-8 is a SENTRON 5SY6 miniature circuit breaker, 3-pole, rated 0.3 A at 400 V AC with a D tripping characteristic. That D-curve means it tolerates the high inrush currents typical of motor and transformer loads — the magnetic trip threshold is 10–20× rated current, so it won't nuisance-trip on a starting compressor or a switched-mode supply bank. For a 0.3 A rating, that's a magnetic trip window of roughly 3–6 A instantaneous, which is appropriate for small inductive or capacitive loads where the inrush spike is brief but sharp. Breaking capacity is rated at 6 kA per EN 60898 and 30 kA per IEC 60947-2. The EN figure governs residential / light commercial distribution boards; the IEC figure applies when the breaker is used in industrial panels where the prospective fault current at the bus can be higher. For DC circuits, it carries 15 kA per IEC 60947-2 up to 72 V, and under UL 1077 / CSA C22.2 No. 235 it's rated 5 kA at AC — so it's recognized for North American supplementary protection applications as well. ## Panel integration and mounting Mounts via the quick-assembly system — snaps onto DIN rail, occupies 3 width units (54 mm). Installation depth is 70 mm; overall depth including terminals is 76 mm. Any mounting position is permitted, which simplifies layout in crowded enclosures. The breaker is sealable (provision for a lead seal or lockout tag) and carries touch protection on the terminals. Combined terminals (top and bottom) accept both busbar and conductor connections, and the supply cord position is unrestricted — wire from either end. Rated for 50/60 Hz, overvoltage category III. IP20 with connected conductors, so it's intended for enclosed panel use, not washdown or outdoor exposure.","metaTitle":"Siemens 5SY6314-8 SENTRON MCB, 3-pole D-curve 0.3 A","metaDescription":"Siemens 5SY6314-8 SENTRON miniature circuit breaker, 3-pole, D tripping characteristic, 0.3 A rated current, 6 kA (EN 60898) / 30 kA (IEC 60947-2). Current lifecycle stage. Sourced","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 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":"3","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":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"3","Number of poles / Note":"3P","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":"No","with multi-phase operation / at AC / rated value":"440 V","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=333633&mlfb=5SY6314-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6314-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SY6314-8 and get a price?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — no stock count or price figure is published here."},{"question":"What is the 5SY6314-8's depth?","answer":"Overall depth is 76 mm; installation depth (behind the panel face) is 70 mm."},{"question":"What compliance documentation does Siemens provide for the 5SY6314-8?","answer":"The breaker carries ratings per EN 60898 (6 kA), IEC 60947-2 (30 kA AC, 15 kA DC), and UL 1077 / CSA C22.2 No. 235 (5 kA AC). It is halogen-free and silicon-free. Standard Siemens declarations (CE, UKCA, RoHS, REACH) apply to the SENTRON 5SY6 series."},{"question":"Will the 5SY6314-8 drop into a panel specified around the 5SY6602-8?","answer":"Both are 3-pole SENTRON 5SY6 breakers on the same DIN-rail footprint (3 width units, 54 mm). The 5SY6602-8 is a higher-current variant (2 A vs 0.3 A) with the same D characteristic. Panel cutouts, busbar spacing, and terminal layout are identical — no rewiring of the bus or enclosure is needed for the swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6314-8","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/5SY6314-8 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}}