{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6340-6CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6340-6CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6340-6CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6340-6CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6340-6CC, 3-pole miniature circuit breaker, B-curve, 40 A rated current, 400 V AC, 6 kA breaking capacity per EN 60898, 3 modular units wide.","salesMarkdown":"It carries a 6 kA breaking capacity per EN 60898 and a 5 kA rating per UL 1077 / CSA C22.2 No.235, so it handles standard branch-circuit protection in North American and IEC panels alike. At 400 V AC it clears faults up to 6 kA (EN 60898); for UL-listed panels the interrupting rating is 5 kA (UL 1077). That covers most commercial and light-industrial distribution boards, but not high-fault locations like utility tie points. It also carries a 72 V DC rating, so it can serve DC control circuits or small solar combiner boxes at that voltage, though the DC breaking capacity isn't separately stated — treat it as a supplementary protector for DC loads. The 3-module width (54 mm) and 76 mm depth fit standard DIN-rail enclosures; the quick-assembly fastening method and any-position mounting simplify panel layout. ## Deployment context Rated for mechanical engineering and industry per the manufacturer's suitability code. Combined top and bottom terminals allow feed-through wiring without extra busbars.","metaTitle":"Siemens 5SY6340-6CC SENTRON MCB, 3P B-Curve 40A 400V AC","metaDescription":"Siemens 5SY6340-6CC SENTRON miniature circuit breaker, 3-pole, B-curve, 40 A, 400 V AC, 6 kA (EN 60898). Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY6340-6CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 6kA, 3-pole, B, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"3","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","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY6CC","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"3","Tripping Characteristic Class":"B","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","operational current / at AC / rated value":"40 A","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":"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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a17b9c697a216a2b754177c80d70a98a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=467360&mlfb=5SY6340-6CC"},"ai":{"faq":[{"question":"What is the closest functional second-source for 5SY6340-6CC?","answer":"The 5SY7140-8CC is a peer in the same SENTRON family but carries a C-curve characteristic (5–10x In magnetic trip) versus the B-curve of the 5SY6340-6CC. For a direct drop-in without rewiring, stick with a B-curve 3-pole 40 A MCB in the same 3-module footprint; the 5SY7140-8CC would trip differently on inrush and may nuisance-trip on some loads."},{"question":"What compliance documentation does this brand provide for 5SY6340-6CC?","answer":"The part carries approvals per EN 60898 (6 kA) and UL 1077 / CSA C22.2 No.235 (5 kA). It is halogen-free and silicon-free. RoHS and REACH declarations are standard with the SENTRON series; request them at quote time."},{"question":"Where can I buy 5SY6340-6CC and what is the lead time?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6340-6CC","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/5SY6340-6CC 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}}