{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7340-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7340-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7340-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7340-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7340-8CC miniature circuit breaker, 3-pole D-curve, 40 A rated at 400 V AC, 15 kA breaking capacity per IEC 60947-2, 5 kA per UL 1077/CSA 22.2.","salesMarkdown":"The 5SY7340-8CC is a Siemens SENTRON miniature circuit breaker, 3-pole, D tripping characteristic, rated 40 A at 400 V AC. At 400 V AC the unit interrupts fault currents up to 15 kA (IEC 60947-2), which covers most industrial panel SCCR requirements; for North American installations the UL 1077 / CSA 22.2 No. 235 rating is 5 kA at the same voltage. The D-curve's wider magnetic trip band (10–20× In) avoids nuisance tripping on motor start, transformer energization, or capacitor bank switching. For DC circuits the maximum rated voltage is 72 V, so this is an AC-primary breaker. Occupies 3 width units (54 mm) on the rail. Mounting position any orientation. Touch protection built in.","metaTitle":"Siemens 5SY7340-8CC SENTRON MCB, 3P D-curve 40A 400V 15kA","metaDescription":"Siemens SENTRON 5SY7340-8CC miniature circuit breaker, 3-pole, D characteristic, 40 A rated at 400 V AC, 15 kA IEC breaking capacity. Current production. Quoted to order.","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","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","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":"5SY7CC","Suitability For Operation":"Mechanical engineering / industry","Tripping Characteristic Class":"D","at DC / rated value / maximum":"72 V","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","operating current / at AC / rated value":"40 A","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","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":"https://cdn.aoctrl.com/b408a456fda6aa1de566cbe18387b4a2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=350145&mlfb=5SY7340-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7340-8CC/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7340-8CC?","answer":"15 kA at 400 V AC per IEC 60947-2. For UL 1077 / CSA C22.2 No. 235 applications the rating is 5 kA."},{"question":"Will 5SY7340-8CC drop into a panel that was specified around 5SY6613-8?","answer":"Both are 3-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY6613-8 is a B-curve 13 A unit while this is a D-curve 40 A — different trip characteristics and current ratings. The mechanical fit is the same; the electrical substitution depends on whether the circuit requires D-curve inrush tolerance and 40 A continuous capacity."},{"question":"What compliance documentation does Siemens provide for 5SY7340-8CC?","answer":"The breaker carries IEC 60947-2 and UL 1077 / CSA C22.2 No. 235 certifications. It is halogen-free and silicon-free. Standard RoHS and REACH declarations are available from Siemens documentation."},{"question":"Where can I buy 5SY7340-8CC and how is it quoted?","answer":"Sourced to order through independent distribution channels. Submit an RFQ for current pricing and lead time — volume discounts apply on larger quantities."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7340-8CC","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/5SY7340-8CC 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}}