{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7640-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7640-6","canonicalUrl":"https://aoctrl.com/siemens/5SY7640-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7640-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON series, miniature circuit breaker, 5SY7640-6, 4-pole B-curve, 40 A rated, 15 kA (EN 60898) / 20 kA (IEC 60947-2).","salesMarkdown":"It breaks fault currents up to 15 kA per EN 60898 and 20 kA per IEC 60947-2, with a DC rating of 15 kA per the same standard. At 40 A on a 4-pole frame, this is a main or heavy feeder breaker in a distribution board, not a final-subcircuit device. ## Where it lands in a panel IP20 with conductors connected, so it lives inside an enclosure or distribution board, not exposed. The combined terminals top and bottom (box lug + clamp) accept a range of conductor sizes without needing separate accessories. ## Construction and environmental range Halogen-free and silicon-free construction — no outgassing that corrodes contacts in sealed enclosures. Operating temperature range -40 °C to 75 °C, with humidity derating above 55 °C (95% RH to 55 °C, 55% to 70 °C, 35% to 75 °C). Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. The neutral pole is switched (3P+N), so it breaks the neutral along with the phases — this matters for TN-S or TT systems where neutral isolation is required for maintenance safety.","metaTitle":"Siemens SENTRON 5SY7640-6 MCB, 4P B-Curve 40A 15kA","metaDescription":"Siemens SENTRON 5SY7640-6 miniature circuit breaker, 4-pole B-curve, 40 A rated, 15 kA (EN 60898) / 20 kA (IEC 60947-2). Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","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","at AC / rated value":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"20 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","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","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":"Yes","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 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=298500&mlfb=5SY7640-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7640-6/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 5SY7640-6?","answer":"40 A rated current at 400 V AC, B-curve trip characteristic, 15 kA breaking capacity per EN 60898 and 20 kA per IEC 60947-2, 4-pole 3P+N construction."},{"question":"Where can I buy the 5SY7640-6?","answer":"The 5SY7640-6 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the difference between the 5SY7640-6 and the 5SY7210-7CC?","answer":"The 5SY7210-7CC is a single-pole C-curve breaker at a lower current rating, while the 5SY7640-6 is a 4-pole B-curve at 40 A. They share the same SENTRON platform and DIN-rail footprint, but the pole count, curve, and rating differ — they are not drop-in replacements without rewiring the panel."},{"question":"What compliance documentation does Siemens provide for the 5SY7640-6?","answer":"The 5SY7640-6 carries approvals under EN 60898, IEC 60947-2, and UL 1077 / CSA C22.2 No. 235. Standard Siemens documentation includes RoHS and REACH declarations available through the product support portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7640-6","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/5SY7640-6 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}}