{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6640-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6640-6","canonicalUrl":"https://aoctrl.com/siemens/5SY6640-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6640-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6640-6, 4-pole miniature circuit breaker, 40 A, B characteristic, 6 kA per EN 60898 / 10 kA per IEC 60947-2, 4 MW, IP20.","salesMarkdown":"Four poles (3P+N) with neutral conductor switching, so it isolates all conductors on a three-phase plus neutral circuit. The 40 A rating is valid at 35 °C ambient; the datasheet provides a derating curve — 38.4 A at 40 °C, 37.6 A at 45 °C, 36.76 A at 50 °C, 35.92 A at 55 °C. Occupies 4 modular width units (72 mm wide, 90 mm tall, 76 mm deep, 70 mm installation depth). Any mounting position accepted. Combined terminal top and bottom — line and load can enter from either side, which simplifies busbar routing in a distribution board. Sealable, so the panel builder can lock the toggle position after commissioning. IP20 with connected conductors — protected against finger contact, not against water ingress. Install inside a panel or enclosure that provides the environmental seal. Halogen-free and silicon-free construction, which matters for outgassing-sensitive environments like clean rooms or electronics assembly. The 5SY6640-6 is an active catalog line within the Siemens SENTRON family.","metaTitle":"Siemens 5SY6640-6 SENTRON MCB, 40A 4P B-curve, 6/10kA","metaDescription":"Siemens 5SY6640-6 SENTRON miniature circuit breaker, 40A, 4-pole, B-curve, 6kA (EN 60898) / 10kA (IEC 60947-2). Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY6640-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 6kA, 3+N-pole B, 40A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P+N","Number Of Poles":"4","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","at AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","according to EN 61346-2":"F","at 35 °C / rated value":"40 A","at 40 °C / rated value":"38.4 A","at 45 °C / rated value":"37.6 A","at 50 °C / rated value":"36.76 A","at 55 °C / rated value":"35.92 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"4","Tripping Characteristic Class":"B","Position / Of Power Supply Cord":"Any","according to EN 60898 / rated value":"6 kA","according to IEC 60947-2 / rated value":"10 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage / Of The Operating Voltage":"AC","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","at DC / according to IEC 60947-2 / rated value":"15 kA","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","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/051bf22c718a2c9fcd74100b6928e6b7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=32701&mlfb=5SY6640-6"},"ai":{"faq":[{"question":"Where can I buy 5SY6640-6 and how do I get a price?","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 price and lead time."},{"question":"What compliance documentation does Siemens provide for 5SY6640-6?","answer":"The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL1077. Halogen-free and silicon-free. Function designation F per EN 61346-2 and IEC 81346-2."},{"question":"What is 5SY6640-6's depth and width?","answer":"Depth is 76 mm, width is 72 mm (4 modular width units), height is 90 mm. Installation depth is 70 mm."},{"question":"Will 5SY6640-6 drop into a panel specified around 5SY7210-7CC without rewiring?","answer":"Both are 4-pole SENTRON MCBs in the same mechanical footprint (4 MW, same DIN-rail clip). The 5SY6640-6 is a 40 A B-curve; the 5SY7210-7CC is a different rating/curve. If the panel busbar and load wiring are sized for 40 A, the physical swap is straightforward — but verify the tripping characteristic and breaking capacity match the circuit design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6640-6","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/5SY6640-6 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}}