{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7640-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7640-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7640-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7640-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7640-7CC, miniature circuit breaker, 3P+N, 40 A, C-curve, 25 kA at 400 V AC per IEC 60947-2, 4 MW, snap-on mounting.","salesMarkdown":"That's the figure that decides coordination in a distribution board. The 25 kA rating at 400 V AC (IEC 60947-2) is the one that governs selectivity — if your upstream breaker is rated 36 kA or higher, you need to verify the let-through energy matches. For UL 1077 / CSA C22.2 No. 235 installations, the same breaker carries a 5 kA rating, so it's supplementary protection in North American panels unless the SCCR study supports it. The C-curve means magnetic trip between 5x and 10x In — 200 to 400 A — which covers most motor and lighting loads but won't nuisance-trip on capacitor switching or long cable runs. The 3P+N design switches the neutral, which is required for TT or IT earthing systems and some medical or UPS feeds where you need guaranteed isolation on all poles. Environmental specs matter out here in the grease: IP20 with conductors connected — fine inside a sealed panel, not for washdown zones. Vibration resistance per IEC 60068-2-6 (±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz) covers most rotating equipment routes — it'll survive next to a 200 hp pump motor. Halogen-free and silicon-free matters if this goes into a clean room or semiconductor fab where outgassing kills yield.","metaTitle":"Siemens 5SY7640-7CC SENTRON MCB, 40 A C-Curve 3P+N, 25 kA","metaDescription":"Siemens 5SY7640-7CC SENTRON miniature circuit breaker, 40 A, C-curve, 3P+N, 25 kA breaking capacity at 400 V AC per IEC 60947-2. 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":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","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","at AC rated value":"400 V","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","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to IEC 60947-2 rated value":"25 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","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"3.5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ef8ba0edbdcbeda907b04124f0b5b6cd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=483302&mlfb=5SY7640-7CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7640-7CC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY7640-7CC and get a price?","answer":"The 5SY7640-7CC is 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's the breaking capacity of 5SY7640-7CC at 400 V?","answer":"The 5SY7640-7CC has a 25 kA breaking capacity at 400 V AC per IEC 60947-2. Under UL 1077 / CSA C22.2 No. 235 it's rated 5 kA."},{"question":"Will 5SY7640-7CC drop into a panel specified for 5SY4304-7CV?","answer":"Both are 4-module-width SENTRON MCBs on the same DIN-rail footprint, so mechanical fit is identical. The 5SY7640-7CC is a 40 A C-curve; the 5SY4304-7CV is a lower-current variant. Check the ampacity and coordination study — if the panel was built for a 40 A feed, this is a direct drop-in. For a lower-rated branch, verify the upstream protection doesn't exceed the wire rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7640-7CC","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/5SY7640-7CC 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}}