{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6640-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6640-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6640-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6640-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6640-7 miniature circuit breaker, 4-pole 3P+N, tripping characteristic C, breaking capacity 6 kA per EN 60898-1 / 10 kA per IEC 60947-2, 400 V AC, 72 x 90 x 76 mm.","salesMarkdown":"That matters when you need full isolation on a TN-S or TN-C-S system and don't want to rely on a separate neutral link. Tripping characteristic C means it holds through inrush up to 5–10× rated current before the magnetic trip fires — standard for motor-starter and light-industrial loads where a brief surge is normal but a hard fault needs fast clearing. Breaking capacity is rated 6 kA per EN 60898-1 and 10 kA per IEC 60947-2 at 400 V AC, with a DC rating of 15 kA at 60–72 V per IEC 60947-2. Under UL 1077 / CSA C22.2 No.235 it carries 5 kA. That dual-standard rating means it qualifies for both IEC distribution panels and North American supplementary-protection applications — one part for mixed-spec machines. Snaps onto DIN rail via the quick-assembly system — 4 modular width units (72 mm wide, 90 mm tall, 76 mm deep with 70 mm installation depth). Mounting position any, so you can lay it sideways in a tight gland-plate layout without derating the thermal trip. Combined terminal top and bottom — line and load can land on either side, which saves a crossover wire when you're feeding a busbar from the bottom. Sealable, halogen-free, silicon-free — relevant if the panel goes into a food-processing or semiconductor fab where outgassing is a concern. Ambient temperature range -40 °C to +75 °C, with humidity derating: max 95% RH at 55 °C, tapering to 35% at 75 °C. Overvoltage category III — suitable for fixed-installation distribution boards, not just downstream equipment. Energy limitation class 3 — the breaker limits let-through energy enough to protect downstream components in a fault. Rated for mechanical engineering and industry per the manufacturer's suitability designation — not a residential-grade device. Frequency 50/60 Hz, operating voltage up to 440 V AC single- or multi-phase.","metaTitle":"Siemens 5SY6640-7 SENTRON MCB, 4-pole C-curve, 6/10 kA","metaDescription":"Siemens 5SY6640-7 SENTRON miniature circuit breaker, 4-pole 3P+N, C-curve, 6 kA (EN 60898) / 10 kA (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":"5SY6640-7","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 C, 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","at AC rated value":"400 V","at DC rated value":"60 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","Energy Limitation Class":"3","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 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","at DC according to IEC 60947-2 rated value":"15 kA","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","with single-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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6b28caf042b7460c105238488f60cdfc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=358359&mlfb=5SY6640-7"},"ai":{"faq":[{"question":"Where can I buy 5SY6640-7 and what is the lead time?","answer":"Sourced and quoted to order through independent distribution. Availability and current pricing are confirmed at quote time against an RFQ — no stock or lead-time figures can be stated here."},{"question":"What is the closest functional second-source to 5SY6640-7 — 5SY4140-7?","answer":"The 5SY4140-7 is the same SENTRON family and same 4-pole C-curve footprint, but it carries a different breaking-capacity tier. 5SY6640-7 is rated 6 kA (EN 60898) / 10 kA (IEC 60947-2); 5SY4140-7 is rated lower. If your fault-current study calls for 10 kA at the panel, 5SY6640-7 is the one — 5SY4140-7 won't cover that. Check the nameplate rating before substituting."},{"question":"Will 5SY6640-7 drop into a panel specified around 5SY4140-7 without rewiring?","answer":"Physically yes — same 4-module DIN-rail footprint (72 mm wide, 90 mm tall, 76 mm deep), same terminal arrangement, same 3P+N pole configuration. No rewiring needed for the swap. The only difference is the interrupting rating; make sure the available fault current doesn't exceed the 5SY4140-7's lower rating if you're going the other direction."},{"question":"What compliance documentation does Siemens provide for 5SY6640-7?","answer":"The breaker is certified to IEC / EN 60898-1 and IEC / EN 60947-2, plus UL 1077 and CSA C22.2 No.235 for North American supplementary protection. It is halogen-free and silicon-free. Standard Siemens declarations of conformity (CE, UKCA) and RoHS/REACH statements are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6640-7","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/5SY6640-7 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}}