{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6402-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6402-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6402-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6402-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6402-7 miniature circuit breaker, 4-pole, C tripping characteristic, 6 kA (EN 60898-1) / 30 kA (IEC 60947-2) breaking capacity, 400 V AC, 72 mm width, 76 mm depth.","salesMarkdown":"The Siemens SENTRON 5SY6402-7 is a 4-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated 400 V AC and occupying 4 modular width units (72 mm) on a DIN rail. The 4-pole design switches all three phases plus the neutral, though the neutral conductor is not switched internally — a point to confirm if your load side requires a switched neutral. ## C-curve and breaking capacity — what they mean on the line The 6 kA rating under EN 60898-1 covers the typical prospective short-circuit current in a sub-distribution board; the 30 kA rating under IEC 60947-2 gives you headroom if this breaker sits close to a large transformer or in a high-fault industrial MCC. For DC circuits, it breaks 15 kA at 60 V (max 72 V DC), so it can also serve as a DC feeder breaker in control cabinets or solar combiner boxes up to that voltage. The 70 mm installation depth (76 mm overall) fits standard distribution boards and small enclosures. Sealable with a lead seal or tag for tamper-proofing after commissioning.","metaTitle":"Siemens 5SY6402-7 SENTRON MCB, 4P C-curve, 6kA/30kA","metaDescription":"Siemens 5SY6402-7 SENTRON miniature circuit breaker, 4-pole C-curve, 6 kA per EN 60898-1 / 30 kA per IEC 60947-2. Current production, sourced to order. Quoted on request.","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":"5SY6402-7","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, 4-pole, C, 2A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","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":"No","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":"30 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","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a50b4299a39045d00c019d7a445a8f14.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=369730&mlfb=5SY6402-7"},"ai":{"faq":[{"question":"What is 5SY6402-7's breaking capacity at 400 V AC?","answer":"6 kA per EN 60898-1 for standard branch circuit protection, and 30 kA per IEC 60947-2 for industrial panel applications with higher fault current."},{"question":"Will 5SY6402-7 drop into a panel that was specified around 5SY4140-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint and 72 mm width, so the mechanical fit is identical. The 5SY6402-7 carries a C-curve versus the 5SY4140-7's D-curve — check your load's inrush profile before swapping, but the wiring and busbar positions are the same."},{"question":"Where can I buy 5SY6402-7?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6402-7","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/5SY6402-7 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}}