{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SN6402-8CP","brand":"Siemens","brandSlug":"siemens","productSlug":"5SN6402-8CP","canonicalUrl":"https://aoctrl.com/siemens/5SN6402-8CP","factsUrl":"https://aoctrl.com/api/mcp/products/5SN6402-8CP","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SN series MCB, 4-pole, 400 V AC, 6 kA (EN 60898) / 30 kA (IEC 60947-2), 4 modular width units, 72 mm wide.","salesMarkdown":"The Siemens 5SN6402-8CP is a 4-pole miniature circuit breaker from the SENTRON 5SN family, rated at 400 V AC with a breaking capacity of 6 kA according to EN 60898 and 30 kA according to IEC 60947-2. The 6 kA breaking capacity under EN 60898 covers standard domestic and commercial fault levels; the 30 kA rating under IEC 60947-2 means it can also handle higher prospective short-circuit currents typical in industrial panels, so it can be specified in both contexts without an upstream current-limiting device in many cases. Rated at 400 V AC, 50 Hz, with a maximum of 440 V AC in multi-phase or single-phase operation. The DC rated maximum is 72 V, so it is not intended for high-voltage DC circuits. Mechanical service life is 10,000 operating cycles typical, and power loss is 1.2 W per pole at rated current in hot operating state — useful for thermal calculations in a densely populated panel. Accepts solid conductors up to 35 mm², which is generous for a 4-pole MCB of this size — sufficient for incoming feeds up to 63 A or so depending on the tripping characteristic (not specified here).","metaTitle":"Siemens 5SN6402-8CP MCB, 4-pole, 400 V AC, 6 kA EN 60898","metaDescription":"Siemens 5SN6402-8CP 4-pole MCB, rated 400 V AC, 6 kA per EN 60898, 30 kA per IEC 60947-2. Current production. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SN6402-8CP","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","description":"MCB 5SN","Number Of Poles":"4","lifecycle_stage":"current","Installation Depth":"70 mm","at DC rated value maximum":"72 V","Number Of Modular Width Units":"4","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"6 kA","Supply Voltage Frequency Rated Value":"50 Hz","according to IEC 60947-2 rated value":"30 kA","with multi-phase operation at AC maximum":"440 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","Connectable Conductor Cross-Section Solid Maximum":"35 mm²","Mechanical Service Life (Operating Cycles) Typical":"10 000","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/634de7d437cccd1e0047c87d24703c2b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1647302&mlfb=5SN6402-8CP"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SN6402-8CP?","answer":"It is rated 6 kA according to EN 60898 and 30 kA according to IEC 60947-2, so it covers both residential and industrial fault levels."},{"question":"Will 5SN6402-8CP drop into a panel specified around 5SY5416-7 without rewiring?","answer":"Both share the same depth (76 mm), height (90 mm), and installation depth (70 mm), but the 5SN6402-8CP is 72 mm wide (4 MW units) while the 5SY5416-7 is also 72 mm wide (4 MW units), so the footprint matches. However, the 5SY5416-7 carries a 10 kA EN 60898 rating and 15 kA IEC 60947-2 rating, so verify the required breaking capacity before swapping."},{"question":"Where can I buy 5SN6402-8CP and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SN6402-8CP","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/5SN6402-8CP 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}}