{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SN6401-8CP","brand":"Siemens","brandSlug":"siemens","productSlug":"5SN6401-8CP","canonicalUrl":"https://aoctrl.com/siemens/5SN6401-8CP","factsUrl":"https://aoctrl.com/api/mcp/products/5SN6401-8CP","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SN series MCB, 4-pole, 400 V AC, 50 Hz, 6 kA (EN 60898) / 30 kA (IEC 60947-2), 4 modular width units, 72 mm wide.","salesMarkdown":"## Siemens 5SN6401-8CP — 4-Pole Miniature Circuit Breaker The Siemens 5SN6401-8CP is a 4-pole miniature circuit breaker from the SENTRON 5SN series, rated for 400 V AC at 50 Hz. It carries a breaking capacity of 6 kA per EN 60898 and 30 kA per IEC 60947-2 — the higher IEC figure is the one that governs industrial panel coordination when the upstream transformer can deliver that fault current. The 30 kA rating under IEC 60947-2 is the industrial-grade figure — it tells you this MCB can interrupt a 30 kA prospective fault current without welding its contacts or failing catastrophically, which is the number a panel builder needs for the SCCR declaration on the nameplate. Rated for multi-phase and single-phase operation at 440 V AC maximum, with a DC-side rating of 72 V maximum. The 4-pole configuration (4 modular width units, 72 mm wide) means it switches all three phases plus neutral — or four line conductors in a split-phase arrangement — in a single DIN-rail footprint. Installation depth is 70 mm, overall depth 76 mm, height 90 mm. Terminal capacity accepts solid conductors up to 35 mm², which covers most panel feed-throughs up to the 40–63 A range typical for this frame size. The 72 mm width (4 modular units) occupies four 18 mm positions. Allow 70 mm clearance behind the rail for the housing depth; the overall depth of 76 mm includes the front toggle. Terminal screws accept solid or stranded copper; torque to the value printed on the device side.","metaTitle":"Siemens 5SN6401-8CP MCB 4-Pole, 6 kA EN 60898, 30 kA IEC 609","metaDescription":"Siemens 5SN6401-8CP MCB, 4-pole, 400 V AC, 50 Hz, rated 6 kA per EN 60898 and 30 kA per IEC 60947-2. Active production. Available to order against RFQ.","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":"5SN6401-8CP","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":"1.1 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d7910214fee541a63a8906c76f445202.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1647300&mlfb=5SN6401-8CP"},"ai":{"faq":[{"question":"Where can I buy 5SN6401-8CP and what is the lead time?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SN6401-8CP?","answer":"6 kA per EN 60898 and 30 kA per IEC 60947-2. The 30 kA figure is the one to use for industrial panel SCCR calculations."},{"question":"Will 5SN6401-8CP drop into a panel specified around 5SL4363-7 without rewiring?","answer":"The 5SN6401-8CP is 72 mm wide (4 modular units) versus 54 mm (3 units) for the 5SL4363-7. It occupies one extra DIN-rail position. Terminal capacity and voltage ratings differ — verify the existing wiring gauge and fault current coordination before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SN6401-8CP","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/5SN6401-8CP 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}}