{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SN6402-7CP","brand":"Siemens","brandSlug":"siemens","productSlug":"5SN6402-7CP","canonicalUrl":"https://aoctrl.com/siemens/5SN6402-7CP","factsUrl":"https://aoctrl.com/api/mcp/products/5SN6402-7CP","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SN6 series, 4-pole miniature circuit breaker, C-curve, 400 V AC, 6 kA (EN 60898) / 30 kA (IEC 60947-2), order code 5SN6402-7CP.","salesMarkdown":"Its C-curve tripping characteristic suits it for general-purpose protection of mixed loads — lighting, small motors, control transformers — where moderate inrush currents (5–10× rated) are expected. ## Breaking capacity: what the dual rating means for your panel The 5SN6402-7CP carries two breaking-capacity ratings: 6 kA according to EN 60898 and 30 kA according to IEC 60947-2. The EN 60898 figure (6 kA) governs residential and light commercial installations where the prospective fault current is known to stay under that threshold. ## Voltage and pole configuration The four poles (4P) switch all live conductors, making it suitable for three-phase plus neutral applications. For DC circuits, the maximum rated voltage is 72 V — this is not a general-purpose DC breaker for higher voltages, so keep it on AC duty unless the DC voltage is within that limit. Rated for 10 000 mechanical operating cycles typical. Wire range up to 35 mm² solid, which handles most feeder and branch-circuit conductors.","metaTitle":"Siemens 5SN6402-7CP MCB 4-Pole C-Curve, 400V AC, 6kA/30kA","metaDescription":"Siemens 5SN6402-7CP 4-pole miniature circuit breaker, C-curve, 400V AC, rated 6 kA per EN 60898 and 30 kA per IEC 60947-2. Active production, available to order. Request RFQ for cu","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":"5SN6402-7CP","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/57283c3b7cf170ded35e61c382da2aab.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1647301&mlfb=5SN6402-7CP"},"ai":{"faq":[{"question":"What are the key ratings for 5SN6402-7CP?","answer":"4-pole, C-curve, rated 400 V AC at 50 Hz, with a breaking capacity of 6 kA per EN 60898 and 30 kA per IEC 60947-2. Maximum DC voltage is 72 V. Operating temperature range -40 °C to +75 °C."},{"question":"Will 5SN6402-7CP drop into a panel specified around 5SY5416-7 without rewiring?","answer":"The 5SN6402-7CP shares the same 4-pole, 4-modular-width footprint (72 mm wide, 76 mm deep, 90 mm tall) as the 5SY5416-7, and both mount on standard DIN rail with a quick-assembly system. The key difference is the breaking capacity: the 5SN6402-7CP is rated 6 kA (EN 60898) / 30 kA (IEC 60947-2), while the 5SY5416-7 is rated 10 kA (EN 60898) / 15 kA (IEC 60947-2). If the panel's fault level is below 6 kA, the 5SN6402-7CP is a direct mechanical fit; above that, verify coordination."},{"question":"Where can I buy 5SN6402-7CP?","answer":"This part is sourced and quoted to order through independent distribution against an RFQ. 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/5SN6402-7CP","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/5SN6402-7CP 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}}