{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SN6303-7CP","brand":"Siemens","brandSlug":"siemens","productSlug":"5SN6303-7CP","canonicalUrl":"https://aoctrl.com/siemens/5SN6303-7CP","factsUrl":"https://aoctrl.com/api/mcp/products/5SN6303-7CP","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SN series, MCB 5SN, order code 5SN6303-7CP, 3-pole, 400 V AC, C-curve, 6 kA (EN 60898) / 30 kA (IEC 60947-2).","salesMarkdown":"## Siemens 5SN6303-7CP — SENTRON 3-Pole MCB, C-Curve The Siemens 5SN6303-7CP is a 3-pole miniature circuit breaker from the SENTRON 5SN family, rated for 400 V AC at 50 Hz with a C tripping characteristic. Its breaking capacity is 6 kA per EN 60898 and 30 kA per IEC 60947-2 — the higher IEC figure governs industrial panel coordination where fault current can exceed 10 kA. The 3-pole construction handles three-phase loads up to 440 V AC maximum. The 90 mm height keeps it aligned with adjacent SENTRON devices in a multi-row enclosure. Terminals accept solid conductors up to 35 mm², sufficient for downstream feeder wiring in a sub-distribution board. Power loss per pole is 1.3 W in hot operating state — factor this into enclosure thermal calculations when grouping multiple breakers. ## Environmental Range and DC Capability On the DC side, it handles up to 72 V — useful for control-circuit protection in the same enclosure.","metaTitle":"Siemens 5SN6303-7CP SENTRON MCB, 3-Pole, 6kA/30kA, C-Curve","metaDescription":"Siemens 5SN6303-7CP SENTRON 5SN miniature circuit breaker, 3-pole, 400 V AC, C-curve, 6 kA per EN 60898 / 30 kA per IEC 60947-2. Active production, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SN6303-7CP","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","description":"MCB 5SN","Number Of Poles":"3","lifecycle_stage":"current","Installation Depth":"70 mm","at DC rated value maximum":"72 V","Number Of Modular Width Units":"3","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":"1.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9b67a65b62383fb25a41065a63c85d24.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1647273&mlfb=5SN6303-7CP"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SN6303-7CP?","answer":"It is rated 6 kA per EN 60898 and 30 kA per IEC 60947-2. The higher IEC rating applies for industrial panel coordination; the EN rating covers residential and commercial distribution."},{"question":"Will the 5SN6303-7CP drop into a panel designed for the 5SL4363-7?","answer":"Both share the same 54 mm width (3 MW), 76 mm depth, and 70 mm installation depth, so the physical fit is identical. The key difference is breaking capacity: the 5SL4363-7 is rated 10 kA per both standards, while the 5SN6303-7CP offers 6 kA (EN) / 30 kA (IEC). Verify the required fault level before substituting."},{"question":"Where can I buy the 5SN6303-7CP?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Contact us with your quantity and target price for a current quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SN6303-7CP","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/5SN6303-7CP 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}}