{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SN6450-8CP","brand":"Siemens","brandSlug":"siemens","productSlug":"5SN6450-8CP","canonicalUrl":"https://aoctrl.com/siemens/5SN6450-8CP","factsUrl":"https://aoctrl.com/api/mcp/products/5SN6450-8CP","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SN series MCB, 4-pole, C-curve, 400V AC, 6kA (EN 60898) / 10kA (IEC 60947-2), 72x90x76 mm (WxHxD).","salesMarkdown":"The 5SN6450-8CP: This 4-pole breaker occupies 4 modular width units (4 MW) on a standard DIN rail, with an installation depth of 70 mm behind the panel escutcheon. Overall dimensions are 72 mm wide, 90 mm high, and 76 mm deep — the depth includes the front toggle throw, so allow clearance for the handle arc when the panel door is closed. Solid conductor cross-section up to 35 mm² is accepted per pole, which is generous for a 4-pole MCB — enough for sub-feed or tap conductors in a distribution board without needing a reducer. ## Voltage and duty ratings Rated for multi-phase operation at 440 V AC maximum, and single-phase at 440 V AC. DC-side capability tops out at 72 V — this is a line-voltage AC breaker, not a DC string combiner box part. The 50 Hz frequency rating is fixed; it is not a 50/60 Hz dual-rated unit like some SENTRON siblings. Power loss per pole at rated current in hot operating state is 3.7 W, so a 4-pole assembly dissipates roughly 14.8 W internally. In a sealed, low-ventilation enclosure, that heat must be factored into the thermal budget — derating may apply above 40 °C ambient.","metaTitle":"Siemens 5SN6450-8CP MCB, 4-Pole C-Curve, 6kA/10kA","metaDescription":"Siemens SENTRON 5SN6450-8CP 4-pole miniature circuit breaker. 400V AC, C-curve, 6kA (EN 60898) / 10kA (IEC 60947-2). Active production. Quoted to order.","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":"5SN6450-8CP","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":"10 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":"3.7 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9b80fa3402a71f5f18dcb099f19318eb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1647322&mlfb=5SN6450-8CP"},"ai":{"faq":[{"question":"Where can I buy 5SN6450-8CP?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is 5SN6450-8CP's listed depth?","answer":"The overall depth is 76 mm, with an installation depth of 70 mm behind the panel escutcheon. The extra 6 mm accounts for the front toggle throw."},{"question":"What is 5SN6450-8CP's listed width?","answer":"Width is 72 mm, which corresponds to 4 modular width units on a standard DIN rail."},{"question":"Will 5SN6450-8CP drop into a panel specified around 5SL4363-7 without rewiring?","answer":"Not directly — 5SL4363-7 is a 3-pole, 3-module-width breaker (54 mm wide), while this 4-pole unit is 72 mm wide. The DIN-rail footprint is wider, so panel cutouts and busbar arrangements would need modification."},{"question":"What breaking capacity does 5SN6450-8CP carry?","answer":"It is rated 6 kA per EN 60898 and 10 kA per IEC 60947-2. The 10 kA figure is the one that matters for industrial panel coordination where the prospective fault current exceeds residential limits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SN6450-8CP","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/5SN6450-8CP 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}}