{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6403-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6403-7","canonicalUrl":"https://aoctrl.com/siemens/5SL6403-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6403-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6403-7, 4-pole miniature circuit breaker, C-curve, 3 A rated at 400 V AC, 6 kA breaking capacity.","salesMarkdown":"The Siemens 5SL6403-7 is a SENTRON 4-pole miniature circuit breaker (MCB) with a C tripping characteristic, rated 3 A at 400 V AC. Its 6 kA breaking capacity, certified to both EN 60898 and IEC 60947-2, covers the majority of residential and light commercial fault-current scenarios — enough for a sub-distribution board feeding general-purpose socket circuits or lighting, but undersized for industrial main feeders where 10 kA or higher is typical. At 30 °C ambient it holds a full 3 A; at 55 °C it derates to 2.62 A — account for the thermal stack inside a crowded enclosure. The 72 V DC maximum rating means this MCB can switch DC control circuits up to that voltage, but its primary duty is AC. Mounting position is unrestricted. Halogen-free and silicon-free construction simplifies disposal and avoids outgassing concerns in sensitive environments.","metaTitle":"Siemens 5SL6403-7 SENTRON MCB, 4P C-Curve 3A 6kA","metaDescription":"Siemens 5SL6403-7 SENTRON 4-pole MCB, C-curve, 3 A, 6 kA breaking capacity per IEC 60898. Rated 400 V AC. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SL6403-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 4-pole, C, 3A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"3 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 30 °C / rated value":"3 A","at 40 °C / rated value":"2.85 A","at 45 °C / rated value":"2.79 A","at 55 °C / rated value":"2.62 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","acc. to IEC 60947-2 / rated value":"6 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Influence Of The Surrounding Temperature":"Periodically +55°C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/30ebaf91390ce41344ed22b053eec81a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=289046&mlfb=5SL6403-7"},"ai":{"faq":[{"question":"Where can I buy the 5SL6403-7?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the difference between 5SL6403-7 and 5SL4363-7?","answer":"The 5SL4363-7 is a 4-pole C-curve MCB with a higher 6 A rating. The physical footprint (72 mm wide, 4 MW) and breaking capacity are identical, so it drops into the same panel position without rewiring — only the overcurrent threshold changes. If your load requires 3 A protection, the 5SL6403-7 is the correct choice."},{"question":"What is the depth of the 5SL6403-7?","answer":"The depth is 76 mm, with an installation depth of 70 mm. This is the dimension from the DIN-rail front to the back of the breaker — verify enclosure depth clearance before mounting."},{"question":"Will the 5SL6403-7 fit a panel designed for the 5SL4363-7?","answer":"Yes. Both share the same 72 mm width (4 MW), 90 mm height, and 76 mm depth. The mounting position, DIN-rail clip, and terminal layout are identical — no rewiring or panel modification needed."},{"question":"What compliance documentation does Siemens provide for the 5SL6403-7?","answer":"As a SENTRON MCB, it carries IEC/EN 60898 and IEC 60947-2 certifications for breaking capacity. The construction is halogen-free and silicon-free. Standard Siemens documentation includes a CE declaration of conformity and RoHS compliance information — request these with your RFQ if needed for quality documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6403-7","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/5SL6403-7 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}}