{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6603-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6603-7","canonicalUrl":"https://aoctrl.com/siemens/5SL6603-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6603-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6603-7 miniature circuit breaker, 3A rated, C-curve trip characteristic, 4-pole (3P+N), 6kA breaking capacity at 400V AC, 72mm wide (4 MW).","salesMarkdown":"The Siemens 5SL6603-7 is a SENTRON miniature circuit breaker (MCB) rated 3 A with a C-curve trip characteristic, 4-pole (3P+N) construction, and a 6 kA breaking capacity per EN 60898 at 400 V AC. The C-curve means it holds through 5–10× rated current momentarily — enough for a motor starting or a capacitor bank charging — then clears fast. At 3 A, that's 15–30 A magnetic trip threshold. ## Temperature derating — the real-world current At 30 °C ambient, the 5SL6603-7 carries its full 3 A. But in a warm panel — say 40 °C — it derates to 2.85 A; at 45 °C it's 2.79 A; at 55 °C it drops to 2.62 A. That's not a bug, it's thermal protection physics: the bimetal strip heats faster in a hot enclosure, so the breaker trips earlier. If your panel runs warm, size up one amp rating to keep the circuit alive at full load. Mounting position is any — upright, sideways, upside-down — the trip curve doesn't care. IP20 with conductors connected, so it's for enclosed distribution boards only, not wet environments. Pollution degree 2, overvoltage category III — standard for fixed-installation final circuits.","metaTitle":"Siemens 5SL6603-7 SENTRON MCB, 3A C-Curve 4-Pole 6kA","metaDescription":"Siemens 5SL6603-7 SENTRON miniature circuit breaker, 3A rated, C-curve, 4-pole (3P+N), 6kA breaking capacity at 400V AC. Active production. 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":"5SL6603-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 3+N-pole, C, 3A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P+N","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","at AC / rated value":"3 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","according to EN 61346-2":"F","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","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","according to EN 60898 / rated value":"6 kA","supply voltage / at AC / rated value":"400 V","according to IEC 60947-2 / rated value":"6 kA","Type Of Voltage / Of The Operating Voltage":"AC","with multi-phase operation / at AC / maximum":"440 V","with multi-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e388cac4c7a42491597c177e1c07c953.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=53611&mlfb=5SL6603-7"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL6603-7?","answer":"The 5SL6603-7 has a 6 kA breaking capacity per both EN 60898 and IEC 60947-2 at 400 V AC."},{"question":"What does the C-curve mean on this breaker?","answer":"The C-curve means the magnetic trip activates at 5–10× the rated current (15–30 A for this 3 A unit), making it suitable for circuits with moderate inrush like small motors, lighting, and general-purpose sockets."},{"question":"Where can I buy the 5SL6603-7 and get current pricing?","answer":"The 5SL6603-7 is sourced and quoted to order against an RFQ through independent distribution channels. Current pricing and availability are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6603-7","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/5SL6603-7 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}}