{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4108-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4108-6","canonicalUrl":"https://aoctrl.com/siemens/5SL4108-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4108-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SL4108-6, 1-pole, B-curve, 8 A rated, 10 kA breaking capacity per EN 60898, 1 modular width (18 mm).","salesMarkdown":"The Siemens SENTRON 5SL4108-6 is a 1-pole miniature circuit breaker with a B tripping characteristic, rated 8 A at 30 °C and 400 V AC, with a 10 kA breaking capacity per EN 60898 and IEC 60947-2. ## Thermal derating and ambient limits At 40 °C it derates to 7.39 A, at 45 °C to 7.04 A, and at 55 °C to 6.37 A. If the panel runs hot — near a drive or transformer — size the breaker for the actual load at the expected ambient, not the 30 °C nameplate. The breaker itself is rated for -40 to 75 °C storage and operation, so it handles cold warehouses or rooftop enclosures. The B-curve trips at 3-5× In, so it's a good fit for resistive and lighting loads — not for motor starting, where a C or D curve would avoid nuisance trips. ## Physical fit and accessories Width is 18 mm — one modular unit — so it occupies a single slot on the DIN rail. The breaker accepts supplementary devices (shunt trip, auxiliary contacts, alarm switch) on the side, per the product extension feature. Sealable terminals (yes) let the panel builder lock the cover after commissioning. Rated IP20 with conductors connected, pollution degree 2, overvoltage category III — standard for enclosed distribution boards. Current production — no phase-out or last-time-buy notice on record. The 5SL4108-6 is an active catalog item in the SENTRON family.","metaTitle":"5SL4108-6 SENTRON MCB, 1P, 8A, B-curve, 10kA","metaDescription":"Siemens SENTRON 5SL4108-6 miniature circuit breaker, 1-pole, 8 A, B characteristic, 10 kA breaking capacity per EN 60898. Current production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SL4108-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 10kA, 1-pole, B, 8A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"8 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","at 30 °C rated value":"8 A","at 40 °C rated value":"7.39 A","at 45 °C rated value":"7.04 A","at 55 °C rated value":"6.37 A","Energy Limitation Class":"3","according to EN 61346-2":"F","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"1","Tripping Characteristic Class":"B","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"10 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"250 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.4 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b740b0085421af97c0af69348f11467c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=311537&mlfb=5SL4108-6"},"ai":{"faq":[{"question":"What is 5SL4108-6's depth and width?","answer":"Depth is 76 mm overall (70 mm installation depth), width is 18 mm (one modular unit)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4108-6","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/5SL4108-6 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}}