{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6120-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6120-6","canonicalUrl":"https://aoctrl.com/siemens/5SL6120-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6120-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6120-6, 1-pole miniature circuit breaker, B characteristic, 20 A rated, 6 kA breaking capacity per IEC 60898 / IEC 60947-2, 230/400 V AC.","salesMarkdown":"The Siemens 5SL6120-6 is a 1-pole SENTRON miniature circuit breaker rated 20 A with a B tripping characteristic, breaking 6 kA at 230/400 V AC per both EN 60898 and IEC 60947-2. This is an active, current-production part — no end-of-life notice, no last-time-buy window to track. The 5SL6120-6 is a standard catalogue item in the SENTRON family, so it's routinely available through independent distribution channels. If you're holding spares for a panel that uses these, you can still order fresh units without worrying about a manufacturer cut-off. That's fast enough to protect 1.5 mm² and 2.5 mm² copper wiring in final circuits, but it won't nuisance-trip on the modest inrush of a tungsten lighting bank or a small power supply. If you're feeding motor loads or capacitive drivers, step up to a C-curve sibling — but for general-purpose distribution, B is the default. In a densely populated board with multiple MCBs, that heat adds up — account for it in your thermal derating if the enclosure is sealed or stacked without ventilation gaps. The 10 000 mechanical operating cycles typical service life means it's not a daily-switch duty device; it's a protective device that you operate occasionally for isolation or testing. Sealable construction (yes) and halogen-free / silicon-free materials matter for installations that require low-smoke, zero-halogen cable management or where silicone outgassing could contaminate sensitive contacts.","metaTitle":"Siemens 5SL6120-6 SENTRON MCB, 1P B 20A 6kA","metaDescription":"Siemens 5SL6120-6 SENTRON miniature circuit breaker, 1-pole, B-curve, 20 A, 6 kA per IEC 60898/60947-2. Active production, available to order. Depth 76 mm, width 18 mm.","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":"5SL6120-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 6kA, 1-pole, B, 20 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Mounting Position":"any","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","Energy Limitation Class":"3","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":"6 kA","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","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":"2.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e5562d13cec3f78d16b1ae750ea4f1d0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=173845&mlfb=5SL6120-6"},"ai":{"faq":[{"question":"Where can I buy 5SL6120-6 and get a price?","answer":"We source and quote the 5SL6120-6 to order against an RFQ. Availability and current pricing are confirmed at quote time through our independent distribution channel."},{"question":"What is the depth of 5SL6120-6?","answer":"The 5SL6120-6 has a listed depth of 76 mm, with an installation depth of 70 mm. Width is 18 mm (1 modular unit) and height is 90 mm."},{"question":"What compliance documentation does Siemens provide for 5SL6120-6?","answer":"The 5SL6120-6 carries ratings per EN 60898 and IEC 60947-2 (6 kA breaking capacity), is halogen-free and silicon-free, and is rated for overvoltage category III and pollution degree 2. Typical documentation includes a CE declaration of conformity and the manufacturer's datasheet covering the SENTRON series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6120-6","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/5SL6120-6 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}}