{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL1120-6MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL1120-6MB","canonicalUrl":"https://aoctrl.com/siemens/5SL1120-6MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL1120-6MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL1120-6MB, miniature circuit breaker, 1-pole, B-curve, 20 A, 3 kA (IEC 60947-2), 230/400 V AC, 1 MW unit, IP20.","salesMarkdown":"The Siemens SENTRON 5SL1120-6MB is a 1-pole miniature circuit breaker with B-curve tripping characteristic, rated 20 A at 230/400 V AC. The single-module (18 mm) width and 76 mm depth fit standard DIN-rail enclosures without crowding adjacent ways. B-curve (per EN 60898) means the magnetic trip activates at 3 to 5 times rated current — so 60 to 100 A instantaneous. That suits resistive and lighting loads with modest inrush; it avoids nuisance tripping on cable charging but clears a hard short fast. In a residential board fed by a 6 kA or 10 kA upstream device, this breaker is coordinated downstream — the upstream MCB or fuse clears faults above 3 kA before this unit sees them. The 18 mm width (1 modular unit) and 70 mm installation depth leave room for cable bending and adjacent devices. Halogen-free and silicon-free construction reduces toxic smoke and contact corrosion in a fire event.","metaTitle":"Siemens 5SL1120-6MB SENTRON MCB, 1P B 20A 3kA","metaDescription":"Siemens SENTRON 5SL1120-6MB miniature circuit breaker, 1-pole, B-curve, 20 A, 3 kA per IEC 60947-2. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","title":"5SL1120-6MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400V 3kA, 1pole, B, 20A","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","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":"230 V","according to IEC 60947-2 rated value":"3 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":"253 V","Mechanical Service Life (Operating Cycles) Typical":"4 000","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/e63c54097e4d07ac8bc0e7098e85587c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1046703&mlfb=5SL1120-6MB"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL1120-6MB?","answer":"It is rated 3 kA per IEC 60947-2 at 230/400 V AC. For applications requiring a higher interrupting rating, the 5SL series includes 4.5 kA and 6 kA variants (e.g., 5SL3116-6MB and 5SL6132-6MB) in the same 1-pole, 18 mm footprint."},{"question":"Will the 5SL1120-6MB drop into a panel specified for the 5SL3116-6MB?","answer":"Yes — same 18 mm width, 76 mm depth, 70 mm installation depth, and DIN-rail mounting. The only differences are the current rating (20 A vs. 16 A) and the breaking capacity (3 kA vs. 4.5 kA per EN 60898). No rewiring or enclosure modification is needed."},{"question":"Where can I buy the 5SL1120-6MB and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — no stock figures or price lists are published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL1120-6MB","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/5SL1120-6MB 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}}