{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6140-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6140-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL6140-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6140-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6140-7MB, miniature circuit breaker, 1-pole, C characteristic, 40 A at 30 °C, 6 kA per EN 60898, 1 MW.","salesMarkdown":"The Siemens SENTRON 5SL6140-7MB is a 1-pole miniature circuit breaker with a C tripping characteristic, rated 40 A at 30 °C and breaking 6 kA per EN 60898. That 6 kA rating is the standard fault-interruption capacity for residential and light commercial distribution boards — it safely clears a short-circuit up to that level without welding contacts or cascading damage upstream. The C-curve means the magnetic trip activates at 5 to 10 times rated current, so it tolerates the inrush of motor starters, small transformers, and fluorescent lighting banks without nuisance tripping on startup. Rated for single-phase operation at 250 V AC and multi-phase at 440 V AC, with a maximum operating voltage of 440 V AC. The 40 A rating is continuous at 30 °C ambient; the thermal-magnetic element derates naturally in a warmer panel — no external adjustment needed. IP20 with connected conductors means it is touch-safe when installed in a live distribution board but not rated for washdown or outdoor exposure. Mounting position is unrestricted, and the 18 mm width (1 modular unit) snaps onto standard DIN rail, occupying a single slot in a consumer unit or sub-distribution board. ## Panel Fit and Compliance Depth of 76 mm, width 18 mm, height 90 mm — installs in any standard DIN-rail enclosure with 70 mm installation depth clearance. The housing is halogen-free and silicon-free, so it does not outgas corrosive compounds in sealed panels or near sensitive contacts. Sealable with a lockable cover to prevent unauthorized switching. Rated for overvoltage category III and pollution degree 2, covering fixed installations downstream of the main distribution board. Mechanical service life is 10 000 switching cycles typical.","metaTitle":"Siemens 5SL6140-7MB SENTRON MCB, 1P C 40A 6kA","metaDescription":"Siemens 5SL6140-7MB SENTRON miniature circuit breaker, 1-pole, C-curve, 40 A rated at 30 °C, 6 kA breaking capacity per EN 60898. Active production. Quoted 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":"5SL6140-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 6kA, 1-pole, C, 40 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","acc. to IEC 81346-2":"F","at AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 30 °C / rated value":"40 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"6 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Type Of Voltage / Of The Operating Voltage":"AC","with multi-phase operation / at AC / maximum":"440 V","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"250 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/0d7ea632b0ba87061cb26e17d8bbc61f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=516241&mlfb=5SL6140-7MB"},"ai":{"faq":[{"question":"What is 5SL6140-7MB's breaking capacity?","answer":"It is rated 6 kA per EN 60898, sufficient for standard residential and light commercial fault levels."},{"question":"Will 5SL6140-7MB drop into a panel specified around 5SL6016-7KL?","answer":"Yes — both are 1-module-width (18 mm) SENTRON MCBs with identical 76 mm depth and 90 mm height, same DIN-rail footprint. The 5SL6140-7MB is a 1-pole, 40 A, C-curve unit; the 5SL6016-7KL is a 1P+N, 16 A, C-curve unit. No rewiring of the DIN-rail or enclosure is needed; swap the branch circuit rating as the load requires."},{"question":"Where can I buy 5SL6140-7MB?","answer":"Sourced and quoted to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6140-7MB","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/5SL6140-7MB 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}}