{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3140-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3140-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SL3140-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3140-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SL3140-7CC, 1-pole miniature circuit breaker, C-curve, 40 A rated current, 230/400 V, 4.5 kA breaking capacity.","salesMarkdown":"The Siemens 5SL3140-7CC is a 1-pole miniature circuit breaker with a C-trip curve, rated 40 A at 230/400 V AC with a 4.5 kA breaking capacity. At 40 A it handles a 9 kW resistive load on a 230 V line or a 17 kW three-phase load when ganged across poles. The 4.5 kA breaking capacity at 400 V is the standard domestic and light-commercial SCCR for this class — it safely interrupts a fault current up to 4.5 kA without welding the contacts or cascading the fault upstream. That is adequate for most final sub-circuits in a TN or TT system; if your available fault current exceeds 4.5 kA, you need a higher-rated breaker (the 5SL series also offers 6 kA and 10 kA variants). The 230/400 V rating covers both single-pole-to-neutral (230 V) and single-pole-to-phase (400 V in a 3-phase system) applications. The 40 A rating is the continuous thermal current — do not load it above 40 A even if the fault rating looks generous. The 1-pole width is 18 mm per module. Wire termination accepts up to 25 mm² conductor for the line and load sides — torque to 2.5 Nm per the terminal marking. No auxiliary contact slot on this base unit; add a separate 5ST3 auxiliary switch if remote status indication is needed.","metaTitle":"Siemens 5SL3140-7CC Miniature Circuit Breaker, 1-Pole C 40 A","metaDescription":"Siemens 5SL3140-7CC miniature circuit breaker, 1-pole, C-curve, 40 A, 230/400 V, 4.5 kA breaking capacity. Current-production lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"title":"5SL3140-7CC","description":"Miniature circuit breaker 230/400 V 4.5 kA, 1-pole, C, 40 A Circuit breaker 230/400 V 4.5 kA, 1-pole, C, 40 A","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b1643188e82dccaf14bf910e6116452d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=138918&mlfb=5SL3140-7CC"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCB?","answer":"The 5SL3140-7CC has a 4.5 kA breaking capacity at 230/400 V AC. That is the maximum fault current it can safely interrupt — verify your available fault current at the installation point before specifying."},{"question":"Where can I buy the 5SL3140-7CC?","answer":"This part is sourced to order against an RFQ through our independent distribution network. Submit a request for quote (RFQ) and we will confirm availability and current pricing at that time — no stock count or lead-time figure is published here."},{"question":"What does the C-curve mean on this breaker?","answer":"The C-trip curve means the breaker trips instantaneously at 5 to 10 times the rated current (200 A to 400 A for this 40 A unit). That characteristic handles moderate inrush from motor starters, lighting ballasts, or small transformers without nuisance tripping, while still protecting against short circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3140-7CC","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/5SL3140-7CC 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}}