{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6240-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6240-6","canonicalUrl":"https://aoctrl.com/siemens/5SL6240-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6240-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6 series, miniature circuit breaker (MCB), 2-pole, B characteristic, 40 A, 6 kA per EN 60898, 400 V AC, IP20.","salesMarkdown":"The Siemens 5SL6240-6 is a 2-pole SENTRON miniature circuit breaker from the 5SL6 series, rated 40 A with a B tripping characteristic and a breaking capacity of 6 kA per EN 60898 at 400 V AC. This is the standard MCB for residential and infrastructure branch-circuit protection — think final subcircuits feeding general-purpose socket outlets or lighting in a panelboard. The B-curve (3–5× In) means it trips fast on moderate overloads, so it pairs with resistive and light inductive loads where inrush isn't extreme. The B-curve (3–5× In) determines the magnetic trip threshold: between 120 A and 200 A instantaneous. That's appropriate for general-purpose circuits feeding multiple outlets or lighting — not for motor circuits where higher inrush (C or D curve) would be needed to avoid nuisance trips. In a domestic or light commercial distribution board this is usually sufficient; if your fault level exceeds 6 kA at the point of installation, you'd need a higher-rated device upstream or a current-limiting backup fuse. The 2-pole configuration (switching both line and neutral, though neutral is not switched separately per) fits single-phase or split-phase circuits where both conductors need overcurrent protection. Rated voltage is 400 V AC between phases, with a maximum of 440 V in multi-phase operation. ## Deployment context Terminal capacity accepts 0.75 mm² to 25 mm² conductors, so it handles both final-circuit wiring and larger feeder tails.","metaTitle":"Siemens 5SL6240-6 SENTRON MCB, 2-pole B 40 A 6 kA","metaDescription":"Siemens 5SL6240-6 SENTRON miniature circuit breaker, 2-pole, 40 A, B-curve, 6 kA per EN 60898, 400 V AC. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"25 mm²","Minimum":"0.75 mm²","Sealable":"Yes","Rated Value":"50 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"5SL miniature circuit breakers","Energy limiting class":"3","Number of width units":"2","Number of poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SL6","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"40 A","Tripping characteristic class":"B","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"6 kA","acc. to IEC 60947-2 / rated value":"6 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"400 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1cc4e7bc18558c4c416486f421eebb6a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=389679&mlfb=5SL6240-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL6240-6/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of 5SL6240-6?","answer":"The 5SL6240-6 is a 2-pole miniature circuit breaker rated 40 A with B tripping characteristic, 6 kA breaking capacity per EN 60898, and 400 V AC rated voltage."},{"question":"Where can I buy 5SL6240-6 and what is the price?","answer":"The 5SL6240-6 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for 5SL6240-6?","answer":"The 5SL6240-6 is a Siemens SENTRON MCB designed to EN 60898 and IEC 60947-2, with touch protection, halogen-free and silicon-free construction. Standard RoHS and REACH declarations are part of the Siemens documentation package for this series."},{"question":"Will 5SL6240-6 drop into a panel specified for 5SL6606-7YA?","answer":"The 5SL6240-6 and 5SL6606-7YA are both 2-pole SENTRON MCBs on the same DIN-rail footprint, but their ratings differ. The 5SL6240-6 is 40 A B-curve; verify the 5SL6606-7YA's rating before substituting without recalculating the circuit protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6240-6","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/5SL6240-6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}