{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3540-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3540-7","canonicalUrl":"https://aoctrl.com/siemens/5SL3540-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3540-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL3 series, miniature circuit breaker, 5SL3540-7, 40 A, C tripping characteristic, 2-pole (1P+N), 4.5 kA breaking capacity, 230 V AC.","salesMarkdown":"The Siemens 5SL3540-7 is a SENTRON 5SL3 miniature circuit breaker rated 40 A with a C tripping characteristic, 2-pole (1P+N) configuration, and a 4.5 kA breaking capacity per both EN 60898 and IEC 60947-2. Rated 230 V AC supply voltage, with a maximum DC rating of 60 V. Terminal accepts solid or stranded conductors from 0.75 to 25 mm²; tightening torque is 2.5 to 3 N·m on the screw terminals. IP20 with connected conductors — that's touch-protected terminals but not sealed against dust ingress, so it lives inside a distribution board, not in a washdown zone. The 40 A C-curve is the headline fit check: if your circuit is protecting a 40 A resistive or moderate-inrush load at 230 V AC single-phase, this breaker matches. The 1P+N pole configuration switches both phase and neutral — the neutral pole is switched but not protected, which is standard for single-phase final circuits in many European distribution boards. Energy limiting class 3 means it restricts let-through energy well, reducing stress on downstream equipment during a fault.","metaTitle":"Siemens 5SL3540-7 SENTRON MCB, 40A C-Curve 2-Pole 4.5kA","metaDescription":"Siemens 5SL3540-7 SENTRON miniature circuit breaker, 40 A, C characteristic, 2-pole 1P+N, 4.5 kA breaking capacity per EN 60898. Current lifecycle stage. Sourced to order against R","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 25 mm²","Width":"36 mm","title":"5SL3540-7","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 25 mm²","Rated Value":"50 Hz","description":"Miniature circuit breaker 230 V 4.5 kA, 1+N-pole, C, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","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":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SL3","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"4.5 kA","acc. to IEC 60947-2 / rated value":"4.5 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"230 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Product function / neutral conductor switching":"Yes","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/85341568e2b3786a777d902c9a942be5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=296030&mlfb=5SL3540-7"},"ai":{"faq":[{"question":"What is 5SL3540-7's depth?","answer":"The 5SL3540-7 has a depth of 76 mm and an installation depth of 70 mm, which is the dimension you check against enclosure depth and gland-plate clearance."},{"question":"What conductor sizes does 5SL3540-7 accept?","answer":"The screw terminals accept solid or stranded conductors from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3540-7","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/5SL3540-7 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}}