{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6040-7KL","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6040-7KL","canonicalUrl":"https://aoctrl.com/siemens/5SY6040-7KL","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6040-7KL","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6040-7KL miniature circuit breaker, 1-pole+N, C-curve, 40 A rated current, 6 kA breaking capacity at 230 V AC, 18 mm width, DIN rail mount.","salesMarkdown":"Siemens SENTRON 5SY6040-7KL is a 1-pole+N miniature circuit breaker with C-curve tripping characteristic, rated 40 A at 230 V AC and a breaking capacity of 6 kA per EN 60898. It occupies a single 18 mm width unit on standard DIN rail, with a depth of 76 mm and an installation depth of 70 mm — slots into the same panel footprint as any 1P+N SENTRON 5SY6 series breaker. Screw-type terminals accept solid or stranded conductors from 0.75 to 16 mm², with a tightening torque of 2 to 2.5 N·m (17.7 to 22.1 lbf·in). That 16 mm² top end is enough for a 40 A feed conductor without needing a ferrule or pin terminal — just strip and torque. Both top and bottom terminals are non-combined (separate entry per conductor), and the breaker is sealable — useful for installations where the utility or inspector wants to lock the setting after commissioning. Rated for ambient temperatures from -25 to +45 °C during operation, and -40 to +75 °C in storage. Vibration-resistant per IEC 60068-2-6, and mountable in any position, which simplifies panel layout when space is tight. Halogen-free and silicon-free construction, so it won't outgas corrosive compounds in a sealed enclosure near sensitive electronics or in clean-room adjacent panels. The neutral conductor is switched (1P+N), and the supply cord position is any — no fixed line/load orientation on the neutral pole. Touch protection is integrated on the terminals. Mechanical service life is 4 000 switching cycles typical — adequate for a distribution breaker that sees infrequent manual operation, not a daily-switched load controller.","metaTitle":"Siemens 5SY6040-7KL SENTRON MCB, 1P+N C 40 A 6 kA","metaDescription":"Siemens SENTRON 5SY6040-7KL miniature circuit breaker, 1P+N, C-curve, 40 A, 6 kA breaking capacity at 230 V AC. DIN rail mount, 18 mm wide. 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":{"Depth":"76 mm","Solid":"0.75 ... 16 mm²","Width":"18 mm","Height":"90 mm","Minimum":"24 V","Sealable":"Yes","Stranded":"0.75 ... 16 mm²","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"standard rail","During Storage":"-40 ... +75 °C","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","at AC / rated value":"230 V","Overvoltage category":"III","Combined Terminal Top":"No","Energy limiting class":"3","Number of width units":"1","Number of poles / Note":"1P+N","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"No","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","Vibration resistance / acc. to IEC 60068-2-6":"Yes","Tightening torque / with screw-type terminals":"2 ... 2.5 N·m","with single-phase operation / at AC / maximum":"250 V","Product function / neutral conductor switching":"Yes","Mechanical service life (switching cycles) / typical":"4 000","Tightening torque [lbf·in] / with screw-type terminals":"17.7 ... 22.1 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=180549&mlfb=5SY6040-7KL","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6040-7KL/alternatives.json"},"ai":{"faq":[{"question":"What conductor sizes does the 5SY6040-7KL terminal accept?","answer":"Solid or stranded conductors from 0.75 to 16 mm², with a tightening torque of 2 to 2.5 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6040-7KL","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/5SY6040-7KL 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}}