{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FK040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FK040","canonicalUrl":"https://aoctrl.com/schneider/LX4FK040","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FK040","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys LX4FK040, contactor coil, 40 V DC, 45...60 ms opening, 50...60 ms closing.","salesMarkdown":"The LX4FK040 is a replacement contactor coil from the Schneider Electric TeSys range, designed for DC low-consumption control circuits at 40 V DC nominal. It opens in 45 to 60 ms and closes in 50 to 60 ms, with an average inrush resistance of 1.56 Ω and holding resistance of 391.4 Ω at 68 °F (20 °C). The coil has no built-in suppressor module, so you'll need to add external flyback suppression (a diode or RC snubber) across the coil terminals to protect the DC control circuit from inductive kickback. ## Control voltage and operating limits Rated control voltage is 40 V DC, with operational limits of 0.85 to 1.1 Uc (34 to 44 V DC) and dropout between 0.2 and 0.35 Uc (8 to 14 V DC), all at 131 °F (55 °C).","metaTitle":"Schneider Electric LX4FK040 TeSys Contactor Coil, 40 V DC","metaDescription":"Schneider Electric LX4FK040 TeSys contactor coil, 40 V DC control voltage, 45-60 ms opening time. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","title":"LX4FK040","Category":"18401-WORLD SERVICE PARTS(CTR ACCESS)","description":"contactor coil - FK - 40 V DC","Operating time":"45...60 ms opening 50...60 ms closing","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX4FK","Average resistance":"1.56 Ohm inrush 68 °F (20 °C) 391.4 Ohm holding 68 °F (20 °C)","Control circuit type":"DC low consumption","Nbr. of units in pkg.":"1","Product or Component Type":"Contactor coil","[Uc] control circuit voltage":"40 V DC","Control circuit voltage limits":"Drop-out 0.2...0.35 Uc 131 °F (55 °C)) Operational 0.85...1.1 Uc 131 °F (55 °C))","Ambient Air Temperature for Operation":"23...131 °F (-5...55 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6d00ca1bfc379d34a4f294ee8aa5ce15.pdf","sourceUrl":"https://www.se.com/th/en/product/LX4FK040/contactor-coil-fk-40-v-dc/"},"ai":{"faq":[{"question":"What is the control voltage for LX4FK040?","answer":"The control circuit voltage is 40 V DC, with operational limits of 0.85 to 1.1 Uc (34 to 44 V DC) and dropout between 0.2 and 0.35 Uc (8 to 14 V DC) at 55 °C."},{"question":"Does the LX4FK040 coil include a built-in suppressor?","answer":"No. The coil technology is listed as 'Without built-in suppressor module'. You must add external flyback suppression (diode or RC snubber) to protect the DC control circuit."},{"question":"What is the operating temperature range for this coil?","answer":"Ambient air temperature for operation is 23 to 131 °F (-5 to 55 °C)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FK040","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/LX4FK040 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}