{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FF040","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FF040","canonicalUrl":"https://aoctrl.com/schneider/LX4FF040","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FF040","rawCanonicalId":null},"summary":{"shortDescription":"TeSys F, contactor coil, LX4FF040, 48 V DC wide range, 30...40 ms closing, 30...50 ms opening, without built-in suppressor module.","salesMarkdown":"The LX4FF040 is a replacement contactor coil from the TeSys F range, designed for 48 V DC wide-range control circuits. It is the service-part coil that mates with TeSys F contactor frames — not a standalone contactor, but the interchangeable coil assembly you swap when the original coil fails or you need to change the control voltage on an existing contactor. Key operating parameters: closing time 30...40 ms, opening time 30...50 ms. Coil inrush power is 560 W at 68 °F (20 °C), dropping to 4.5 W holding power at the same temperature. The average resistance measures 2.86 Ohm inrush and 391 Ohm holding at 68 °F (20 °C). The coil carries an inductance of 27 H when closed. Control voltage limits at 158 °F (70 °C): operational range 0.7...1.25 Uc, drop-out range 0.2...0.45 Uc. The coil has no built-in suppressor module. If your application drives the coil from a PLC output or solid-state relay, you will need an external flyback diode or RC snubber across the coil terminals to protect the switching device from the inductive kickback. The 27 H inductance stores significant energy when energized. ## What replaces it — the cross-reference question The manufacturer does not list a direct drop-in successor order code for the LX4FF040 in the lifecycle record. Within the TeSys F family, the current-production coil range uses a different part-numbering scheme and may have different mounting or electrical characteristics. A pin-for-pin equivalent is not guaranteed without checking the specific contactor frame and coil mounting interface.","metaTitle":"TeSys LX4FF040 Contactor Coil, 48 V DC, Obsolete","metaDescription":"TeSys LX4FF040 contactor coil, 48 V DC wide range, 30-40 ms closing. Obsolete status — sourced to order against RFQ. Part of the TeSys F series.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","Category":"18401-WORLD SERVICE PARTS(CTR ACCESS)","Operating time":"30...40 ms closing 30...50 ms opening","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX4FF","Inrush power in W":"560 W 68 °F (20 °C))","Average resistance":"2.86 Ohm inrush 68 °F (20 °C) 391 Ohm holding 68 °F (20 °C)","Control circuit type":"DC wide range","Mechanical durability":"1 Mcycles","Nbr. of units in pkg.":"1","Maximum operating rate":"60 cyc/h 158 °F (70 °C)","Product or Component Type":"Contactor coil","Inductance of closed circuit":"27 H","[Uc] control circuit voltage":"48 V DC","Control circuit voltage limits":"Operational 0.7...1.25 Uc 158 °F (70 °C)) Drop-out 0.2...0.45 Uc 158 °F (70 °C))","Hold-in power consumption in W":"4.5 W 68 °F (20 °C)","Ambient Air Temperature for Operation":"-67...158 °F (-55...70 °C)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/34c44240d6c48237e4a9760dc1dba70a.pdf","sourceUrl":"https://www.se.com/sg/en/product/LX4FF040/tesys-f-contactor-coil-lx4ff-48-v-dc-wide-range/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4FF040/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to the LX4FF040?","answer":"The manufacturer does not list a direct drop-in successor order code. A current-production TeSys F coil with the same 48 V DC wide-range specification may fit, but the mechanical interface (coil retention and terminal layout) must be verified against the specific contactor frame. There is no guaranteed pin-for-pin equivalent without checking the frame size."},{"question":"What are the key electrical ratings for the LX4FF040 coil?","answer":"Control voltage is 48 V DC wide range. Inrush power 560 W, holding power 4.5 W at 68 °F (20 °C). Coil resistance: 2.86 Ohm inrush, 391 Ohm holding. Inductance 27 H when closed. Operating time 30...40 ms closing, 30...50 ms opening. No built-in suppressor module."},{"question":"How do I source the LX4FF040 given its obsolete status?","answer":"This part is sourced to order against an RFQ through the independent surplus and broker channel. There is no factory stock or standard lead time. Submit an RFQ for current availability and pricing — we quote from verified independent inventory."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FF040","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/LX4FF040 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}}