{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FL400","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FL400","canonicalUrl":"https://aoctrl.com/schneider/LX4FL400","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FL400","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys FK contactor coil, LX4FL400, 400 V DC control circuit, 40-50 ms opening / 60-70 ms closing, without built-in suppressor module.","salesMarkdown":"It is a replacement coil for TeSys contactors that use this FK coil platform, not a standalone contactor. The coil operates with an opening time of 40 to 50 ms and a closing time of 60 to 70 ms. It has no built-in suppressor module, so external suppression (e.g., a free-wheeling diode) must be added across the coil when driven by a DC supply to protect the control circuit from inductive kickback. Control voltage limits are specified: dropout occurs at 0.2 to 0.35 Uc at 131 °F (55 °C), and operational pickup requires 0.85 to 1.1 Uc at the same temperature. Ambient operating temperature range is 23 to 131 °F (-5 to 55 °C). ## Integration Note — Panel Fit and Wiring This coil mounts onto the TeSys FK contactor frame. The 400 V DC control voltage is non-standard for many panel designs that run 24 V DC control — verify your control transformer and DC supply before specifying. The coil's DC low-consumption design draws less inrush than an AC coil of equivalent rating, which simplifies the DC supply sizing. Because the coil lacks a built-in suppressor, the panel builder must add a flyback diode (e.g., 1N4007 or similar rated for the coil current) across the coil terminals, cathode to positive. This prevents the voltage spike on de-energization from damaging PLC output cards or relay contacts driving the coil.","metaTitle":"Schneider LX4FL400 TeSys Contactor Coil, 400 V DC, Obsolete","metaDescription":"Schneider Electric LX4FL400 TeSys FK contactor coil, 400 V DC control voltage. Obsolete status — sourced to order against RFQ. 40-50 ms opening, 60-70 ms closing.","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":"40...50 ms opening 60...70 ms closing","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX4FL","Control circuit type":"DC low consumption","Nbr. of units in pkg.":"1","Product or Component Type":"Contactor coil","[Uc] control circuit voltage":"400 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d365d902b33221ca8b133acaae680df0.pdf","sourceUrl":"https://www.se.com/vn/en/product/LX4FL400/contactor-coil-fk-400-v-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4FL400/alternatives.json"},"ai":{"faq":[{"question":"What is the control voltage for this coil?","answer":"The LX4FL400 is a 400 V DC control coil. It operates on a DC low-consumption control circuit at 400 V nominal."},{"question":"Does this coil include a built-in suppressor?","answer":"No. The coil is specified as 'Without built-in suppressor module'. An external free-wheeling diode must be added across the coil for DC operation."},{"question":"What are the opening and closing times?","answer":"Opening time is 40 to 50 ms; closing time is 60 to 70 ms."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FL400","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/LX4FL400 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}}