{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FF100","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FF100","canonicalUrl":"https://aoctrl.com/schneider/LX4FF100","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FF100","rawCanonicalId":null},"summary":{"shortDescription":"TeSys F contactor coil, LX4FF100, 125 V DC wide range, operating time 30...40 ms closing 30...50 ms opening.","salesMarkdown":"The LX4FF100 is a replacement contactor coil for the TeSys F series, rated 125 V DC wide range control circuit. It closes in 30...40 ms and opens in 30...50 ms — fast enough for standard motor starting duty, not a high-speed switching coil. The wide-range control circuit accepts 0.7...1.25 Uc for pickup and drops out between 0.2...0.45 Uc, which gives a clean margin against brownout conditions without a separate undervoltage release. ## What else matters for fit The coil draws 560 W inrush at 20 °C and holds at 4.5 W, with an average resistance of 16.9 Ω inrush and 2340 Ω holding. No built-in suppressor module — you will need an external free-wheel diode or varistor across the coil if the control circuit requires it. Ambient temperature range covers -55 °C to 70 °C, which suits most indoor panel environments but not extended outdoor exposure without a heater.","metaTitle":"TeSys LX4FF100 contactor coil, 125 V DC wide range","metaDescription":"Obsolete TeSys F contactor coil LX4FF100, 125 V DC wide range. Sourced to order. Operating time 30-40 ms close, 30-50 ms open. RFQ for availability.","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":"16.9 Ohm inrush 68 °F (20 °C) 2340 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":"149 H","[Uc] control circuit voltage":"125 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/cb565b96444a56b33db4b08e6eb02a6d.pdf","sourceUrl":"https://www.se.com/vn/en/product/LX4FF100/tesys-f-contactor-coil-lx4ff-125-v-dc-wide-range/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4FF100/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to LX4FF100?","answer":"No official direct replacement is listed by the manufacturer. For a close functional match, you would need to cross-reference the TeSys F coil family by voltage and mechanical footprint — this is a sourcing inquiry best handled via an RFQ with the specific base contactor model."},{"question":"What is the control voltage and operating range?","answer":"Rated 125 V DC wide range. Pickup voltage is 0.7 to 1.25 times Uc at 70 °C; dropout is 0.2 to 0.45 times Uc at 70 °C. This provides a reliable hold-in margin down to roughly 87.5 V DC and dropout below about 56 V DC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FF100","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/LX4FF100 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}}