{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FG055","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FG055","canonicalUrl":"https://aoctrl.com/schneider/LX4FG055","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FG055","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys LX4FG055, contactor coil, 55 V DC, DC wide range, 30...40 ms closing, obsolete.","salesMarkdown":"The Schneider Electric TeSys LX4FG055 is a replacement contactor coil designed for the FG series of contactors. It operates on a 55 V DC control circuit, drawing an inrush current through a 3.87 Ohm coil resistance at 68 °F (20 °C) before settling to a holding current through the 904.1 Ohm holding resistance at the same temperature. The coil lacks a built-in suppressor module, so external flyback diode or RC snubber protection is required on the control circuit to prevent voltage spikes during de-energization. ## Electrical characteristics and operating envelope The coil's operating time is specified at 30...40 ms for closing and 30...50 ms for opening. The control circuit is classified as DC wide range, with operational voltage limits of 0.85...1.1 Uc (46.75...60.5 V DC) at 131 °F (55 °C) and a drop-out threshold of 0.15...0.2 Uc (8.25...11 V DC) at the same temperature. Ambient air temperature for operation is rated from 23...131 °F (-5...55 °C). These limits define the reliable pick-up and drop-out envelope; operation outside these ranges risks partial stroke or failure to hold. This coil mounts directly onto the FG series contactor armature. The DC wide-range control circuit requires clean DC supply; verify the power supply can deliver the inrush current without voltage sag below the 0.85 Uc pick-up threshold. Because the coil has no built-in suppressor, the panel builder must install a freewheeling diode across the coil terminals, polarity-observed, to protect the control circuit PLC output or relay contact from inductive kickback.","metaTitle":"Schneider TeSys LX4FG055 Contactor Coil, 55 V DC, Obsolete","metaDescription":"Schneider Electric TeSys LX4FG055 contactor coil, 55 V DC control voltage, 30-40 ms closing time. Obsolete status; sourced to order against RFQ.","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":"LX4FG","Average resistance":"3.87 Ohm inrush 68 °F (20 °C) 904.1 Ohm holding 68 °F (20 °C)","Control circuit type":"DC wide range","Nbr. of units in pkg.":"1","Product or Component Type":"Contactor coil","[Uc] control circuit voltage":"55 V DC","Control circuit voltage limits":"Operational 0.85...1.1 Uc 131 °F (55 °C)) Drop-out 0.15...0.2 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/515c5f80f4b7d62428fe58752b0c9d21.pdf","sourceUrl":"https://www.se.com/vn/en/product/LX4FG055/contactor-coil-fg-55-v-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4FG055/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to the LX4FG055?","answer":"No official successor order code is listed. A current-production TeSys coil with 55 V DC control voltage and matching mechanical interface for the FG contactor frame is the closest functional alternative, but mechanical fit must be verified against the specific contactor model. The obsolete LX4FG055 is the only exact replacement for itself."},{"question":"What is the control voltage range for reliable operation?","answer":"The coil is rated for 55 V DC control voltage (Uc). Operational pick-up range is 0.85...1.1 Uc (46.75...60.5 V DC) at 131 °F (55 °C). Drop-out occurs between 0.15...0.2 Uc (8.25...11 V DC) at the same temperature."},{"question":"Does the LX4FG055 include a built-in suppression module?","answer":"No. The coil technology is specified as 'Without built-in suppressor module.' An external flyback diode or RC snubber must be added across the coil terminals for inductive load suppression."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FG055","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/LX4FG055 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}}