{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FK045","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FK045","canonicalUrl":"https://aoctrl.com/schneider/LX4FK045","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FK045","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys range, LX4FK045 contactor coil, 45 V DC, 45-60 ms opening, 50-60 ms closing.","salesMarkdown":"The LX4FK045 is a replacement contactor coil from the TeSys range, designed for DC low-consumption control circuits at 45 V DC. It opens in 45-60 ms and closes in 50-60 ms, which governs how fast the contactor responds to a control signal — relevant for sequencing or interlock timing in a panel. ## Coil characteristics and fit The coil draws an inrush resistance of 1.9 Ohm at 68 °F (20 °C) and a holding resistance of 491.3 Ohm at the same temperature — the inrush-to-holding ratio tells you the coil's power supply must handle the initial surge, then settle to a lower steady-state draw. It ships without a built-in suppressor module, so if your application requires flyback suppression (common on DC coils near PLC outputs or sensitive electronics), you add an external diode or RC snubber across the coil terminals. Control voltage limits are specified at 131 °F (55 °C): dropout occurs at 0.2-0.35 Uc (9-15.75 V DC), and the operational range is 0.85-1.1 Uc (38.25-49.5 V DC). The dropout margin matters for brownout ride-through — the contactor stays pulled in down to about 38 V, but drops out reliably below 16 V, preventing partial engagement that would weld main contacts. ## Operating environment Rated for ambient air temperatures from 23 to 131 °F (-5 to 55 °C). The coil is a DC low-consumption type, which runs cooler than an equivalent AC coil — relevant if the contactor is in a crowded enclosure where heat buildup is a concern.","metaTitle":"TeSys LX4FK045 Contactor Coil, 45 V DC, Active","metaDescription":"TeSys LX4FK045 replacement contactor coil, 45 V DC control voltage, 45-60 ms operating time, active production. Order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","title":"LX4FK045","Category":"18401-WORLD SERVICE PARTS(CTR ACCESS)","description":"contactor coil - FK - 45 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":"1.9 Ohm inrush 68 °F (20 °C) 491.3 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":"45 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/a73fa61cd8cf1bb1b586330341d9506b.pdf","sourceUrl":"https://www.se.com/us/en/product/LX4FK045/contactor-coil-fk-45-v-dc/"},"ai":{"faq":[{"question":"What is the control voltage for LX4FK045?","answer":"The control circuit voltage is 45 V DC, with an operational range of 0.85-1.1 Uc (38.25-49.5 V DC) at 131 °F (55 °C). Dropout occurs at 0.2-0.35 Uc (9-15.75 V DC)."},{"question":"Does the LX4FK045 include a built-in suppressor module?","answer":"No, the coil technology is listed as 'without built-in suppressor module'. For DC switching, an external flyback diode or RC snubber should be added to protect control circuits from voltage spikes."},{"question":"What is the operating temperature range for this coil?","answer":"The 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/LX4FK045","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/LX4FK045 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}}