{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FH045","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FH045","canonicalUrl":"https://aoctrl.com/schneider/LX4FH045","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FH045","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys contactor coil, LX4FH045, 45 V DC control voltage, DC wide range, without built-in suppressor module.","salesMarkdown":"The Schneider Electric LX4FH045 is a replacement contactor coil from the TeSys range, designed to fit FH-series contactors. It operates on a 45 V DC control circuit with a DC wide-range coil technology, meaning it accepts a broader voltage band than a standard fixed-coil design — the operational limits span 0.85 to 1.1 times Uc at 131 °F (55 °C), and dropout occurs between 0.15 and 0.2 Uc at the same temperature. This gives the coil some tolerance for voltage sag on long control-wire runs without nuisance dropout. The coil draws an inrush resistance of 2.81 Ohm at 68 °F (20 °C) and settles to 611.4 Ohm holding at the same temperature. Closing time is 40 to 50 ms; opening takes 40 to 65 ms. The part carries no built-in suppressor module, so if your application requires flyback suppression (common with PLC or solid-state outputs driving the coil), you will need to add an external diode or RC snubber across the coil terminals. The part belongs to the TeSys range (category 18401-WORLD SERVICE PARTS(CTR ACCESS)), which is Schneider's broad contactor and motor-control family. The LX4FH045 is a service-part coil, not a full contactor — it is intended as a field-replacement component for an existing FH contactor whose coil has failed. ## Deployment context and integration notes This coil mounts onto the FH-series contactor frame, which is a DIN-rail or screw-panel mounted device typical of motor-control centers and industrial control panels. If the panel ambient exceeds 55 °C, the coil's thermal margin narrows and dropout voltage shifts — verify the control voltage stays above 0.85 Uc at the elevated temperature. Because the coil lacks a built-in suppressor, the installer must account for the inductive kickback when de-energizing the coil. A free-wheeling diode across the coil terminals (cathode to positive) is standard practice for DC control circuits driven by a PLC output or relay. Without it, the voltage spike can damage the driving output or cause erratic behavior in nearby electronics. The coil's DC wide-range design helps with voltage tolerance but does not eliminate the need for external suppression.","metaTitle":"Schneider Electric LX4FH045 TeSys Contactor Coil, 45 V DC","metaDescription":"Obsolete Schneider Electric LX4FH045 TeSys contactor coil, 45 V DC control voltage. Sourced to order against RFQ. Operating time 40-50 ms close, 40-65 ms open.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","Category":"18401-WORLD SERVICE PARTS(CTR ACCESS)","Operating time":"40...50 ms closing 40...65 ms opening","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX4FH","Average resistance":"2.81 Ohm inrush 68 °F (20 °C) 611.4 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":"45 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/ef74e72691963caf01517a40c06c870e.pdf","sourceUrl":"https://www.se.com/uk/en/product/LX4FH045/contactor-coil-fh-45-v-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4FH045/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to the LX4FH045?","answer":"No official successor order code is listed in the lifecycle record. To find a current-production replacement, you need to match the coil's physical mounting to the FH contactor frame and its 45 V DC control voltage. A Schneider TeSys distributor can cross-reference the contactor frame size to a current coil part number."},{"question":"What is the LX4FH045's control voltage and operating range?","answer":"The coil is rated for 45 V DC control voltage (Uc). It operates between 0.85 and 1.1 Uc at 131 °F (55 °C) and drops out between 0.15 and 0.2 Uc at the same temperature."},{"question":"Does the LX4FH045 include a built-in suppression diode?","answer":"No. The coil is listed as 'without built-in suppressor module.' External flyback suppression (diode or RC snubber) must be added by the installer when driving the coil from a solid-state output or relay."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FH045","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/LX4FH045 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}}