{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FK250","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FK250","canonicalUrl":"https://aoctrl.com/schneider/LX4FK250","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FK250","rawCanonicalId":null},"summary":{"shortDescription":"TeSys F, contactor coil, LX4FK250, 250 V DC control voltage, 10 Mcycles mechanical durability, obsolete.","salesMarkdown":"The LX4FK250 is a replacement coil for TeSys F contactors, rated for 250 V DC control circuits. It's a DC low-consumption design — inrush draws 1100 W at 20 °C, holding settles to 6 W, with a holding resistance of 9650 Ω once the armature seals. The coil has no built-in suppressor module, so you'll need to add a free-wheeling diode or varistor across the terminals if the driving circuit doesn't already provide suppression. Opening time runs 45–60 ms, closing 50–60 ms. ## Control Voltage Limits — What Stays and What Drops The coil operates reliably between 0.85 and 1.1 Uc at 55 °C — that's 212.5 to 275 V DC. Drop-out happens between 0.2 and 0.35 Uc (50 to 87.5 V DC). If your control supply sags during a brownout, the contactor will drop out before the motor starter loses its hold-in, which is the expected behavior for a fail-safe circuit. The closed-circuit inductance of 1350 H means the coil stores significant energy — another reason to fit that external suppression diode. ## Temperature and Duty Cycle Constraints No derating curve is published in the basic spec, but the 2400 cycles/hour maximum is stated at the top of that range. If your panel runs hotter than 55 °C, this coil isn't the right fit — look for a higher-temperature variant in the TeSys range or add forced ventilation.","metaTitle":"TeSys LX4FK250 Contactor Coil, 250 V DC, Obsolete","metaDescription":"TeSys F LX4FK250 contactor coil, 250 V DC control voltage, 10 Mcycles mechanical durability. 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":"22341-CONTACTOR,D,K,&F ACCESS","Operating time":"45...60 ms opening 50...60 ms closing","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX4FK","Inrush power in W":"1100 W 68 °F (20 °C))","Average resistance":"56 Ohm inrush 68 °F (20 °C) 9650 Ohm holding 68 °F (20 °C)","Control circuit type":"DC low consumption","Mechanical durability":"10 Mcycles","Nbr. of units in pkg.":"1","Maximum operating rate":"2400 cyc/h 131 °F (55 °C)","Product or Component Type":"Contactor coil","Inductance of closed circuit":"1350 H","[Uc] control circuit voltage":"250 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))","Hold-in power consumption in W":"6 W 68 °F (20 °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/702232f9892597a01f447dd1c550c6c3.pdf","sourceUrl":"https://www.se.com/th/en/product/LX4FK250/tesys-f-contactor-coil-lx4fk-250-v-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4FK250/alternatives.json"},"ai":{"faq":[{"question":"What is the control voltage for this coil?","answer":"250 V DC. The operational range is 0.85 to 1.1 Uc (212.5 to 275 V DC) at 55 °C. Drop-out occurs between 0.2 and 0.35 Uc (50 to 87.5 V DC)."},{"question":"Does this coil include a built-in suppressor?","answer":"No. The coil technology is listed as 'without built-in suppressor module.' You must add external suppression (diode or varistor) to protect the driving circuit from the inductive kick."},{"question":"What is the mechanical durability of the LX4FK250?","answer":"10 million cycles. Maximum operating rate is 2400 cycles per hour at 55 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FK250","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/LX4FK250 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}}