{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FJ340","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FJ340","canonicalUrl":"https://aoctrl.com/schneider/LX4FJ340","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FJ340","rawCanonicalId":null},"summary":{"shortDescription":"TeSys F, contactor coil, LX4FJ340, 340 V DC, 45-60 ms opening, 10 Mcycles mechanical durability.","salesMarkdown":"The LX4FJ340 is a replacement contactor coil in the TeSys F range, built for 340 V DC control circuits. It's the drop-in magnet coil for TeSys F contactors that use the LX4FJ frame — if your panel has an F-line contactor with a burned or open coil, this is the factory service part. Opening time runs 45 to 60 ms, closing 50 to 60 ms, which is standard for a DC-operated contactor of this frame size. The coil draws 1000 W inrush and settles to 6 W holding, so the control transformer or DC supply needs to handle that inrush peak without dropping out the rest of the circuit. ## Control circuit and voltage limits Rated control voltage is 340 V DC, with an operational range of 0.85 to 1.1 Uc at 131 °F (55 °C). Drop-out happens between 0.2 and 0.35 Uc. This coil has no built-in suppressor module. If your application drives inductive loads near sensitive electronics, you'll want an external flyback diode or RC snubber across the coil terminals. The holding resistance is 33750 Ohm at 68 °F (20 °C), so the steady-state current is about 10 mA — easy on the control transformer once it's picked up. ## What to watch when ordering Ambient temperature range for operation is 23 to 131 °F (-5 to 55 °C). If your panel runs hotter — say near a furnace or in a sun-baked enclosure — you'll need to check the thermal derating for the contactor assembly, not just the coil.","metaTitle":"TeSys LX4FJ340 contactor coil, 340 V DC, LX4FJ","metaDescription":"TeSys F contactor coil LX4FJ340, 340 V DC control circuit, 45-60 ms opening, 10 Mcycles mechanical durability. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","title":"LX4FJ340","Category":"18401-WORLD SERVICE PARTS(CTR ACCESS)","description":"TeSys F - contactor coil - LX4FJ - 340V DC","Operating time":"45...60 ms opening 50...60 ms closing","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX4FJ","Inrush power in W":"1000 W 68 °F (20 °C))","Average resistance":"236 Ohm inrush 68 °F (20 °C) 33750 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":"4435 H","[Uc] control circuit voltage":"340 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e97359ed11cad8a033993516b386711b.pdf","sourceUrl":"https://www.se.com/sg/en/product/LX4FJ340/tesys-f-contactor-coil-lx4fj-340v-dc/"},"ai":{"faq":[{"question":"Does this coil include a built-in surge suppressor?","answer":"No. The coil technology is listed as without built-in suppressor module. An external flyback diode or RC snubber should be added if the circuit requires suppression."},{"question":"What is the mechanical life of this coil?","answer":"Rated for 10 million mechanical cycles, with a maximum operating rate of 2400 cycles per hour at 131 °F (55 °C)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FJ340","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/LX4FJ340 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}}