{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX4FJ400","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX4FJ400","canonicalUrl":"https://aoctrl.com/schneider/LX4FJ400","factsUrl":"https://aoctrl.com/api/mcp/products/LX4FJ400","rawCanonicalId":null},"summary":{"shortDescription":"TeSys F, contactor coil, LX4FJ400, 400 V DC, 45-60 ms opening, 50-60 ms closing, 10 Mcycles mechanical durability.","salesMarkdown":"The LX4FJ400 is a replacement coil for the TeSys F contactor range, designed for a 400 V DC control circuit. It's a DC low-consumption coil without a built-in suppressor module — meaning you'll need to add an external flyback diode or RC snubber across the coil terminals to protect the control circuit from the inductive kick when de-energizing. Opening time runs 45 to 60 ms, closing 50 to 60 ms. The coil draws 1000 W inrush at 20 °C, then settles to 6 W holding. Average resistance is 236 Ω during inrush and 33750 Ω holding. The closed-circuit inductance is 4435 H — a high value that confirms the coil is designed for a DC supply with significant stored energy. The control voltage limits are: dropout at 0.2 to 0.35 Uc (80 to 140 V DC), operational at 0.85 to 1.1 Uc (340 to 440 V DC) at 55 °C. The absence of a built-in suppressor module is a critical detail for panel builders. Without external suppression, the coil's high inductance (4435 H) will generate a voltage spike when de-energized that can damage PLC outputs or relay contacts driving it. A standard flyback diode across the coil terminals, cathode to positive, is the minimum protection — verify polarity before wiring. Mechanical durability of 10 million cycles suits applications with frequent switching — think conveyor diverters, packaging machine indexing, or valve actuation in cyclic processes. The 2400 cycles/hour maximum at 55 °C means one operation every 1.5 seconds sustained, which is fast for a contactor coil but within spec for high-speed pick-and-place lines.","metaTitle":"TeSys LX4FJ400 Contactor Coil, 400 V DC, Obsolete","metaDescription":"TeSys F LX4FJ400 contactor coil, 400 V DC control circuit, 45-60 ms opening. Obsolete — sourced to order against RFQ. Check fit for your BOM line.","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":"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":"400 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/25d9702eb73ec935d881e5916ee49f68.pdf","sourceUrl":"https://www.se.com/sg/en/product/LX4FJ400/tesys-f-contactor-coil-lx4fj-400v-dc/","alternativesUrl":"https://aoctrl.com/api/mcp/products/LX4FJ400/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to LX4FJ400?","answer":"No official successor order code is provided. A parametric substitute would be another 400 V DC coil from the TeSys F range with the same mounting footprint and electrical ratings (inrush 1000 W, holding 6 W, opening time 45-60 ms). Pin-for-pin equivalence must be verified against the specific contactor frame — check the coil terminal arrangement and mechanical interlock compatibility before substituting."},{"question":"What is the TeSys range for this part?","answer":"The LX4FJ400 belongs to the TeSys F range of contactors and accessories. TeSys F is a modular contactor series designed for motor switching and general load management in industrial control panels."},{"question":"What is the category 18401-WORLD SERVICE PARTS?","answer":"This is a manufacturer internal category for service and replacement parts — components carried to support installed base equipment after the main production run ends. It indicates the part was stocked as a field-replacement spare, not a standard catalog item."},{"question":"What compliance documentation is available for LX4FJ400?","answer":"The evidence does not list RoHS, REACH, UL, or IEC certifications for this specific order code. As an obsolete service part, original compliance documentation may be limited. Request the manufacturer's declaration or certificate of conformance with your RFQ if regulatory traceability is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX4FJ400","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/LX4FJ400 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}}