{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX1FF140","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX1FF140","canonicalUrl":"https://aoctrl.com/schneider/LX1FF140","factsUrl":"https://aoctrl.com/api/mcp/products/LX1FF140","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys F series, LX1FF140 contactor coil, 140 V AC 50 Hz control circuit, 550 VA inrush power, 45 VA hold-in power, 10 Mcycles mechanical durability.","salesMarkdown":"The LX1FF140 is a replacement coil for the TeSys F contactor range, wound for 140 V AC 50 Hz control circuits. It's the part you swap when the original coil opens or shorts — not a whole contactor, just the electromagnetic driver that pulls the main poles in. Rated for 550 VA inrush and 45 VA hold-in at 50 Hz, cos φ 0.3. That inrush figure governs the control transformer sizing — a 100 VA transformer won't cut it if you're energizing this coil through a long cable run. Drop-out voltage is 0.35 to 0.55 Uc (49 to 77 V AC), operational range is 0.85 to 1.1 Uc (119 to 154 V AC) at 55 °C. If your control voltage sags below 119 V under load, the coil may chatter or drop out — common in mills with long 120 V control runs and undersized transformers. Closing time is 23 to 35 ms, opening 5 to 15 ms. That's fast enough for standard motor starting but not for high-speed synchronous transfer switching — the opening delay matters if you're sequencing contactors in a reversing starter. Heat dissipation runs 12 to 16 W at 50 Hz. In a densely packed panel, that's non-trivial — adjacent PLC or relay modules may see a 5 to 10 °C temperature rise if the coil is continuously energized. Leave a slot gap or use a lower-hold coil if the panel runs hot. That's about 40 operations per minute — fine for a conveyor jog sequence, but not for a high-speed pick-and-place application where you'd want a DC-operated or electronic coil. The coil has no built-in suppressor module — you'll need to add a varistor or RC snubber across the coil terminals if the control circuit drives solid-state outputs or a PLC. Without suppression, the inductive kick from the 1.39 H closed-circuit inductance can weld relay contacts or damage triac outputs.","metaTitle":"Schneider LX1FF140 TeSys F Contactor Coil, 140 V AC 50 Hz","metaDescription":"Active-production TeSys F contactor coil, 140 V AC 50 Hz control circuit. 550 VA inrush, 45 VA hold-in. 10 Mcycles mechanical durability. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","title":"LX1FF140","Category":"22341-CONTACTOR,D,K,&F ACCESS","description":"contactor coil - TeSys F - LX1FF - 140 V AC - 50 Hz","Operating time":"23...35 ms closing 5...15 ms opening","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Heat dissipation":"12...16 W 50 Hz","Device short name":"LX1FF","Average resistance":"10.11 Ohm 68 °F (20 °C)","Inrush power in VA":"550 VA 50 Hz cos phi 0.3 (at 68 °F (20 °C))","Control circuit type":"AC 50 Hz","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":"1.39 H","[Uc] control circuit voltage":"140 V AC 50 Hz","Control circuit voltage limits":"Drop-out 0.35...0.55 Uc 50/60 Hz 131 °F (55 °C)) Operational 0.85...1.1 Uc 50/60 Hz 131 °F (55 °C))","Hold-in power consumption in VA":"45 VA 50 Hz cos phi 0.3 (at 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/aebbdeb9611f30ed48d73092e3faaf94.pdf","sourceUrl":"https://www.se.com/th/en/product/LX1FF140/contactor-coil-tesys-f-lx1ff-140-v-ac-50-hz/"},"ai":{"faq":[{"question":"What is the control voltage and frequency for this coil?","answer":"140 V AC at 50 Hz. The operational voltage range is 119 to 154 V AC (0.85 to 1.1 Uc) at 55 °C, and the drop-out range is 49 to 77 V AC (0.35 to 0.55 Uc)."},{"question":"Does this coil include a built-in surge suppressor?","answer":"No. The coil technology is listed as 'without built-in suppressor module'. You must add an external varistor or RC snubber across the coil terminals when driving it with solid-state outputs or PLC transistor outputs."},{"question":"What is the inrush and hold-in power consumption?","answer":"Inrush power is 550 VA at 50 Hz, cos φ 0.3. Hold-in power is 45 VA at 50 Hz, cos φ 0.3. The inrush figure is critical for sizing the control transformer."},{"question":"What contactor range does this coil fit?","answer":"It is part of the TeSys F range (device short name LX1FF). It is a replacement coil for TeSys F contactors that use this form factor and voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX1FF140","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/LX1FF140 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}