{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LX1FK850","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"LX1FK850","canonicalUrl":"https://aoctrl.com/schneider/LX1FK850","factsUrl":"https://aoctrl.com/api/mcp/products/LX1FK850","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric TeSys LX1F series, LX1FK850, contactor coil, 850 V AC 50/60 Hz, 10 Mcycles mechanical durability.","salesMarkdown":"The Schneider TeSys LX1FK850 is a replacement coil for LX1F contactors, rated for 850 V AC 50/60 Hz control circuits. That 850 V coil voltage is unusual — most panel builders see 110 V, 230 V, or 400 V coils. This one is built for installations where the control transformer steps up to 850 V, common in some heavy industrial or utility substation schemes where long control cable runs need a higher voltage to overcome voltage drop. It belongs to the TeSys range, Schneider's mainstream contactor and motor-control family. The coil is the replaceable actuator that pulls the contactor in; when a contactor fails to pick or drops out under vibration, this is the part you swap up-tower or in the panel without replacing the whole contactor. ## Coil electrical characteristics — the numbers that matter for fit The coil draws 447 ohms inrush at 68 °F (20 °C) and 10637 ohms holding at the same temperature. That 24:1 ratio between inrush and holding resistance is typical for AC-operated contactor coils — the high inrush current slams the armature closed, then the holding current drops to a fraction of that. If you are sizing a control transformer for a panel with several LX1FK850 coils, the inrush load adds up fast; the holding load is negligible by comparison. There is no built-in suppressor module. That means the coil generates a back-EMF spike on de-energization that can arc across auxiliary contacts or couple noise into nearby electronics. For a wind-turbine pitch-control cabinet or a PLC-driven panel, you will want an external RC snubber or varistor across the coil terminals. The LX1F contactor base has provisions for plug-in suppressor modules from the TeSys accessory range. Operating voltage limits: the coil picks at 0.85 to 1.1 times Uc (722 to 935 V AC) and drops out between 0.3 and 0.5 times Uc (255 to 425 V AC), all at 131 °F (55 °C). The wide dropout margin means the contactor stays held during a brief sag but releases cleanly on a deep brownout. That 55 °C ambient ceiling matches the inside of a NEMA 4X enclosure in direct sun or a nacelle control cabinet in summer. ## Mechanical endurance and operating rate Rated for 10 million mechanical cycles. That is a high-durability figure for a contactor coil — it outlasts most contactor main contacts by a factor of 5 to 10. In practice, the coil will survive the life of the contactor in a cycling application like a conveyor jog station or a wind-turbine yaw drive. The maximum operating rate is 2400 cycles per hour at 131 °F (55 °C), which works out to one pick-and-drop every 1.5 seconds. That covers high-speed packaging lines and repetitive machine-tool cycles. Opening time is 100 to 170 ms; closing time is 40 to 75 ms. The closing time is fast enough for most motor-starting sequences, but the opening time is relatively slow — if you need arc-quenching speed for a short-circuit protection scheme, a contactor alone is not the right device; that is what a circuit breaker or fuse does. Because it is active and part of the widely stocked TeSys range, lead times are typically short for a production item. The LX1FK850 is the specific order code for the 850 V AC coil variant; verify that your contactor frame size accepts the LX1F coil family before ordering.","metaTitle":"Schneider TeSys LX1FK850 Contactor Coil, 850 V AC 50/60 Hz","metaDescription":"Schneider TeSys LX1FK850 contactor coil, 850 V AC 50/60 Hz. Active lifecycle. No built-in suppressor. 10 Mcycles mechanical. 2400 cyc/h at 55°C. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactor & Starter Coils"],"specifications":{"Range":"TeSys","title":"LX1FK850","Category":"22341-CONTACTOR,D,K,&F ACCESS","description":"contactor coil - LX1F - 850 V AC - 50/60 Hz","Operating time":"100...170 ms opening 40...75 ms closing","Coil technology":"Without built-in suppressor module","lifecycle_stage":"current","Device short name":"LX1FK","Average resistance":"447 Ohm inrush 68 °F (20 °C) 10637 Ohm holding 68 °F (20 °C)","Control circuit type":"AC 50/60 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","[Uc] control circuit voltage":"850 V AC 50/60 Hz","Control circuit voltage limits":"Operational 0.85...1.1 Uc 50/60 Hz 131 °F (55 °C)) Drop-out 0.3...0.5 Uc 50/60 Hz 131 °F (55 °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/a7d20f0a2e58b74b1e8a820d7441f0e4.pdf","sourceUrl":"https://www.se.com/sg/en/product/LX1FK850/contactor-coil-lx1f-850-v-ac-50-60-hz/"},"ai":{"faq":[{"question":"What is the closest alternative to the LX1FK850 in the TeSys coil family?","answer":"The TeSys LX1F coil family includes multiple voltage variants (e.g., 110 V, 230 V, 400 V, 480 V, 575 V AC). The LX1FK850 is the specific 850 V AC 50/60 Hz variant. If your control voltage is different, choose the LX1F coil with the matching Uc rating. All LX1F coils share the same mechanical footprint and mounting, so swapping voltage is a matter of selecting the right order code, not modifying the contactor."},{"question":"What is the TeSys range for this coil?","answer":"It belongs to the Schneider TeSys range, the company's primary family of contactors, motor starters, and control accessories for industrial and commercial applications."},{"question":"What compliance documentation does Schneider provide for the LX1FK850?","answer":"As a standard TeSys catalog item, Schneider provides the usual compliance documentation: CE marking (low-voltage directive), RoHS, and REACH declarations. For specific UL or IEC certification details, refer to the product datasheet or contact the distributor with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/LX1FK850","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/LX1FK850 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}}