{"product_id":"liftmaster-k20-1050b-1rsx","title":"LiftMaster K20-1050B-1RSX Replacement AC Gate Motor — 1\/2 HP","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster K20-1050B-1RSX is a half-horsepower AC replacement motor identified in documented LiftMaster gate-operator repair drawings. It is a service component for the matching motor and drive arrangement, including the documented CSW200501U swing and SL3000501U slide applications. Select it by the existing motor label and the exact operator revision, not simply by the CSW200 or SL3000 family name. Those families include different horsepower configurations, and a shared manual or similar motor appearance does not make this half-horsepower motor an approved replacement for a one-horsepower unit.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCSW200501U\u003c\/td\u003e\n\u003ctd\u003eDocumented half-horsepower swing-operator application; match the installed motor and revision.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSL3000501U\u003c\/td\u003e\n\u003ctd\u003eDocumented half-horsepower slide-operator application; verify the exact service drawing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOne-horsepower CSW200 \/ SL3000 variants\u003c\/td\u003e\n\u003ctd\u003eDo not infer compatibility from a shared family manual or duplicated diagram reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLater UL revisions\u003c\/td\u003e\n\u003ctd\u003eConfirm the model-specific replacement reference before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eK20-1050B-1RL and DC backup motors\u003c\/td\u003e\n\u003ctd\u003eDifferent service references; similar numbering or shared equipment branding does not establish interchangeability.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eMatch the Motor and Diagnose the Complete Drive\u003c\/h2\u003e\u003cp\u003eRecord the full operator model and the label on the installed motor, including its electrical information. Compare the mounting, shaft connection and associated drive components with the applicable repair drawing. A generic half-horsepower rating is only one selection factor; it does not verify voltage, rotation, mounting or the correct connection arrangement for the equipment being repaired.\u003c\/p\u003e\u003cp\u003eHave the technician evaluate the power supply, capacitor where fitted, wiring and mechanical drive before replacing the motor. A motor that hums, overheats or fails to start can be responding to another fault. Check that the gate moves freely and that the gearbox, pulley or other connected components are serviceable. A new motor will not correct a binding gate or damaged transmission.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eK20-1050B-1RSX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor type\u003c\/td\u003e\n\u003ctd\u003eAC replacement motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePublished power\u003c\/td\u003e\n\u003ctd\u003e1\/2 horsepower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented examples\u003c\/td\u003e\n\u003ctd\u003eCSW200501U and SL3000501U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired verification\u003c\/td\u003e\n\u003ctd\u003eMotor label, operator revision and approved drive arrangement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage scope\u003c\/td\u003e\n\u003ctd\u003eMotor service item; confirm current supplied components\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRecord the full operator model, production revision and existing motor label.\u003c\/li\u003e\n\u003cli\u003eConfirm the required motor is the documented half-horsepower K20-1050B-1RSX.\u003c\/li\u003e\n\u003cli\u003eCheck the supply, starting components and mechanical drive before ordering.\u003c\/li\u003e\n\u003cli\u003eVerify the current motor package and any separately needed mounting or drive hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThis listing identifies the replacement motor. A pulley, belt, capacitor, brake, gearbox, wiring harness or complete operator is not promised as included. Confirm the current supplier package against the repair requirements. A parts illustration may show the motor beside these components without including them in the motor carton. Retain only hardware that the service instructions permit to be reused and that the technician finds serviceable.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING: Motor service exposes hazardous electrical components and a drive that can move the gate unexpectedly. Use a qualified gate-systems technician and qualified electrical personnel as required.\u003c\/li\u003e\n\u003cli\u003eIsolate all applicable power and secure the gate before disturbing the drive. Capacitors may retain energy after power is disconnected; follow the manufacturer’s service procedure.\u003c\/li\u003e\n\u003cli\u003eDo not substitute an unverified voltage, change drive ratios or increase force to overcome binding. Never bypass required entrapment protection.\u003c\/li\u003e\n\u003cli\u003eRestore guards, verify the prescribed motor and drive operation, and test travel, reversal and all required safety devices before normal use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmrrul-monitored-retro-reflective-photo-eye\"\u003eLMRRUL monitored photo eye\u003c\/a\u003e — a separate protection option only where the exact operator and control revision approve it; not a universal legacy retrofit.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmwekitu-monitored-wireless-edge-kit-for-gate-operators\"\u003eLMWEKITU monitored wireless edge kit\u003c\/a\u003e — a separate edge communication system for approved controls and resistive edges; not a replacement for this mechanical or electrical service part.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs this a one-horsepower replacement motor?\u003c\/h3\u003e\u003cp\u003eNo. The published identification is one-half horsepower. Do not rely on a shared family manual to infer one-horsepower compatibility.\u003c\/p\u003e\u003ch3\u003eCan any half-horsepower motor replace it?\u003c\/h3\u003e\u003cp\u003eNo. The approved part reference, electrical requirements, mounting and drive connection must all match.\u003c\/p\u003e\u003ch3\u003eDoes the motor include the capacitor or gearbox?\u003c\/h3\u003e\u003cp\u003eNeither is promised as included. Confirm the current carton and order separately required components.\u003c\/p\u003e\u003ch3\u003eWill replacing the motor fix a gate that binds?\u003c\/h3\u003e\u003cp\u003eNo. Diagnose and correct the mechanical problem before returning the drive to operation.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.\u003c\/p\u003e","brand":"Controlled products","offers":[{"title":"Default Title","offer_id":60655783739678,"sku":"K20-1050B-1RSX","price":580.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/k20-1050b-1rsx.jpg?v=1793139971","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-k20-1050b-1rsx","provider":"garage-doorparts.com","version":"1.0","type":"link"}