{"product_id":"10pcs-kw12-3-micro-roller-lever-limit-switch-pcb","title":"10Pcs KW12-3 Micro Roller Lever Limit Switch PCB Mount","description":"\n\u003ch2\u003e10Pcs KW12-3 Micro Roller Lever Arm Limit Switch — PCB Mount\u003c\/h2\u003e\n\u003cp\u003eGet reliable, precise circuit switching with this pack of 10 KW12-3 Micro Roller Lever Limit Switches. Designed for PCB mounting, these compact snap-action switches deliver fast, consistent make\/break performance across a wide range of electronic and mechanical applications. Whether you're building automation systems, repairing appliances, or prototyping circuits, this value pack has you covered.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e KW12-3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Voltage:\u003c\/strong\u003e AC 125V – 250V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 5A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -40°C to 70°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 20 × 10 × 6 mm (L × W × H)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e PCB (Circuit Board) Terminals\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActuator:\u003c\/strong\u003e Roller Lever Arm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic housing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEU LVD Voltage:\u003c\/strong\u003e Low voltage — below 50V AC or 75V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eThese micro switches use a snap-action mechanism. An external mechanical force (applied via the roller lever) actuates a spring reed. When the force reaches a critical threshold, the reed instantly snaps, causing the moving contact to connect or disconnect from the fixed contact at high speed. When the force is released, the spring reed reverses, resetting the switch instantaneously. This results in:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMinimal contact gap for precise actuation\u003c\/li\u003e\n  \u003cli\u003eShort stroke action for compact installations\u003c\/li\u003e\n  \u003cli\u003eLow operating force requirements\u003c\/li\u003e\n  \u003cli\u003eFast-break and fast-make switching action\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWide Application Range\u003c\/h3\u003e\n\u003cp\u003eThese KW12-3 limit switches are versatile components suited for a broad variety of uses, including:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComputer mice and peripheral devices\u003c\/li\u003e\n  \u003cli\u003eAutomotive electronics and car accessories\u003c\/li\u003e\n  \u003cli\u003eCommunications equipment\u003c\/li\u003e\n  \u003cli\u003eTest and measurement instruments\u003c\/li\u003e\n  \u003cli\u003eGas water heaters and gas burners\u003c\/li\u003e\n  \u003cli\u003eSmall home appliances\u003c\/li\u003e\n  \u003cli\u003eMicrowave ovens and electric rice cookers\u003c\/li\u003e\n  \u003cli\u003eFloating ball valve equipment\u003c\/li\u003e\n  \u003cli\u003eBuilding automation systems\u003c\/li\u003e\n  \u003cli\u003eElectric power tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Package\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e10 × KW12-3 Micro Roller Lever Limit Switches\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What voltage and current are the KW12-3 micro roller lever limit switches rated for?\u003c\/h4\u003e\n\u003cp\u003eA: Each KW12-3 micro switch is rated for AC 125V–250V and a current of up to 5A, making them suitable for a wide range of low-to-mid voltage PCB and circuit applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these KW12-3 limit switches suitable for DIY electronics and automation projects?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The KW12-3 PCB micro switches are popular in DIY electronics, 3D printers, CNC machines, and home automation projects thanks to their compact 20×10×6mm size, reliable snap-action mechanism, and easy PCB terminal mounting.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many switches are included in this pack?\u003c\/h4\u003e\n\u003cp\u003eA: This listing includes 10 KW12-3 micro roller lever limit switches, giving you excellent value for prototyping, repairs, or bulk component stocking.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What voltage and current are the KW12-3 micro roller lever limit switches rated for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each KW12-3 micro switch is rated for AC 125V–250V and a current of up to 5A, making them suitable for a wide range of low-to-mid voltage PCB and circuit applications.\"}}, {\"@type\": \"Question\", \"name\": \"Are these KW12-3 limit switches suitable for DIY electronics and automation projects?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Absolutely. The KW12-3 PCB micro switches are popular in DIY electronics, 3D printers, CNC machines, and home automation projects thanks to their compact 20×10×6mm size, reliable snap-action mechanism, and easy PCB terminal mounting.\"}}, {\"@type\": \"Question\", \"name\": \"How many switches are included in this pack?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This listing includes 10 KW12-3 micro roller lever limit switches, giving you excellent value for prototyping, repairs, or bulk component stocking.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"10Pcs KW12-3 Micro Roller Lever Limit Switch PCB Mount\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/products\/10pcs-kw12-3-micro-roller-lever-limit-switch-pcb\"}]}\u003c\/script\u003e","brand":"Quake","offers":[{"title":"10Pcs","offer_id":50286602485987,"sku":"14:771#10Pcs","price":11.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/9439\/1523\/files\/Sd488f2f21df04262983be3839b3a0feau.webp?v=1790289936","url":"https:\/\/quakegoods.com\/products\/10pcs-kw12-3-micro-roller-lever-limit-switch-pcb","provider":"Quake","version":"1.0","type":"link"}