{"product_id":"kw4-3z-3-micro-limit-switch-spdt-roller-lever-3-pack","title":"3-Pack KW4-3Z-3 Miniature Micro Limit Switch SPDT Roller Lever","description":"\u003ch2\u003e3-Pack KW4-3Z-3 Miniature Micro Limit Switch with Hinge Roller Lever\u003c\/h2\u003e\n\u003cp\u003eUpgrade your electronics, automation projects, and appliances with this reliable set of three \u003cstrong\u003eKW4-3Z-3 Miniature Micro Limit Switches\u003c\/strong\u003e. Featuring a Single Pole Double Throw (SPDT) NO+NC contact form, these compact microswitches deliver fast, precise switching action — perfect for DIY electronics, robotics, CNC machines, 3D printers, and industrial control systems.\u003c\/p\u003e\n\n\u003cp\u003eBuilt from durable thermosetting or thermoplastic material and engineered for millions of operations, these microswitches offer outstanding longevity and consistent performance across a wide range of applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMomentary Snap Action:\u003c\/strong\u003e Small contact gap and high sensitivity ensure fast, reliable actuation every time.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSPDT NO+NC Configuration:\u003c\/strong\u003e Versatile 3-terminal design supports both Normally Open (NO) and Normally Closed (NC) circuit configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGreen Hinge Roller Lever:\u003c\/strong\u003e Allows smooth, precise mechanical triggering from multiple directions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Temperature Range:\u003c\/strong\u003e Operates reliably from -25°C to +80°C (-13°F to +176°F).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Durability:\u003c\/strong\u003e Rated for a minimum of 100,000 electrical operations and 10,000,000 mechanical operations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Size:\u003c\/strong\u003e Measures just 23 x 21 x 7 mm (0.91 x 0.83 x 0.28 in.), ideal for tight spaces.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e365-Day Warranty\u003c\/strong\u003e included for peace of mind.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKW4-3Z-3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Form\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSPDT NO+NC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5A \/ 250V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePin Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 Terminals\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperation Speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.1mm\/s – 1m\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 mΩ max. (initial)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInsulation Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 mΩ min. (at DC 500V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectrical Life\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100,000 operations min. (full load)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMechanical Life\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10,000,000 operations min.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-25°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e23 x 21 x 7 mm \/ 0.91 x 0.83 x 0.28 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThermosetting \/ Thermoplastic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCNC machines and 3D printers (end-stop \/ limit detection)\u003c\/li\u003e\n  \u003cli\u003eHome and industrial appliances\u003c\/li\u003e\n  \u003cli\u003eElectronic equipment and control panels\u003c\/li\u003e\n  \u003cli\u003eAutomatic machinery and robotics\u003c\/li\u003e\n  \u003cli\u003eCommunication equipment and instruments\u003c\/li\u003e\n  \u003cli\u003ePower tools and electric motors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e3 × KW4-3Z-3 Miniature Micro Limit Switch (Hinge Roller Lever)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does SPDT NO+NC mean on the KW4-3Z-3 micro limit switch?\u003c\/h4\u003e\n\u003cp\u003eA: SPDT stands for Single Pole Double Throw. The switch has three terminals: one Common (C), one Normally Open (NO), and one Normally Closed (NC). In its resting state, current flows through the NC terminal. When the roller lever is actuated, the circuit switches to the NO terminal. This makes the KW4-3Z-3 extremely versatile for various wiring configurations in electronics and automation projects.\u003c\/p\u003e\n\u003ch4\u003eQ: Can these micro limit switches be used in a 3D printer or CNC machine as end-stops?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — the KW4-3Z-3 is one of the most popular micro limit switch models used as end-stops in 3D printers, CNC routers, and laser cutters. The compact 23 x 21 x 7 mm size, hinge roller lever, and momentary snap action make it ideal for precise position detection in these applications.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the rated electrical capacity of these miniature micro switches?\u003c\/h4\u003e\n\u003cp\u003eA: Each KW4-3Z-3 micro limit switch is rated for 5A at 250V AC, making it suitable for most low-to-medium voltage control circuits. They are designed for low-voltage applications (below 50V AC or 75V DC per EU LVD guidelines) in typical signal and light-load switching scenarios.\u003c\/p\u003e\n\u003ch4\u003eQ: How many times can the KW4-3Z-3 be actuated before it wears out?\u003c\/h4\u003e\n\u003cp\u003eA: These switches are built to last. Each unit is rated for a minimum of 100,000 full-load electrical operations and an impressive 10,000,000 mechanical operations, making them a durable, long-lasting choice for both prototyping and production use.\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 does SPDT NO+NC mean on the KW4-3Z-3 micro limit switch?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"SPDT stands for Single Pole Double Throw. The switch has three terminals: one Common (C), one Normally Open (NO), and one Normally Closed (NC). In its resting state, current flows through the NC terminal. When the roller lever is actuated, the circuit switches to the NO terminal. 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Each unit is rated for a minimum of 100,000 full-load electrical operations and an impressive 10,000,000 mechanical operations, making them a durable, long-lasting choice for both prototyping and production use.\"}}]}\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\": \"3-Pack KW4-3Z-3 Miniature Micro Limit Switch SPDT Roller Lever\", \"item\": \"https:\/\/0dwbi8-fa.myshopify.com\/products\/kw4-3z-3-micro-limit-switch-spdt-roller-lever-3-pack\"}]}\u003c\/script\u003e","brand":"Quake","offers":[{"title":"Roller 3PCS","offer_id":50286613987555,"sku":"14:350852#Roller 3PCS","price":13.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/9439\/1523\/files\/H4c86b2b953a6471b831869baffd613566.webp?v=1790289962","url":"https:\/\/quakegoods.com\/products\/kw4-3z-3-micro-limit-switch-spdt-roller-lever-3-pack","provider":"Quake","version":"1.0","type":"link"}