{"product_id":"kw11-3z-mini-micro-limit-switch-pulley-5a-250vac","title":"KW11-3Z Mini Micro Limit Switch 2 Pin","description":"\u003cstyle\u003e\n  .nzn-desc {\n    width: 100%;\n    max-width: 1400px;\n    margin: 0 auto;\n    font-family: inherit;\n    color: #101114;\n  }\n\n  .nzn-desc,\n  .nzn-desc * {\n    box-sizing: border-box;\n  }\n\n  .nzn-desc .nzn-tabs {\n    width: 100%;\n    max-width: 100%;\n    display: flex;\n    gap: 30px;\n    border-bottom: 1px solid #e7e7e7;\n    overflow-x: auto;\n    overflow-y: hidden;\n    scrollbar-width: none;\n    min-height: 55px;\n    align-items: flex-end;\n    -webkit-overflow-scrolling: touch;\n  }\n\n  .nzn-desc .nzn-tabs::-webkit-scrollbar {\n    display: none;\n  }\n\n  .nzn-desc .nzn-tab {\n    flex: 0 0 auto;\n    background: none;\n    border: 0;\n    padding: 16px 0;\n    font: inherit;\n    font-size: 14px;\n    font-weight: 800;\n    white-space: nowrap;\n    border-bottom: 3px solid transparent;\n    color: #101114;\n    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grid-template-columns: 1fr;\n    }\n\n    .nzn-desc .nzn-specs div {\n      grid-template-columns: 1fr;\n      gap: 4px;\n      padding: 13px 10px;\n    }\n\n    .nzn-desc .nzn-section-title {\n      text-align: left;\n      padding-top: 0;\n      margin-bottom: 22px;\n    }\n\n    .nzn-desc .nzn-started {\n      padding: 20px 16px;\n    }\n\n    .nzn-desc .nzn-included-card {\n      grid-template-columns: 1fr;\n      text-align: left;\n      justify-items: start;\n    }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"nzn-desc\"\u003e\n  \u003cdiv class=\"nzn-tabs\"\u003e\n    \u003cbutton class=\"nzn-tab is-active\" type=\"button\" data-tab=\"overview\"\u003eOverview\u003c\/button\u003e\n    \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"specifications\"\u003eSpecifications\u003c\/button\u003e\n    \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"wiring\"\u003eWiring\u003c\/button\u003e\n    \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"included\"\u003eWhat's Included\u003c\/button\u003e\n    \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"uses\"\u003eCommon Uses\u003c\/button\u003e\n    \u003cbutton class=\"nzn-tab\" type=\"button\" data-tab=\"faqs\"\u003eFAQs\u003c\/button\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"nzn-card\"\u003e\n\n    \u003c!-- OVERVIEW --\u003e\n    \u003cdiv class=\"nzn-panel is-active\" data-panel=\"overview\"\u003e\n      \u003cdiv class=\"nzn-panel-content\"\u003e\n        \u003cdiv class=\"nzn-overview\"\u003e\n          \u003cdiv class=\"nzn-overview-copy\"\u003e\n            \u003cp\u003eCompact, high-cycle micro limit switch designed for precision position sensing in laser cutters, CNC machines, 3D printers, and automation equipment. The straight lever actuator provides smooth, repeatable triggering with minimal operating force.\u003c\/p\u003e\n\n            \u003cul class=\"nzn-checks\"\u003e\n              \u003cli\u003eRated 5A 250VAC — suitable for signal and light load switching\u003c\/li\u003e\n              \u003cli\u003e1,000,000+ cycle mechanical life\u003c\/li\u003e\n              \u003cli\u003eStraight lever actuator — consistent, repeatable actuation\u003c\/li\u003e\n              \u003cli\u003eLow contact resistance — ≤50mΩ\u003c\/li\u003e\n              \u003cli\u003eHigh insulation resistance — ≥100MΩ\u003c\/li\u003e\n              \u003cli\u003eCompact form factor — drops into standard end-stop mounts\u003c\/li\u003e\n            \u003c\/ul\u003e\n          \u003c\/div\u003e\n\n          \u003cdiv class=\"nzn-started\"\u003e\n            \u003ch3\u003eWhy This Switch?\u003c\/h3\u003e\n\n            \u003cdiv class=\"nzn-step\"\u003e\n              \u003cspan\u003e1\u003c\/span\u003e\n              \u003cdiv\u003e\n                \u003cstrong\u003eProven in the maker community\u003c\/strong\u003e\n                \u003cp\u003eThe KW11-3Z is the go-to end-stop switch for 3D printers and CNC machines worldwide — well-documented, widely compatible.\u003c\/p\u003e\n              \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003cdiv class=\"nzn-step\"\u003e\n              \u003cspan\u003e2\u003c\/span\u003e\n              \u003cdiv\u003e\n                \u003cstrong\u003eOne million cycle rating\u003c\/strong\u003e\n                \u003cp\u003eHandles repetitive machine homing cycles without wearing out — rated for over 1,000,000 mechanical operations.\u003c\/p\u003e\n              \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003cdiv class=\"nzn-step\"\u003e\n              \u003cspan\u003e3\u003c\/span\u003e\n              \u003cdiv\u003e\n                \u003cstrong\u003eStraight lever actuator\u003c\/strong\u003e\n                \u003cp\u003eReduces side-load stress on the mechanism compared to standard lever types, extending service life in precision applications.\u003c\/p\u003e\n              \u003c\/div\u003e\n            \u003c\/div\u003e\n\n            \u003cdiv class=\"nzn-step\"\u003e\n              \u003cspan\u003e4\u003c\/span\u003e\n              \u003cdiv\u003e\n                \u003cstrong\u003eNZ stock — fast dispatch\u003c\/strong\u003e\n                \u003cp\u003eShips same or next business day from Te Awamutu. No waiting on international freight for a replacement end-stop.\u003c\/p\u003e\n              \u003c\/div\u003e\n            \u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e For AC mains wiring (250VAC), installation must be carried out by a qualified electrician. For low-voltage signal use (3.3V \/ 5V microcontroller), no special requirements apply.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- SPECIFICATIONS --\u003e\n    \u003cdiv class=\"nzn-panel\" data-panel=\"specifications\"\u003e\n      \u003cdiv class=\"nzn-panel-content\"\u003e\n        \u003ch3 class=\"nzn-section-title\"\u003eSpecifications\u003c\/h3\u003e\n\n        \u003cdiv class=\"nzn-specs\"\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eModel\u003c\/span\u003e\u003cstrong\u003eKW11-3Z\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eRating\u003c\/span\u003e\u003cstrong\u003e5A 250VAC\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eContact Resistance\u003c\/span\u003e\u003cstrong\u003e≤50mΩ\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eInsulation Resistance\u003c\/span\u003e\u003cstrong\u003e≥100MΩ\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eDielectric Strength\u003c\/span\u003e\u003cstrong\u003e≥1000VAC \/ 1 min\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eMechanical Life\u003c\/span\u003e\u003cstrong\u003e≥1,000,000 cycles\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eTerminals\u003c\/span\u003e\u003cstrong\u003e2-pin (COM + NO\/NC)\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eActuator Type\u003c\/span\u003e\u003cstrong\u003eStraight Lever\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eQuantity\u003c\/span\u003e\u003cstrong\u003e1 switch\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e For AC mains wiring (250VAC), installation must be carried out by a qualified electrician.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- WIRING --\u003e\n    \u003cdiv class=\"nzn-panel\" data-panel=\"wiring\"\u003e\n      \u003cdiv class=\"nzn-panel-content\"\u003e\n        \u003ch3 class=\"nzn-section-title\"\u003eWiring — KW11-3Z\u003c\/h3\u003e\n\n        \u003cdiv class=\"nzn-specs\"\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eCOM\u003c\/span\u003e\u003cstrong\u003eCommon — always connected\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eNO\u003c\/span\u003e\u003cstrong\u003eNormally Open — connects to COM when lever is pressed\u003c\/strong\u003e\n\u003c\/div\u003e\n          \u003cdiv\u003e\n\u003cspan\u003eNC\u003c\/span\u003e\u003cstrong\u003eNormally Closed — disconnects from COM when lever is pressed\u003c\/strong\u003e\n\u003c\/div\u003e\n        \u003c\/div\u003e\n\n        \u003cdiv class=\"nzn-started\" style=\"margin-top: 28px;\"\u003e\n          \u003ch3\u003eWiring Instructions\u003c\/h3\u003e\n\n          \u003cdiv class=\"nzn-step\"\u003e\n            \u003cspan\u003e1\u003c\/span\u003e\n            \u003cdiv\u003e\n              \u003cstrong\u003e3D printer \/ CNC end-stop (most common)\u003c\/strong\u003e\n              \u003cp\u003eWire COM and NO in series with your controller's end-stop input. When the axis triggers the lever, the circuit closes and the controller halts movement.\u003c\/p\u003e\n            \u003c\/div\u003e\n          \u003c\/div\u003e\n\n          \u003cdiv class=\"nzn-step\"\u003e\n            \u003cspan\u003e2\u003c\/span\u003e\n            \u003cdiv\u003e\n              \u003cstrong\u003eUsing NC for fail-safe wiring\u003c\/strong\u003e\n              \u003cp\u003eWire COM and NC so the circuit is normally closed. A broken wire or disconnected switch will open the circuit and trigger a fault — safer for machine homing.\u003c\/p\u003e\n            \u003c\/div\u003e\n          \u003c\/div\u003e\n\n          \u003cdiv class=\"nzn-step\"\u003e\n            \u003cspan\u003e3\u003c\/span\u003e\n            \u003cdiv\u003e\n              \u003cstrong\u003eLow-voltage signal use (3.3V \/ 5V)\u003c\/strong\u003e\n              \u003cp\u003eConnect COM to GND and NO (or NC) to a digital input pin with a pull-up resistor. No special wiring precautions needed at logic voltages.\u003c\/p\u003e\n            \u003c\/div\u003e\n          \u003c\/div\u003e\n\n          \u003cdiv class=\"nzn-step\"\u003e\n            \u003cspan\u003e4\u003c\/span\u003e\n            \u003cdiv\u003e\n              \u003cstrong\u003eAC mains wiring (250VAC)\u003c\/strong\u003e\n              \u003cp\u003eMust be installed by a qualified electrician in accordance with NZ wiring regulations. Use appropriately rated cable and terminals for the load current.\u003c\/p\u003e\n            \u003c\/div\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e For AC mains wiring (250VAC), installation must be carried out by a qualified electrician.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- INCLUDED --\u003e\n    \u003cdiv class=\"nzn-panel\" data-panel=\"included\"\u003e\n      \u003cdiv class=\"nzn-panel-content\"\u003e\n        \u003ch3 class=\"nzn-section-title\"\u003eWhat's Included\u003c\/h3\u003e\n\n        \u003cdiv class=\"nzn-included-card\"\u003e\n          \u003cdiv class=\"nzn-included-qty\"\u003e1×\u003c\/div\u003e\n          \u003cdiv\u003e\n            \u003cstrong\u003eKW11-3Z Micro Limit Switch\u003c\/strong\u003e\n            \u003cp\u003eStraight lever actuator. Supplied as a single switch ready for installation. No wiring harness or mounting hardware included.\u003c\/p\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e Mounting screws and wiring are not included. The KW11-3Z fits standard M2 mounting holes found on most 3D printer and CNC end-stop brackets.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- USES --\u003e\n    \u003cdiv class=\"nzn-panel\" data-panel=\"uses\"\u003e\n      \u003cdiv class=\"nzn-panel-content\"\u003e\n        \u003ch3 class=\"nzn-section-title\"\u003eCommon Uses\u003c\/h3\u003e\n\n        \u003cdiv class=\"nzn-uses\"\u003e\n          \u003cdiv class=\"nzn-use\"\u003eLaser engravers and cutters — end-stop and homing switches\u003c\/div\u003e\n          \u003cdiv class=\"nzn-use\"\u003eCNC routers and mills — axis limit detection\u003c\/div\u003e\n          \u003cdiv class=\"nzn-use\"\u003e3D printer axis homing — X, Y, and Z end-stops\u003c\/div\u003e\n          \u003cdiv class=\"nzn-use\"\u003eConveyor and automation systems — position sensing\u003c\/div\u003e\n          \u003cdiv class=\"nzn-use\"\u003eDIY robotics and maker projects\u003c\/div\u003e\n          \u003cdiv class=\"nzn-use\"\u003eDoor and panel position detection in enclosures\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e The KW11-3Z is compatible with Marlin, Klipper, GRBL, and most other open-source machine control firmware when wired to a standard end-stop input.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- FAQs --\u003e\n    \u003cdiv class=\"nzn-panel\" data-panel=\"faqs\"\u003e\n      \u003cdiv class=\"nzn-panel-content\"\u003e\n        \u003ch3 class=\"nzn-section-title\"\u003eCommon Questions\u003c\/h3\u003e\n\n        \u003cdiv class=\"nzn-faq\"\u003e\n          \u003cdiv class=\"nzn-faq-item\"\u003e\n            \u003cstrong\u003eIs this compatible with my 3D printer or CNC controller?\u003c\/strong\u003e\n            \u003cp\u003eYes — the KW11-3Z is the standard micro limit switch used in the vast majority of 3D printers and hobby CNC machines. It's compatible with Marlin, Klipper, GRBL, RepRap, and most other controller boards that accept a 2-pin end-stop input.\u003c\/p\u003e\n          \u003c\/div\u003e\n\n          \u003cdiv class=\"nzn-faq-item\"\u003e\n            \u003cstrong\u003eShould I wire NO or NC for machine homing?\u003c\/strong\u003e\n            \u003cp\u003eNC (Normally Closed) is recommended for machine homing. It provides fail-safe behaviour — if a wire breaks or the switch disconnects, the controller will detect the open circuit as a triggered state and stop movement, preventing crashes.\u003c\/p\u003e\n          \u003c\/div\u003e\n\n          \u003cdiv class=\"nzn-faq-item\"\u003e\n            \u003cstrong\u003eWhat's the difference between the straight lever and roller lever variants?\u003c\/strong\u003e\n            \u003cp\u003eThe straight lever (this variant) is the most common and suits direct contact with a carriage or bed. A roller lever reduces friction when the actuating surface slides across the lever at an angle — useful on some CNC and laser cutter designs.\u003c\/p\u003e\n          \u003c\/div\u003e\n\n          \u003cdiv class=\"nzn-faq-item\"\u003e\n            \u003cstrong\u003eCan I use this at mains voltage (230–240VAC)?\u003c\/strong\u003e\n            \u003cp\u003eYes, it is rated 5A 250VAC. However, AC mains wiring must be carried out by a qualified electrician in accordance with NZ electrical regulations. For microcontroller use at 3.3V or 5V, no special precautions are needed.\u003c\/p\u003e\n          \u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"nzn-note\"\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e For AC mains wiring (250VAC), installation must be carried out by a qualified electrician in accordance with NZ wiring regulations.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript\u003e\n  document.addEventListener('click', function(event) {\n    const tab = event.target.closest('.nzn-desc .nzn-tab');\n    if (!tab) return;\n\n    const wrapper = tab.closest('.nzn-desc');\n    if (!wrapper) return;\n\n    const target = tab.getAttribute('data-tab');\n\n    wrapper.querySelectorAll('.nzn-tab').forEach(function(item) {\n      item.classList.remove('is-active');\n    });\n\n    wrapper.querySelectorAll('.nzn-panel').forEach(function(panel) {\n      panel.classList.remove('is-active');\n    });\n\n    tab.classList.add('is-active');\n\n    const panel = wrapper.querySelector('[data-panel=\"' + target + '\"]');\n    if (panel) panel.classList.add('is-active');\n  });\n\u003c\/script\u003e","brand":"NZN Electronics","offers":[{"title":"Default Title","offer_id":42719034245216,"sku":"SW-KW11-3Z-2PIN","price":1.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/KW11-3Z-TOpdown.png?v=1780030103","url":"https:\/\/www.nznelectronics.co.nz\/products\/kw11-3z-mini-micro-limit-switch-pulley-5a-250vac","provider":"NZN Electronics","version":"1.0","type":"link"}