{"title":"Limit Switches","description":"\u003cp\u003eMicro limit switches and endstops for 3D printers, CNC machines and DIY automation — KW11-3Z and SC7301, SPDT 5A 250VAC, with and without levers.\u003c\/p\u003e","products":[{"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 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align-items: flex-start;\n      gap: 10px;\n      font-size: 14px;\n      text-align: left;\n    }\n\n    .nzn-desc .nzn-checks li::before {\n      margin-top: 2px;\n    }\n\n    .nzn-desc .nzn-uses {\n      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      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0;font-weight:700;font-size:14px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px}\n.nznpd__faq summary::-webkit-details-marker{display:none}\n.nznpd__faq summary::after{content:\"\\203A\";flex:0 0 auto;color:var(--o);font-weight:800;font-size:20px;line-height:1;display:inline-block;transform:rotate(90deg);transition:transform .22s ease}\n.nznpd__faq[open] summary::after{transform:rotate(-90deg)}\n.nznpd__faq p{padding:0 0 16px;font-size:14px}\n.nznpd__faq[open] p{animation:nznpdReveal .24s ease}\n@keyframes nznpdReveal{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}\n.nznpd p.nznpd__note{margin-top:16px;background:var(--soft);border:2px solid var(--line);border-radius:12px;padding:14px 16px;font-size:13.5px;color:var(--mut);line-height:1.55}\n@media(prefers-reduced-motion:reduce){.nznpd__faq summary::after{transition:none}.nznpd__faq[open] p{animation:none}}\n@media(max-width:749px){.nznpd__checks{column-count:1}.nznpd__uses{grid-template-columns:1fr}.nznpd__spec{grid-template-columns:1fr;gap:2px}}\n\u003c\/style\u003e\n\u003cdiv class=\"nznpd\"\u003e\n\u003cdiv class=\"nznpd__lead\"\u003e\n\u003cp class=\"nznpd__intro\"\u003eThe SC7301 is a compact 3-pin SPDT micro limit switch fitted with a sprung lever arm, rated 5A at 250VAC. It's the lever-arm switch in the popular KW11-3Z endstop family — a go-to position sensor for 3D printers, CNC machines, laser cutters and DIY automation. The lever gives smooth, low-force triggering as a cam, carriage, gantry or door sweeps past, and its three terminals (common, normally-open and normally-closed) let you wire it as either a normally-open or normally-closed trigger. A snap-action mechanism delivers a crisp, repeatable click every time.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cul class=\"nznpd__checks\"\u003e\n\u003cli\u003eSPDT contacts — one common (C), one normally-open (NO) and one normally-closed (NC) terminal\u003c\/li\u003e\n\u003cli\u003eSprung lever arm — smooth, low-force triggering as a target sweeps past\u003c\/li\u003e\n\u003cli\u003eRated 5A at 250VAC — handles mains or low-voltage DC switching\u003c\/li\u003e\n\u003cli\u003eSnap-action mechanism for a sharp, repeatable trigger point\u003c\/li\u003e\n\u003cli\u003eLong life — rated for over 1,000,000 operating cycles\u003c\/li\u003e\n\u003cli\u003eLow contact resistance — ≤50 mΩ\u003c\/li\u003e\n\u003cli\u003eHigh insulation resistance — ≥100 MΩ\u003c\/li\u003e\n\u003cli\u003eDielectric strength ≥1000VAC for 1 minute\u003c\/li\u003e\n\u003cli\u003eKW11-3Z-style body and mounting — drops into standard endstop brackets\u003c\/li\u003e\n\u003cli\u003eIdeal as a 3D printer \/ CNC endstop or door \/ limit sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eSpecifications\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__specs\"\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eModel\u003c\/span\u003e\u003cstrong\u003eSC7301\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eType\u003c\/span\u003e\u003cstrong\u003e3-pin SPDT lever micro limit switch\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eCompatibility\u003c\/span\u003e\u003cstrong\u003eKW11-3Z-style endstop mounts\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eContact Form\u003c\/span\u003e\u003cstrong\u003eSPDT — 1 common, 1 NO, 1 NC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eTerminals\u003c\/span\u003e\u003cstrong\u003e3 pins (C \/ NO \/ NC) — solder or spade\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eActuator\u003c\/span\u003e\u003cstrong\u003eSprung lever arm\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eRated Current \/ Voltage\u003c\/span\u003e\u003cstrong\u003e5A 250VAC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eContact Resistance\u003c\/span\u003e\u003cstrong\u003e≤50 mΩ\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eInsulation Resistance\u003c\/span\u003e\u003cstrong\u003e≥100 MΩ\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eDielectric Strength\u003c\/span\u003e\u003cstrong\u003e≥1000VAC for 1 minute\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMechanical \/ Electrical Life\u003c\/span\u003e\u003cstrong\u003e≥1,000,000 cycles\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMounting\u003c\/span\u003e\u003cstrong\u003e2 × mounting holes\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eWhat's in the pack\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__included\"\u003e\n\u003cdiv class=\"nznpd__qty\"\u003e×\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSC7301 Lever Micro Limit Switches\u003c\/strong\u003e\n\u003cp\u003eQuantity as selected. Ready to wire — no extra components required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eGreat for\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__uses\"\u003e\n\u003cdiv class=\"nznpd__use\"\u003e3D printer X \/ Y \/ Z endstops\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eCNC and laser-cutter travel limits\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eDoor, lid and drawer detection\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eRobotics bump and contact sensors\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eConveyor and gantry end-of-travel limits\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eGeneral DIY automation and Arduino projects\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003cdiv class=\"nznpd__qs\"\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003col class=\"nznpd__steps\"\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eIdentify the three terminals\u003c\/strong\u003e\n\u003cp\u003eThe pins are common (C), normally-open (NO) and normally-closed (NC). On most SC7301 \/ KW11-3Z bodies the centre pin is the common; check the moulded markings or test with a multimeter in continuity mode.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eChoose NO or NC\u003c\/strong\u003e\n\u003cp\u003eWire C + NO for a circuit that closes (turns on) when the lever is pressed, or C + NC for one that opens (turns off) when pressed. For 3D printer \/ CNC endstops, NC wiring is often preferred so a broken wire reads as triggered.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eMount the switch\u003c\/strong\u003e\n\u003cp\u003eFix it through the two mounting holes so the lever arm meets your moving part right at the travel limit. Leave a little over-travel so the switch fully actuates without bottoming out.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eTest the click\u003c\/strong\u003e\n\u003cp\u003eActuate the lever by hand — you should feel a firm snap and hear a distinct click as the contacts change over. Confirm the switching with a multimeter before wiring it into your machine.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eCommon questions\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__faqs\"\u003e\n\u003cdetails class=\"nznpd__faq\" open\u003e\n\u003csummary\u003eWhen should I choose the lever version?\u003c\/summary\u003e\n\u003cp\u003eThe sprung lever arm is ideal where a cam, carriage, gantry or door sweeps past the switch — it gives smooth, low-force triggering and a bit of stand-off from the moving part. If your target presses the switch straight on in a tight space, the plain no-lever KW11-3Z is the better fit.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eWhat do the three pins do?\u003c\/summary\u003e\n\u003cp\u003eThis is an SPDT (single-pole double-throw) switch. The common terminal (C) connects to the normally-closed (NC) contact when the switch is at rest, and to the normally-open (NO) contact when pressed. You only ever use two of the three pins for a given circuit — C plus whichever of NO or NC you need.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eCan I use it as a 3D printer or CNC endstop?\u003c\/summary\u003e\n\u003cp\u003eYes — the SC7301 is the lever version of the hugely popular KW11-3Z endstop, used across 3D printers, CNC machines and laser cutters. Wire C + NC (or C + NO to match your board's logic) and connect to your controller's endstop input.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eHow much can it switch?\u003c\/summary\u003e\n\u003cp\u003eIt's rated 5A at 250VAC, so it comfortably handles low-voltage logic signals (3.3V \/ 5V), DC loads and mains-voltage switching within that limit. Stay within the rating and observe normal mains-voltage safety practice when switching AC.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003cp class=\"nznpd__note\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e Two of the three terminals are used per circuit — common (C) plus either NO or NC. For machine endstops, NC wiring is commonly preferred so a damaged wire fails safe as \"triggered\". The switch is rated to 5A \/ 250VAC; keep within that limit and follow standard mains-voltage safety practice when switching AC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"NZN Electronics","offers":[{"title":"Default","offer_id":42896612655200,"sku":"SW-KW11-3Z-3PIN-LV","price":1.75,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/SC7301Topdowntopdown.png?v=1782280231"},{"product_id":"kw11-3z-micro-limit-switch-no-lever-3-pin-spdt-5a-250vac","title":"KW11-3Z Micro Limit Switch No Lever – 3-Pin SPDT 5A 250VAC","description":"\u003cstyle\u003e\n.nznpd{--o:#F57C00;--od:#E65100;--ink:#0F172A;--mut:#5b6573;--line:#E8ECF0;--soft:#F7F8FA;max-width:1120px;margin:0 auto;color:var(--ink);font-family:inherit;line-height:1.6}\n.nznpd,.nznpd *{box-sizing:border-box}\n.nznpd p{margin:0;color:var(--mut);font-size:15px;line-height:1.65}\n.nznpd 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span{color:var(--mut)}\n.nznpd__spec strong{font-weight:700}\n.nznpd__included{display:flex;gap:16px;align-items:center;border:2px solid var(--line);border-radius:16px;background:var(--soft);padding:18px 20px}\n.nznpd__qty{flex:0 0 auto;width:46px;height:46px;border-radius:12px;background:#FFF3E8;color:var(--o);font-weight:800;display:flex;align-items:center;justify-content:center}\n.nznpd__included strong{display:block;font-size:15px;margin-bottom:3px}\n.nznpd__uses{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}\n.nznpd__use{padding:13px 14px;background:var(--soft);border-left:3px solid var(--o);border-radius:0 10px 10px 0;font-size:14px;color:var(--ink);line-height:1.4}\n.nznpd__faqs{display:grid;gap:10px}\n.nznpd__faq{border:2px solid var(--line);border-radius:12px;background:#fff;padding:0 16px;transition:border-color .18s ease}\n.nznpd__faq[open]{border-color:#FCE0C6}\n.nznpd__faq summary{list-style:none;cursor:pointer;padding:15px 0;font-weight:700;font-size:14px;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:12px}\n.nznpd__faq summary::-webkit-details-marker{display:none}\n.nznpd__faq summary::after{content:\"\\203A\";flex:0 0 auto;color:var(--o);font-weight:800;font-size:20px;line-height:1;display:inline-block;transform:rotate(90deg);transition:transform .22s ease}\n.nznpd__faq[open] summary::after{transform:rotate(-90deg)}\n.nznpd__faq p{padding:0 0 16px;font-size:14px}\n.nznpd__faq[open] p{animation:nznpdReveal .24s ease}\n@keyframes nznpdReveal{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}\n.nznpd p.nznpd__note{margin-top:16px;background:var(--soft);border:2px solid var(--line);border-radius:12px;padding:14px 16px;font-size:13.5px;color:var(--mut);line-height:1.55}\n@media(prefers-reduced-motion:reduce){.nznpd__faq summary::after{transition:none}.nznpd__faq[open] p{animation:none}}\n@media(max-width:749px){.nznpd__checks{column-count:1}.nznpd__uses{grid-template-columns:1fr}.nznpd__spec{grid-template-columns:1fr;gap:2px}}\n\u003c\/style\u003e\n\u003cdiv class=\"nznpd\"\u003e\n\u003cdiv class=\"nznpd__lead\"\u003e\n\u003cp class=\"nznpd__intro\"\u003eThe KW11-3Z (Liao Yuan) is a compact 3-pin SPDT micro limit switch in the plain no-lever style — just a short pin plunger with no actuating arm — rated 5A at 250VAC. It's ideal where space is tight and the moving part presses the button directly: endstops, lid and door detection, and position sensing in 3D printers, CNC machines, laser cutters and DIY automation. Its three terminals (common, normally-open and normally-closed) let you wire it as either a normally-open or normally-closed trigger, with a snap-action mechanism for a crisp, repeatable click.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cul class=\"nznpd__checks\"\u003e\n\u003cli\u003eSPDT contacts — one common (C), one normally-open (NO) and one normally-closed (NC) terminal\u003c\/li\u003e\n\u003cli\u003ePlain no-lever actuator — short pin plunger for tight spaces and direct contact\u003c\/li\u003e\n\u003cli\u003eRated 5A at 250VAC — handles mains or low-voltage DC switching\u003c\/li\u003e\n\u003cli\u003eSnap-action mechanism for a sharp, repeatable trigger point\u003c\/li\u003e\n\u003cli\u003eLong life — rated for over 1,000,000 operating cycles\u003c\/li\u003e\n\u003cli\u003eLow contact resistance — ≤50 mΩ\u003c\/li\u003e\n\u003cli\u003eHigh insulation resistance — ≥100 MΩ\u003c\/li\u003e\n\u003cli\u003eDielectric strength ≥1000VAC for 1 minute\u003c\/li\u003e\n\u003cli\u003eTwo mounting holes for quick, secure fixing\u003c\/li\u003e\n\u003cli\u003eIdeal as a 3D printer \/ CNC endstop or limit sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eSpecifications\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__specs\"\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eModel\u003c\/span\u003e\u003cstrong\u003eKW11-3Z micro limit switch (no lever)\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eBrand\u003c\/span\u003e\u003cstrong\u003eLiao Yuan\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eContact Form\u003c\/span\u003e\u003cstrong\u003eSPDT — 1 common, 1 NO, 1 NC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eTerminals\u003c\/span\u003e\u003cstrong\u003e3 pins (C \/ NO \/ NC) — solder or spade\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eActuator\u003c\/span\u003e\u003cstrong\u003ePlain push button \/ pin plunger (no lever)\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eRated Current \/ Voltage\u003c\/span\u003e\u003cstrong\u003e5A 250VAC\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eContact Resistance\u003c\/span\u003e\u003cstrong\u003e≤50 mΩ\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eInsulation Resistance\u003c\/span\u003e\u003cstrong\u003e≥100 MΩ\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eDielectric Strength\u003c\/span\u003e\u003cstrong\u003e≥1000VAC for 1 minute\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMechanical \/ Electrical Life\u003c\/span\u003e\u003cstrong\u003e≥1,000,000 cycles\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"nznpd__spec\"\u003e\n\u003cspan\u003eMounting\u003c\/span\u003e\u003cstrong\u003e2 × mounting holes\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eWhat's in the pack\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__included\"\u003e\n\u003cdiv class=\"nznpd__qty\"\u003e×\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eKW11-3Z No-Lever Micro Limit Switches\u003c\/strong\u003e\n\u003cp\u003eQuantity as selected. Ready to wire — no extra components required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eGreat for\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__uses\"\u003e\n\u003cdiv class=\"nznpd__use\"\u003e3D printer X \/ Y \/ Z endstops\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eCNC and laser-cutter travel limits\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eLid, door and drawer detection\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eRobotics bump and contact sensors\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eTight-space position sensing\u003c\/div\u003e\n\u003cdiv class=\"nznpd__use\"\u003eGeneral DIY automation and Arduino projects\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003cdiv class=\"nznpd__qs\"\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003col class=\"nznpd__steps\"\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eIdentify the three terminals\u003c\/strong\u003e\n\u003cp\u003eThe pins are common (C), normally-open (NO) and normally-closed (NC). On most KW11-3Z bodies the centre pin is the common; check the moulded markings or test with a multimeter in continuity mode.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eChoose NO or NC\u003c\/strong\u003e\n\u003cp\u003eWire C + NO for a circuit that closes (turns on) when the button is pressed, or C + NC for one that opens (turns off) when pressed. For 3D printer \/ CNC endstops, NC wiring is often preferred so a broken wire reads as triggered.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eMount the switch\u003c\/strong\u003e\n\u003cp\u003eFix it through the two mounting holes so your moving part presses the plunger directly at the travel limit. Leave a little over-travel so the switch fully actuates without bottoming out.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cdiv\u003e\n\u003cstrong\u003eTest the click\u003c\/strong\u003e\n\u003cp\u003ePress the plunger by hand — you should feel a firm snap and hear a distinct click as the contacts change over. Confirm the switching with a multimeter before wiring it into your machine.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"nznpd__block\"\u003e\n\u003ch3 class=\"nznpd__h\"\u003eCommon questions\u003c\/h3\u003e\n\u003cbr\u003e\n\u003cdiv class=\"nznpd__faqs\"\u003e\n\u003cdetails class=\"nznpd__faq\" open\u003e\n\u003csummary\u003eDoes this version have a lever?\u003c\/summary\u003e\n\u003cp\u003eNo — this is the plain no-lever KW11-3Z, with just a short pin plunger and no actuating arm. It's designed for tight spaces where the moving part presses the button straight on. If you need a sprung arm to catch a cam or gantry sweeping past, choose the SC7301 (lever) version instead.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eWhat do the three pins do?\u003c\/summary\u003e\n\u003cp\u003eThis is an SPDT (single-pole double-throw) switch. The common terminal (C) connects to the normally-closed (NC) contact when the switch is at rest, and to the normally-open (NO) contact when pressed. You only ever use two of the three pins for a given circuit — C plus whichever of NO or NC you need.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eCan I use it as a 3D printer or CNC endstop?\u003c\/summary\u003e\n\u003cp\u003eYes — the KW11-3Z is one of the most common mechanical endstops for 3D printers, CNC machines and laser cutters. Wire C + NC (or C + NO to match your board's logic) and connect to your controller's endstop input. The no-lever style suits builds where the carriage or bed contacts the plunger directly.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"nznpd__faq\"\u003e\n\u003csummary\u003eHow much can it switch?\u003c\/summary\u003e\n\u003cp\u003eIt's rated 5A at 250VAC, so it comfortably handles low-voltage logic signals (3.3V \/ 5V), DC loads and mains-voltage switching within that limit. Stay within the rating and observe normal mains-voltage safety practice when switching AC.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003cp class=\"nznpd__note\"\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e Two of the three terminals are used per circuit — common (C) plus either NO or NC. For machine endstops, NC wiring is commonly preferred so a damaged wire fails safe as \"triggered\". The switch is rated to 5A \/ 250VAC; keep within that limit and follow standard mains-voltage safety practice when switching AC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"NZN Electronics","offers":[{"title":"Default","offer_id":42896612687968,"sku":"SW-KW11-3Z-3PIN-NL","price":1.59,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/files\/KW11-3ZTopdown.png?v=1782280315"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0664\/6127\/0112\/collections\/SC7301Topdowntopdown.png?v=1783661894","url":"https:\/\/www.nznelectronics.co.nz\/collections\/limit-switches.oembed","provider":"NZN Electronics","version":"1.0","type":"link"}