KW11-3Z Mini Micro Limit Switch 2 Pin
$1.00 NZD
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$1.00 NZD
KW11-3Z Mini Micro Limit Switch 2 Pin
Stock amount:
Tax included. Shipping is calculated at checkout.
Urban $40
Rural $60
Compact, 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.
- Rated 5A 250VAC — suitable for signal and light load switching
- 1,000,000+ cycle mechanical life
- Straight lever actuator — consistent, repeatable actuation
- Low contact resistance — ≤50mΩ
- High insulation resistance — ≥100MΩ
- Compact form factor — drops into standard end-stop mounts
Why This Switch?
1
Proven in the maker community
The KW11-3Z is the go-to end-stop switch for 3D printers and CNC machines worldwide — well-documented, widely compatible.
2
One million cycle rating
Handles repetitive machine homing cycles without wearing out — rated for over 1,000,000 mechanical operations.
3
Straight lever actuator
Reduces side-load stress on the mechanism compared to standard lever types, extending service life in precision applications.
4
NZ stock — fast dispatch
Ships same or next business day from Te Awamutu. No waiting on international freight for a replacement end-stop.
Please note: 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.
Specifications
ModelKW11-3Z
Rating5A 250VAC
Contact Resistance≤50mΩ
Insulation Resistance≥100MΩ
Dielectric Strength≥1000VAC / 1 min
Mechanical Life≥1,000,000 cycles
Terminals2-pin (COM + NO/NC)
Actuator TypeStraight Lever
Quantity1 switch
Please note: For AC mains wiring (250VAC), installation must be carried out by a qualified electrician.
Wiring — KW11-3Z
COMCommon — always connected
NONormally Open — connects to COM when lever is pressed
NCNormally Closed — disconnects from COM when lever is pressed
Wiring Instructions
1
3D printer / CNC end-stop (most common)
Wire 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.
2
Using NC for fail-safe wiring
Wire 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.
3
Low-voltage signal use (3.3V / 5V)
Connect 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.
4
AC mains wiring (250VAC)
Must be installed by a qualified electrician in accordance with NZ wiring regulations. Use appropriately rated cable and terminals for the load current.
Please note: For AC mains wiring (250VAC), installation must be carried out by a qualified electrician.
What's Included
1×
KW11-3Z Micro Limit Switch
Straight lever actuator. Supplied as a single switch ready for installation. No wiring harness or mounting hardware included.
Please note: 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.
Common Uses
Laser engravers and cutters — end-stop and homing switches
CNC routers and mills — axis limit detection
3D printer axis homing — X, Y, and Z end-stops
Conveyor and automation systems — position sensing
DIY robotics and maker projects
Door and panel position detection in enclosures
Please note: 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.
Common Questions
Is this compatible with my 3D printer or CNC controller?
Yes — 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.
Should I wire NO or NC for machine homing?
NC (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.
What's the difference between the straight lever and roller lever variants?
The 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.
Can I use this at mains voltage (230–240VAC)?
Yes, 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.
Please note: For AC mains wiring (250VAC), installation must be carried out by a qualified electrician in accordance with NZ wiring regulations.