Discontinued 2-pin model. We now stock 3-pin SPDT limit switches as our standard range. This 2-pin switch is brand new and carries our standard 12-month warranty.
The KW11-3Z is the mechanical limit switch behind most 3D printer and hobby CNC endstops. This is the 2-terminal version with a straight lever actuator, rated 5A at 250VAC and good for over a million mechanical cycles, so it holds up to repeated homing without drifting out of position.
Specifications
What's in the box
Single switch with the straight lever already fitted. No wiring loom or mounting screws included.
Great for
Wiring & getting started
- Two terminals, one circuit
This version has a single contact pair rather than the separate NO and NC contacts of the 3-pin model. Wire it like any simple switch: one terminal to the input or supply, the other to ground or the load.
- Check the resting state first
Put a multimeter on continuity across the two tabs and press the lever. That tells you straight away whether your unit rests open or closed, so you can set the circuit and firmware logic to match.
- Use as a printer or CNC endstop
Run the two terminals into the controller's endstop input, then set the endstop inverting option in Marlin, Klipper or GRBL to match the resting state you just measured.
- Low voltage signal use
At 3.3V or 5V, take one terminal to GND and the other to a digital input with a pull-up. No special precautions are needed at logic voltages.
- Mains voltage wiring
The 250VAC rating is real, but AC mains work must be carried out by a registered electrician under NZ wiring rules, using cable and terminals rated for the load.