Mech Endstop V1.2 Mechanical Limit Switch for 3D Printer

The MECH-ENDSTOPV12 is a mechanical limit switch module designed for 3D printers and CNC machines, used to detect the end of travel on the X, Y, and Z axes and prevent the print head from colliding with the heated bed. At its core is a mechanical tactile microswitch that operates in either normally open (NO) or normally closed (NC) configuration, giving users flexibility in wiring and firmware setup. The module includes an onboard LED that lights up when the switch is triggered, providing clear visual confirmation of endstop activation. It connects to RAMPS 1.4 and other common 3D printer controller boards through a 3-pin cable (red for VCC, black for GND, green for SIGNAL), with 22AWG wire and a 70 cm cable length for easy routing. The switch is rated for up to 300V DC, 2A, and 600W, and can operate at temperatures up to 80°C. Measuring 45 × 16 × 8 mm, the compact PCB fits standard mounting points on RepRap-style printers and DIY CNC builds. This 3D printer endstop is also suitable as a general CNC limit switch for axis-end detection and motion safety. A typical 3D printer requires at least three of these modules (one per axis), making this a practical spare or upgrade part for printer maintenance.