This DIN-rail mount is designed as a simple, reliable way to give your 4-channel relay module a clean and professional home inside any enclosure.
To build the assembly, print two DIN-clip parts along with one module holder. Once printed, attach the DIN-clips to the underside of the holder using a small amount of superglue—they lock into position nicely and create a solid mounting base.

With the clips in place, the relay module itself can be secured from the top using an M3×6 mm hex screw, ensuring it stays firmly seated even in tighter electrical setups.

For best results, print with:

• PETG
• 0.2 mm layer height
• 0.4 mm extrusion width
• scarf-joint enabled

This combination delivers strong, dimensionally stable parts ready for practical use.