This model enables the inexpensive LM317T regulator modules to be mounted on a 35mm DIN rail. I used Robert Hunt's useful SCAD script to create the basic DIN clip (https://www.thingiverse.com/thing:101024/remixes).

The PCB is held in place via two M3x6 self tapping screws. Note that there is a ceramic capacitor mounted closely to one of the mounting holes so be sure the screw head clears this, and I suggest not tightening this screw hard down as stress in the PCB can cause failure of these caps.

Kingroon

Kingroon KP3S

No

Yes

0.2mm

30%

Print with the side of the mount on the bed to ensure the retaining clip is strong enough. Supports will be needed, I used tree supports configured from build surface only in CURA. No brim etc should be needed.