A 3D printable DIN rail, works well in lab environments.
DIN rail dimensions:
top hat rail IEC/EN 60715-35 x 7.5
Should work with most DIN rail mountable circuit breakers, PLC's, relays, frequency drives,…..
Printing:
Print the model upright, 100% infill, no supports.
Feel free to modify the hole and length of the design in openSCAD.
The author hasn't provided the model origin yet.