This is a case for the Frei REG5V8A power supply (EAN 4251266707011).
This model is just a crude try to cover the power supply. The two parts don't have a locking mechanism and I've not printed it yet to see if it even fits.
This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/lu6cw3HZDRe
lu6cw3HZDRe.stl | 20.6KB |