Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4162205.IRF520 Module Case
A 3D Printable case for an IRF520 Module
The IRF520 module can be used to control a fan, LEDs, etc. I use it with my Ender 3 Pro to control the extruder fan via an unused pin on my SKR E3 DIP controller.
Thanks to Eduardo Melo for the IRF520 Module model I used when designing this.