Do you know where you can find the 3D model of electronic components, boards, sub assemblies, etc.?

I recommend you to follow the given flow to find 3d models:
- First search the Part with the Manufacturers or your PCB Design Software Library, if they offer 3D models
- Next option is to search component on distributor’s website (RS Components, Digikey, Mouser, Element14, etc.)
- Then, search on the other portals as mentioned below:
- SnapEDA
- Component Search Engine
- Distributors: Digikey | Mouser
- UltraLibrarian
- Octopart
- 3DContentCentral
- Solidworks
- GrabCAD
- TraceParts
- DesignSpark 3d Zone
- 3DWarehouse
- PCB-3D
- Turbosquid
- SketchFab
If you know of any other useful sites, let me know, I will add them here.