Because there is no common format that all electronics CAD vendors support, we have created our own. We then export to the various PCB design software formats.
Here's an example of how we've worked with Vishay to make the symbols, footprints, and 3D models available in one place: https://www.snapeda.com/parts/SFH6319T/Vishay/view-part/. Please stay tuned for simulation models!