.CPA File Extension
What is a CPA file?
CAD file created by CADSTAR, an application used to create printed circuit board (PCB) designs; may contain a PCB design or a PCB component library; used for exporting, importing, and archiving designs.
CPA files are usually exported from .PCB files created in CADSTAR. CPA files can also be imported and exported using Altium Designer, another PCB design application.