DSN files reference 'symbols,' which are the electronic components used to make up the design (stored in. It saves the circuit schematic and is often one of several files included in a OrCAD project (. What is a DSN file on a PCB? A DSN file is a PCB (printed circuit board) design file created by OrCAD, a program used to design PCBs. (if exist software for corresponding action in 's database). and possible program actions that can be done with the file: like open dsn file, edit dsn file, convert dsn file, view dsn file, play dsn file etc. dsn schematics to other PCB format, or perhaps some exchange format. FAQ about Dsn Schematic Viewer Convert Is it possible to export.dsn schematics to another format? It should be possible to export.