Importing a Design from LTspice into Altium Designer

The LTspice file import capabilities are available through the LTSpice Importer software extension – show image.

Learn more about Extending Your Installation.

Library and Model files

• The successful import of an LTspice design relies on the availability of the design's component library data files, such as the supporting component symbol files (*.asy) and simulation model files (*.sub or *.lib, etc). All the required files should exist in the same source folder as the LTspice design file (*.asc) that is being imported.
• Contrary to the above, if the LTspice application has been installed on the PC that hosts Altium Designer, then the library files will automatically be detected in the LTSpice installation and added to the import process.
• Note that the Import Wizard also supports importing LTspice component library files (*.asy) only, without the need for a corresponding design file (*.asc).