Save the downloaded LM741.mod or LM741.lib file in the same folder as your LTspice schematic ( .asc ).
The most reliable source for the LM741 SPICE model is the original manufacturer. lm741 opamp ltspice download
A commonly cited ZIP file containing the model is available at ti.com/lit/zip/snom211. Save the downloaded LM741
For quick access, some users host verified files on GitHub Gist or educational platforms like Engined.eu . 2. How to Import the Model into LTspice lm741 opamp ltspice download