Specific add-ons, such as Arduino shield templates, can be downloaded as .zip files containing .usr database files to be merged into your local environment. Third-Party Library Sources
While there is no single "all-in-one" download for the entire component library, users can expand their database through official updates, third-party libraries, and manual creation using SPICE models. Official Database Updates and Add-ons multisim component library download
If only a SPICE model is available: