Most Proteus 8 installations include the IR2110 by default. However, if it is missing, you can manually add external library files (typically .LIB and .IDX formats):
Search: Use the "Pick Device" window (keyboard shortcut P) and type "IR2110" to find and place the component. Circuit Design Essentials Using the high-low side driver IR2110 - Tahmid's blog ir2110 library for proteus 8 link
In most Proteus 8 installations, the IR2110 is already available. Most Proteus 8 installations include the IR2110 by default
Adding the IR2110 library to Proteus 8 is a manual process involving file placement in the software's data directory. If you need accurate VSM simulation of IR2110
Since Proteus does not include a verified model for the IR2110 by default in all versions, you need to download the Proteus IR2110 Library files.