Because Proteus is primarily centered around microcontrollers, many analog designers pivot to LTspice for pure power electronics. You can obtain standard 3524 SPICE packages by searching through the LTspice Groups.io directory .
0;faa;0;2cb; 0;d7;0;f1; 0;88;0;98; 0;279;0;17a; 0;1152;0;b19; sg3524 proteus library download link
Once you have downloaded the library files (typically consisting of files), follow these steps to integrate them: Locate the Library Folder sg3524 proteus library download link
C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\Data\LIBRARY sg3524 proteus library download link