A larger 678 KB PDF for the 40MT120UH, filed as a schematic. In this naming family the MT prefix points to a power module, and parts with this kind of suffix are typically IGBT modules rated around 1200 V, used in inverters, welders and motor drives; read the sheet itself to confirm topology. It contains the internal circuit, terminal layout, switching and thermal characteristics. Use it to check gate and collector-emitter junctions for shorts and to match a replacement module exactly.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.