PDF of 122 KB covering the 40MT140P, indexed under schematics. Like its siblings in the MT series, it is a power module datasheet, most likely for a bridge rectifier arrangement, with the 140 code indicating a lower voltage class than the 160 version. Consult the internal schematic and terminal drawing when measuring diode junctions on a suspected faulty module, and verify that the replacement matches both the voltage grade and the mechanical footprint for the heatsink mounting.
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.