Datasheet PDF, 24.1 KB, for the 2SB772L variant from UTC, likely Unisonic Technologies. Under JIS naming the 2SB prefix denotes a PNP transistor intended for low-frequency and power use. The L suffix is not explained by the name, so read the sheet itself to see which package or variant it covers. It is listed as a schematic but describes a single component. Use it to confirm pin assignment, voltage and current limits and gain ranks before fitting a replacement part.
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.