Short 41.5 KB PDF for the 2SB1050, with an _E suffix whose meaning the name does not explain, possibly a language or edition tag. The JIS prefix 2SB identifies a PNP transistor designed for low-frequency use. Although stored under schematics, treat it as a datasheet giving ratings, characteristics and package details. It helps when measuring a suspect transistor, identifying leads on an unfamiliar footprint, or comparing candidate substitutes for polarity, voltage, current and power capability.
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.