Reference PDF of 136 KB for the 2SA1406 transistor, catalogued among schematics. The 2SA prefix, by JIS convention, marks a PNP device in the high-frequency category. The file name does not state the manufacturer, package or grade. Use the document to confirm which pin is base, collector and emitter, to see the outline dimensions and to note absolute maximum ratings, which is useful when testing a suspected failed transistor with a diode-mode meter or selecting a substitute.
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.