PDF reference for the 2SC3596, sized at 119 KB and indexed with schematics although it describes a single semiconductor. The JIS 2SC prefix denotes NPN bipolar transistors intended for high-frequency circuits. Look here for the absolute maximum ratings, electrical characteristics table and package drawing, which together tell you how to test the part in or out of circuit and what replacement will survive. The name gives no further detail. Double-check the marking and case style against the sheet, since pin orders vary between packages.
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.