Datasheet for the 2SD882 NPN transistor in a 165 KB PDF; the file name does not state which manufacturer issued it, unlike the UTC versions in the same set. The 2SD designation follows the Japanese JIS scheme for NPN low-frequency transistors. Expect pinout drawings, absolute maximum ratings, characteristic curves and package outline, useful when testing the part with a meter or choosing a replacement. Because ratings and gain classes can differ slightly between makers, match the source to the logo on the component when possible.
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.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.