Component datasheet for the 2SD2137, a part from the Japanese 2SD series, which designates NPN bipolar transistors intended for low-frequency use. The compact 57 KB PDF typically contains collector-emitter voltage, collector current, gain ranges, power dissipation and the case drawing. It helps a repair technician identify base, collector and emitter pins, test a suspect transistor with a meter, and choose an equivalent with comparable gain and ratings when the original cannot be obtained.
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.