Reference sheet for the 2SA1391, supplied as a 237 KB PDF and listed among schematics. Following JIS convention, the 2SA prefix means a PNP transistor for high-frequency use. The name includes no manufacturer, rank or package information. In practice this document helps a technician identify the leads of the part, check whether circuit voltages stay inside its ratings, and compare characteristics when sourcing a replacement, with pin order confirmed against the PCB footprint.
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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