PDF reference of 188 KB for the 2SA1680, a Japanese-registered transistor; the name offers no manufacturer, package or revision details. Under JIS conventions, 2SA stands for PNP transistors intended for high-frequency applications. Consult it to confirm pinout before removing or fitting the part, to read absolute maximum ratings and gain ranges, and to decide whether a cross-reference is acceptable. The relatively large file size suggests characteristic graphs are included alongside the tables.
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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