Part documentation for the 2SB1407 transistor in a compact 42.0 KB PDF. Only the part number appears in the file name, so no maker, package variant or revision can be confirmed from it. In the JIS scheme the 2SB family consists of PNP transistors for low-frequency applications. The practical value lies in confirming pinout and package before rework, reading maximum ratings, and comparing gain classes when sourcing a replacement. Because the prefix is often omitted on the case, look for B1407 on the part itself.
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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