2SC1971 PDF datasheet can download.
This product has NPN EPITAXIAL PLANAR TYPE(for RF power amplifiers on VHF band Mobile radio applications) functions.
This is one of the semiconductor types. This part name is 2SC1971.
Manufacturers of the product is Mitsubishi Electric Semiconductor.
Image and pinout :
Some of the text files within the PDF file
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Please refer to the file for details.