This part is a kind of semiconductor called 2SA921.

Function of this product has Silicon PNP epitaxial planer type(For high breakdown voltage low-noise amplification).

Manufacturers : Panasonic Semiconductor

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Some of the text within the PDF file :

Transistor 2SA921 Silicon PNP epitaxial planer type For high breakdown voltage low-noise amplification Complementary to 2SC1980 5.1±0.2 Unit: mm 5.0±0.2 4.0±0.2 s Features q q High collector to emitter voltage VCEO. Low noise voltage NV. (Ta=25˚C) Ratings –120 –120 –5 –50 –20 250 150 –55 ~ +150 Unit V V V mA mA mW ˚C ˚C s Absolute Maximum Ratings Parameter Collector to base voltage Collector to emitter voltage Emitter to base voltage Peak collector current Collector current Collector power dissipation Junction temperature Storage temperature Symbol VCBO VCEO VEBO ICP IC PC Tj Tstg 13.5±0.5 0.45 –0.1 1.27 +0.2 0.45 –0.1 1.27 +0.2 1 2 3 2.3±0.2 2.54±0.15 1:Emitter 2:Collector 3:Base JEDEC:TO–92 EIAJ:SC–43A s Electrical Characteristics Parameter Col [ ... ]

2SA921 PDF Datasheet Download