This part is a kind of semiconductor called BFG92A.

Function of this product has Silicon NPN Planar RF Transistor.

Manufacturers : Vishay Telefunken

Image and pinout :

Some of the text within the PDF file :

BFG92A Vishay Telefunken Silicon NPN Planar RF Transistor Electrostatic sensitive device. Observe precautions for handling. Applications RF amplifier up to GHz range specially for wide band antenna amplifier. Features D High power gain D Low noise figure D High transition frequency 2 1 94 9279 13 579 3 4 BFG92A Marking: P8 Plastic case (SOT 143) 1 = Collector, 2 = Base, 3 = Emitter, 4 = Emitter Absolute Maximum Ratings Tamb = 25_C, unless otherwise specified Parameter Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Total power dissipation Junction temperature Storage temperature range Test Conditions Symbol VCBO VCEO VEBO IC Ptot Tj Tstg Value 20 15 2 30 200 150 –65 to +150 Unit V V V mA mW °C °C Tamb ≤ 60 °C Maximum Thermal Resista [ ... ]

BFG92A PDF Datasheet Download