This part is a kind of semiconductor called BFR93.

Function of this product has Silicon NPN Planar RF Transistor.

Manufacturers : TEMIC Semiconductors

Image and pinout :

Some of the text within the PDF file :

BFR93/BFR93R Silicon NPN Planar RF Transistor 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 1 1 2 3 94 9280 3 2 95 10527 BFR93 Marking: R1 Plastic case (SOT 23) 1= Collector; 2= Base; 3= Emitter BFR93R Marking: R4 Plastic case (SOT 23) 1= Collector; 2= Base; 3= Emitter Absolute Maximum Ratings Parameters Collector-base voltage Collector-emitter voltage Emitter-base voltage Collector current Total power dissipation Tamb ≤ 60°C Junction temperature Storage temperature range Symbol VCBO VCEO VEBO IC Ptot Tj Tstg Value 20 12 2 40 200 150 –65 to +150 Unit V V V mA mW °C °C Maximum Thermal Resistance Parameters Junction ambient Symbol RthJA Value 450 Unit K/W TELEFU [ ... ]

BFR93 PDF Datasheet Download