This part is a kind of semiconductor called BFG193.

Function of this product has NPN Silicon RF Transistor (For low noise/ high-gain amplifiers up to 2GHz For linear broadband amplifiers).

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

BFG 193 NPN Silicon RF Transistor • For low noise, high-gain amplifiers up to 2GHz • For linear broadband amplifiers • fT = 8GHz F = 1.3dB at 900MHz ESD: Electrostatic discharge sensitive device, observe handling precaution! Type Marking Ordering Code Pin Configuration BFG 193 BFG193 Q62702-F1291 1=E 2=B 3=E 4=C Package SOT-223 Maximum Ratings Parameter Collector-emitter voltage Collector-emitter voltage Collector-base voltage Emitter-base voltage Collector current Base current Total power dissipation Symbol Values 12 20 20 2 80 10 mW 600 150 - 65 ... + 150 - 65 ... + 150 ≤ 105 °C mA Unit V VCEO VCES VCBO VEBO IC IB Ptot Tj TA Tstg 1) TS ≤ 87 °C Junction temperature Ambient temperature Storage temperature Thermal Resistance Junction - soldering point RthJS K/W 1) TS is [ ... ]

BFG193 PDF Datasheet Download