This part is a kind of semiconductor called BFN20.

Function of this product has NPN Silicon High-Voltage Transistor (Suitable for video output stages in TV sets and switching power supplies High breakdown voltage).

Manufacturers : Siemens Semiconductor Group

Image and pinout :

Some of the text within the PDF file :

NPN Silicon High-Voltage Transistor q q q q q BFN 20 Suitable for video output stages in TV sets and switching power supplies High breakdown voltage Low collector-emitter saturation voltage Low capacitance Complementary type: BFN 21 (PNP) Type BFN 20 Marking DC Ordering Code (tape and reel) Q62702-F1058 Pin Configuration 1 2 3 B C E Package1) SOT-89 Maximum Ratings Parameter Collector-emitter voltage Collector-base voltage Collector-emitter voltage, RBE = 2.7 kΩ Emitter-base voltage Collector current Peak collector current Total power dissipation, TS = 120 ˚C Junction temperature Storage temperature range Thermal Resistance Junction - ambient2) Junction - soldering point Rth JA Rth JS ≤ ≤ Symbol VCE0 VCB0 VCER VEB0 IC ICM Ptot Tj Tstg Values 300 300 300 5 50 100 1 150 – [ ... ]

BFN20 PDF Datasheet Download