This part is a kind of semiconductor called BCW71.

Function of this product has NPN General Purpose Amplifier.

Manufacturers : GME

Image and pinout :

Some of the text within the PDF file :

NPN General Purpose Amplifier FEATURES z Super Mini Packaged Transistor for Hybrid Circuits. Pb Lead-free APPLICATIONS z General purpose switching and amplification. z For Complementary with PNP Type BCW69/70. Production specification BCW71/BCW72 ORDERING INFORMATION Type No. Marking BCW71 BCW72 K1 K2 SOT-23 Package Code SOT-23 SOT-23 MAXIMUM RATING @ Ta=25℃ unless otherwise specified Symbol Parameter Value VCBO VCEO VEBO IC PD Tj,Tstg Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Collector Current -Continuous Total power Dissipation Junction and Storage Temperature 50 45 5 100 350 -65 to +150 Unit V V V mA mW ℃ C160 Rev.A www.gmicroelec.com 1 Production specification NPN General Purpose Amplifier BCW71/BCW72 ELECTRICAL CHARACTERISTICS @ [ ... ]

BCW71 PDF Datasheet Download