The BCP8050 is suited for the output stage of audio, voltage regulator, and relay driver. MARKING Y1 SOT-89 4 123 A EC CLASSIFICATION OF hFE Product Rank BCP8050-C Range 120~200 BCP8050-D 160~300 PACKAGE INFORMATION Package MPQ SOT-89 1K Leader Size 7’ inch 1 Base BD Collector 24 3.