BD139 BD140 datasheet
BD140 are flagship flat-panel transistors that are mounted in SOT-32 plastic packages. The device is designed for audio amplifiers and drivers using complementary or quasi-supplementary circuits. The NPN types are BD135 and BD139, while the complementary PNP types are BD136 and BD140.
Used in medium power linear and switching applications.
BD137 and BD139 complement
BD138 and BD140, respectively.