MMBT8050 and MMBT8550 are SOT-23 plastic package. There are three terminals which represents base, emitter and collector. For switching and amplifier applications, especially suitable for AF-driver stages and low power output stages.
They are a low voltage high current small signal transistor, designed for class B push-pull audio amplifier and general purpose applications. Collector current up to 600mA; Collector-emitter voltage up to 25V.The MMBT8550 transistor is subdivided into two groups C and D according to its DC current gain.
NPN Silicon Epitaxial Planar Transistors MMBT8050 Datasheet Download:
PNP Silicon Epitaxial Planar Transistors MMBT8550 Datasheet Download: