WEE Technology Company Limited
Manufacturer of Surface Mount (SMD) and Through Hole (DIP) Diodes & Rectifiers

BC846, BC847, BC848, BC849, BC850, BC856, BC857, BC858, BC859, BC860  Series General Purpose Transistors NPN Silicon http://weetcl.com

These transistors are designed for general purpose amplifier applications. They are housed in the TO-236/SOT-323 which is COLLECTOR designed for low power surface mount SMD applications. 

WEET NPN/PNP Epitaxial Silicon Transistor Mainly Features:

BC856 THRU BC860, BC846 THRU BC850 Series types are NPN Silicon Transistors manufactured by the epitaxial planar process, epoxy molded in a SUPERminiTM surface mount package, designed for general purpose switching and amplifier applications.

https://www.weetcl.com/pdf/WEET_Transistors_SOT-23_BC846_THRU_BC850.pdf

WEE Technology PNP Silicon Epitaxial Planar Transistors SOT-23(TO-236) Small Transistors (BC846A, BC846B, BC846C, BC847A, BC847B, BC847C, BC848A, BC848B, BC848C, BC849A, BC849B, BC849C, BC850A, BC850B, BC850C)

https://www.weetcl.com/pdf/WEET_Transistors_SOT-23_BC856_THRU_BC860.pdf

WEE Technology PNP Silicon Epitaxial Planar Transistors SOT-23(TO-236) Small Transistors (BC856A, BC856B, BC856C, BC857A, BC857B, BC857C, BC858A, BC858B, BC858C, BC859A, BC859B, BC859C, BC860A, BC860B, BC860C)

https://www.weetcl.com/pdf/WEET_Transistors_SOT-23_Pacakge_Outline.pdf