The TYN616 is a medium power SCR from ST Microelectronics that can switch loads of up to 16A and withstand up to 600V. It is used for medium power switching applications.
The BD140 is a PNP Epitaxial Planar Transistor that is mounted in the SOT-32 plastic package. They are designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits.
The MJE13001 is a common BJT NPN switching transistor that is found in lamp ballasts and (cheap) phone chargers because of its high breakdown voltage and current capacity.