The TIP140, TIP141 and TIP142 are 100V 10A 125W Silicon Epitaxial-Base NPN power transistors in monolithic Darlington configuration, mounted in TO-218 Package.
The TPC8214H, TPC8214, TPC-8214, 8214 is a N-Channel MOSFET TOSHIBA Field Effect Transistor Silicon N-Channel MOS Type (Ultra-High-Speed U-MOS)-SOP-8P.
The 2SC3198 is a 60V 150mA 400mW NPN General Purpose Transistor TO-92 Package. This NPN Silicon Epitaxial Planar Transistor for switching and AF amplifier applications.
The BC337 is an NPN transistor with a maximum gain of 630, commonly used in low power audio applications. It can also switch loads up to 45V and 800mA hence also used as general purpose transistor.