2N3904 NPN Small Signal Transistor: Electronics: Amazon.com: Industrial & Scientific
Fairchild Semiconductor General Purpose NPN Thru-Hole Transistor TO-92 AMMO (Bag of 10): Amazon.com: Industrial & Scientific
Amazon.com: 5 pcs of TIP29 NPN 1A 40V POWER TRANSISTOR TO-220 : Industrial & Scientific
NEW LON0167 IRFIB7N50L High Voltage Semiconductor 3 Pin PNP Power Transistor TO-220(IRFIB7N50L Hochspannungshalbleiter 3 Pin PNP-Leistungstransistor TO-220 - - Amazon.com
Bridgold 10pcs MJE3055T MJE3055 NPN Bipolar (BJT) Single Transistor,10 A/60V,is Designed for General Purpose of Amplifier andswitching Applications: Amazon.com: Industrial & Scientific
Major Brands TIP120. Transistor, Darlington, NPN, 60 Volt, 5 Amp, 3-Pin, 3+ Tab, TO-220, AmpB, Rail (Pack of 15): Amazon.com: Industrial & Scientific