2N3904 NPN General Propose Transistor: Amazon.com: Industrial & Scientific
Amazon.com: Todiys New 12Pcs for 2N3055 2N3055G 2N3055H to-3 NPN High Power Transistor 2N3055B : Industrial & Scientific
Major Brands TIP102-VP Darlington NPN Transistor, 100 Volt, 8 Amp, 3-Pin, TO-220 Amp B Rail, 9.28 mm H x 4.82 mm W x 10.28 mm L (Pack of 10): Amazon.com: Industrial & Scientific