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
Bipolar (BJT) Single Transistor, NPN, 45 V, 200 MHz, 40 W, 4 A, 750 hFE: Amazon.com: Industrial & Scientific