Juried Engineering BC548B BC548 Transistor NPN TO-92 30V 100ma General Purpose Transistors Breadboard-Friendly (Pack of 1): Amazon.com: Industrial & Scientific
Amazon.com: Major Brands BC548B NPN Switch Transistor, TO-92, 500mW, 0.1A, 3 Pin, 4.58 mm H x 3.86 mm W x 4.58 mm L (Pack of 40) : Industrial & Scientific