2N3904 NPN Small Signal Transistor: Electronics: Amazon.com: Industrial & Scientific
Neoteck Auto Ranging Digital Multimeter AC/DC Voltage Current Ohm Capacitance Frequency Diode Transistor Audible Continuity, Multi Tester with Backlit LCD - - Amazon.com
Amazon.com: 100 x 2N2222 NPN TO-92 Plastic-Encapsulate Power Transistors 75V 600mA : Industrial & Scientific
IIVVERR TOP247YN Family Extended Power Off Line Switcher Transistor (TOP247YN Familia Extendido Interruptor fuera de línea interruptor de conmutador - - Amazon.com