2N2222A NPN Bipolar Transistor, TO-92 Package (3-Piece Pack)

The 2N2222 has been a go-to general-purpose NPN transistor for decades, used anywhere a circuit needs to switch a small load on and off under digital control or provide basic small-signal amplification. This TO-92 plastic-packaged version is the easiest to work with on a breadboard, with three legs that push straight into standard breadboard holes rather than needing the careful handling a metal-can TO-18 package calls for. Builders use it to drive small relays, LEDs beyond a microcontroller pin's current limit, buzzers, and small motors from a digital signal, or as a basic amplifying stage in simple analog circuits, making it one of the first transistors most electronics learners end up reaching for.