The transistor 2N2222 is one of the important and very commonly used transistor type which finds numerous switching application in electronic circuts.
The main feature of this transistor is its ability to handle relatively high magnitudes of currents compared to other simiar small signal types of transistors.
Typically, a 2N2222 transistor is able to switch 800 mA of load current through it, which may be considered quite high compared to the miniature size owned by these devices.
High current switching capability also makes this device ideally suited for linear amplifier applications.
1x 2N2222 NPN switching transistor