The 2N2222 NPN Transistor is a widely used general-purpose bipolar junction transistor (BJT) designed for switching and low-power amplification applications. It is commonly used in Arduino and microcontroller projects, LED drivers, relay control circuits, signal amplification, and other electronic switching applications. The compact TO-92 package makes it easy to use on breadboards and through-hole PCBs. Featured by Famephase Electronic Accessories.