The ON Semiconductor 2N2222A is a widely used NPN bipolar junction transistor (BJT) designed for general-purpose switching and amplification applications. Encapsulated in a TO-92 package, it offers a compact form factor suitable for various electronic projects. With a maximum collector-emitter voltage of 40V and a collector current of up to 800mA, it is versatile enough for both low and moderate power circuits. The transistor's low saturation voltage and high current gain make it an excellent choice for hobbyists, engineers, and students working on prototypes and small-scale electronics.