STMicroelectronics 2N2222A (TO-18)

The STMicroelectronics 2N2222A (TO-18) is a bipolar junction transistor (BJT) that is widely used in electronic circuits for amplification and switching applications. It has a maximum collector current rating of 800mA and a maximum collector-emitter voltage of 30V. This transistor has three terminals, namely the emitter, the base, and the collector. The base is the control terminal, whose voltage determines the amount of current that flows through the transistor. The emitter is the current source, while the collector is the current sink.

The 2N2222A transistor exhibits excellent low signal characteristics such as high gain, low noise, and low distortion, making it suitable for use in audio and radio frequency (RF) circuits. It is also commonly used in switching circuits due to its fast switching speed and low saturation voltage. The TO-18 package is a through-hole package with a diameter of 4.45mm and a height of 9.53mm. It is a reliable, cost-effective transistor that is widely used in various applications such as signal amplification, audio pre-amplifiers, and switching circuits, among others