2N2222A屬于分立半導(dǎo)體產(chǎn)品的晶體管-雙極性晶體管（BJT）-單個。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的2N2222A晶體管 - 雙極性晶體管（BJT）- 單個分立式雙極結(jié)型晶體管 (BJT) 通常在音頻、無線電及其他應(yīng)用中用于構(gòu)建模擬信號放大功能。作為大批量生產(chǎn)的第一批半導(dǎo)體器件之一，對于涉及高頻開關(guān)和在大電流或高電壓下工作的應(yīng)用而言，它們的特性相比某些器件類型不占優(yōu)勢，但對于需要以極小的噪聲和失真構(gòu)建模擬信號的應(yīng)用而言，它們?nèi)匀皇鞘走x技術(shù)。

The 2N2218, 2N2219, 2N2221 and 2N2222 are silicon planar epitaxial NPN transistors in Jedec TO-39 (for 2N2218 and 2N2219) and in Jedec TO-18 (for 2N2221 and 2N2222) metal cases. They are designed for high-speed switching applications at collector currents up to 500 mA, and feature useful current gain over a wide range of collector current, low leakage currents and low saturation voltages.