's family of bipolar transistors, the MMBT2222A is a general purpose product designed for switching and amplifier applications. It is a NPN silicon epitaxial planar transistor with a maximum collector current of 500 mA, a maximum collector-base voltage of 60 V, and a maximum collector-emitter voltage of 40 V. It has a DC current gain (hFE) of up to 200. The switching time is typically less than 30 ns, with a minimum turn-on voltage of 1 V. It is used in low-power amplifiers, current controls, line drivers, inverters, and logic drivers. It is also suitable for general purpose power switches and audio amplifiers. It is offered in a standard SOT-23 package, which makes it suitable for through-hole mounting or surface mount technology. The MMBT2222A is among the most popular types of bipolar transistors for switching applications, due to its reliable performance, low cost, and excellent availability.