MMBTA92 is an NPN general-purpose transistor manufactured by ON Semiconductor. It has a maximum current rating of 1 Amp, a maximum power dissipation of 625 mW, and a maximum voltage rating of 40 Volts. This transistor is typically used as a switch, amplifier, or for logic level conversion applications. It is designed with a low noise figure, which makes it suitable for low-level signal applications.