The MMDT3904-7-F is a Transistor Bipolar - BJT 40V 200mW manufactured by Diodes Incorporated. It is an NPN general purpose amplifier and switch with a maximum Vce of 40V and maximum power dissipation of 200mW. This part has a single Common Base configuration, which makes it suitable for use in a variety of applications, including audio amplifiers, switching circuits, and ultra-low power consumption designs. The lead-free, RoHS-compatible construction ensures compatibility with the latest environmental regulations.