MMBT3904 is a part number for a common NPN bipolar junction transistor (BJT). It is a small signal transistor that is commonly used in a wide range of electronic applications.
The MMBT3904 transistor is designed to handle a maximum collector current of 200mA and a maximum collector-emitter voltage of 40V. It has a low noise figure and a high current gain, making it well-suited for use in audio amplifiers, small signal amplifiers, and switching applications.
The MMBT3904 transistor is housed in a SOT-23 package, which is a small, surface-mount package that allows for easy mounting on printed circuit boards. This package is widely used and can be found in many electronic devices.
One of the key features of the MMBT3904 transistor is its fast switching speed and its ability to operate at high frequencies, making it suitable for use in RF and microwave circuits. It also has a low base-emitter voltage, which means that it can be easily driven by low-level signals.
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