The MBT3904DW1T1G is a dual NPN Bipolar Transistor manufactured by ON Semiconductor. It has two N-P-N transistors in one package, both with a maximum continuous collector current of 200mA and a maximum voltage of 60V. It is a Switching Transistor with a high DC current gain (hFE) which allows for fast switching times and wide positive current-gain bandwidth product. The MBT3904DW1T1G has a low collector-emitter saturation voltage, making it suitable for low voltage applications. This transistor is suitable for use in general purpose high switching applications. It can also be used in switching power supplies, motor control, and other high-voltage circuits.