The MMDT3904 with SOT-363 Bipolar Transistors - BJT ROHS is a surface mount transistor, manufactured by MSKSEMI. It is a low-noise, low capacitance NPN transistor that is designed for use in a wide variety of switching and linear applications. The MMDT3904 has an RON of 15 Ohms and a BVceo of -20V. It also has a power dissipation of 500mW and an HFE of 40-180, making it well-suited for motor control, LED control, power supply, audio, and communication applications. The SOT-363 packaging allows for a small footprint and improved thermal performance. Finally, the MMDT3904 meets the Restriction of Hazardous Substances (RoHS) environmental standards.