The MMBT3904T with SOT-523 Bipolar Transistors - BJT ROHS manufactured by Doeshare is a single-stage, bipolar, NPN transistor in a surface mount package. It has a collector/drain current of up to 250mA, and a maximum voltage of 40V. The package provides superior electrical characteristics, including low noise, low collector-to-base capacitance, and high current gain. The transistor is ideal for medium-power switching and linear applications, and is compliant to the RoHS (Restriction of Hazardous Substances) standards.