The MMBT3906 2A SOT-23 Bipolar Transistor is a NPN Silicon Epitaxial Planar Transistor manufactured by FOSAN. It features a high current gain (hFE) of 300 ~ 600, and a low saturation voltage VCE (sat) of 0.2V (max) at a collector current IC of 600mA. It is enclosed in a SOT-23 package, and is RoHS compliant, so it is free of lead, halogens and other hazardous substances. It is primarily used as a general purpose amplifier or switching application. It features a low voltage operation from 2V to 6V, low noise, and high current gain.