The FOSAN BC856B 3B with SOT-23 is a type of bipolar transistor, manufactured by FOSAN, in a SOT-23 surface-mount package. This is a three-terminal, low-noise, low saturation voltage NPN general purpose amplifier, suitable for a wide range of applications such as active filter, audio amplifiers, preamplifier, and switching. It has a high current gain bandwidth (hfe) of 200MHz at a collector current of 1mA, along with a DC current gain (hFE) of 200min/50max. The device is RoHS compliant, Lead (Pb)-free, halogen-free, and exceeds most environmental and electrical standards for use in a wide variety of applications.