The BC817-40 is a NPN transistor manufactured by AnBon and is RoHS compliant. It has an SOT-23 form factor, making it a compact package for industrial applications. It is an ideal choice for applications that require low noise, low current consumption, and high circuit linearity. The BC817-40 has a high current gain bandwidth product of 100 MHz, a DC current gain (hFE) of 100-300, a maximum Collector-Emitter Voltage (VCE) of 45V, a maximum Collector-Base Voltage (VCBO) of 80V, and a maximum Emitter-Base Voltage (VEBO) of 5V. It is rated to operate at a maximum collector current of 500mA and a power dissipation of 625mW. The BC817-40’s maximum frequency of transition is 1Mhz and it is a popular choice for amplifying, switching, and low signal applications.