The BU406A8 is a RoHS-compliant TO-220-3 transistor manufactured by Huajing. It is an NPN/PNP transistor consisting of a three-pin package, with a collector, base, and emitter, and capable of up to 6A peak collector current, 27V maximum breakdown voltage and 80V maximum reliable operating voltage. This component is an ideal choice for cost-effective and reliable power applications, and is widely used in areas such as automotive, motor control, and telecoms.