A94 is a PNP type transistor manufactured by the company Haolin. It has a current rating of 200mA and a voltage rating of 400V, and it is housed in a TO-92 RoHS package. It is widely used in various applications such as switching, amplifying, and controlling. The transistor has three terminals, the base, collector, and emitter. It can be used for switching loads like solenoids, motors, and relays. It is also used to amplify signals for audio or RF applications.