The S9013 transistor is an NPN transistor with excellent gain capability so that you can use it in amplifier application. The maximum DC gain it can give is 150 and it can have transistor frequency is 140MHz. It can have maximum collector current of 500mA and maximum collector power dissipation of 625mW. S9013 Transistor Specifications PNP Transistor with low noise Maximum DC Current Gain: 150 Collector Emitter Saturation Voltage: 0.25V Base-Emitter Saturation Voltage: 1.0V Transition Frequency: 140MHz Excellent Linear Gain Range