S9015 is a well-known PNP silicon BJT transistor. This transistor is mainly designed for low gain signals amplification. Normally when a low gain signal is amplified to high gain then the noise with the signal is also get amplified but this transistor possess low noise feature which filters noise from the amplified signal and hence you will get a low noise and high gain signal at the output. The max collector dissipation of the transistor is 400mW that is enough to drive a small 2 to 3 inch 4Ohms or 8Ohms speaker directly if any small few milliwatt input signal is provided. Other than these uses it can also be used as a switch to drive loads under -100mA. The transition frequency is 150MHz due which it can also be used in RF circuits under 150 MHz frequency spectrum.
Package Type: TO-92
Transistor Type: PNP
Max Collector Current(IC): –100mA
Max Collector-Emitter Voltage (VCE): –45V
Max Collector-Base Voltage (VCB): –50V
Max Emitter-Base Voltage (VEBO): –5V
Max Collector Dissipation (Pc): 400 miliWatt
Max Transition Frequency (fT): 150 MHz
Minimum & Maximum DC Current Gain (hFE): 60 – 1000
Max Storage & Operating temperature Should Be: -55 to +150 Centigrade