S9015 PNP Transistor

• 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 4 ohms or 8 ohms 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.

Replacement and Equivalent:

• BC557C, NTE2672, BC327−40, BC636, MPSA18,  2N2907, S8550, 2N4403, BC527, SS9012, (The replacement and equivalent transistor shown here are the nearest possible replacement for SS9015. But the pin configuration of these transistors may different from the SS9015 therefore check pinout of the transistor before replacing in a circuit.)
• SS9015 can be used for variety of applications like audio preamplification, audio amplification, amplifying any low gain signals to high gain, etc. Moreover it can also be used as a switch to drive relays, LEDs, high power transistors etc. This transistor can be used or wired same like any other BJT transistor.

�Applications:

• Audio Preamplifiers
• Audio Amplification Stages
• Signal Amplifier
• Hearing Aids
• Sensor Circuits
• Switching loads under 100mA
• Darlington Pairs