SS9014 S331 NPN Transistor – (10 pcs)

Where to Use SS9014 Transistors?

The SS9014 is a low signal and low noise NPN transistor with a good hfe value of upto 1000 of high linearity this makes this transistor an ideal choice for designing Audio Frequency (AF) amplifiers or pre-amplifiers. This NPN transistor also has its counter PNP transistor (SS9015) which can be used to design class B amplifier in push-pull configuration. It also has good collector dissipation (power dissipation) of 0.4W to driver speakers of decent rating.

The transistor has a very low collector current of 100mA and hence it is not advised for switching or driving circuits. I have personally found these transistors being used in wireless security cameras and small game consoles where audio pre-amplification is required.

How to use SS9014 Transistors?

The SS9014 is commonly used to build pre-amplifier, but you may design your circuit based on your requirement. To build a pre-amplifier using a transistor we need to select a transistor that is of low signal and low noise with good hfe value and collector dissipation. The SS9014 seems to satisfy us with all those parameters. A typical pre-amplifier circuit using SS9014 is shown below.

The values of resistors R1, R2, R3 and R4 can be calculated by using the value of Vcc, Hfe and Ic. Some useful formulae for calculation is give below

Ib = Ic / hfe                   R1 = 1/2Vcc / .005                     R2 = 1 / (Ic + Ib)

Applications

• AF Pre-amplifiers
• Used as Class B amplifiers
• Low noise stage audio equipments
• Push-Pull Circuits

2D Model of SS9014

If you are designing a PCB or Perf board with this component then the following picture from the Datasheet will be useful to know its package type and dimensions.

SS9014 Equivalent Transistors

KSP06, KSP42, MPSA42, MPSW06

Alternative NPN Transistors

BC549, BC636, BC639, BC547, 2N2369, 2N3055, 2N3904, 2N3906, 2SC5200,2N551

Datasheet available here.