S9014 Bipolar NPN Transistor

1.00 EGP

SKU: T_S9014 Categories:

S9014 Transistor Pinout Configuration

Pin No. Pin Name Description
1 Emitter Current Drains out through emitter, normally connected to ground
2 Base Controls the biasing of transistor, Used to turn ON or OFF the transistor
3 Collector Current flows in through collector, normally connected to load



  • Pre-Amplifier, Low Level, Low Noise NPN Transistor
  • Current Gain (hFE), 60 to 1000 (good linearity)
  • Continuous Collector current (IC) is 100mA
  • Collector-Emitter voltage (VCEO) is 45 V
  • Collector-Base voltage (VCB0) is 50V
  • Emitter Base Voltage (VBE0) is 5V
  • Transition Frequency 150MHz
  • Available in To-92 Package


Note: Complete Technical Details can be found at the datasheet given at the end of this page.

Complementary PNP for S9014



S9014 Equivalent Transistors

KSP06, KSP42, MPSA42, MPSW06

Alternative NPN Transistors

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


Where to Use S9014 Transistors?

The S9014 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 S9014 Transistors?

The S9014 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 S9014 seems to satisfy us with all those parameters. A typical pre-amplifier circuit using S9014 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)

You can find the design guidelines for building your own circuit in the given link.



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


2D Model of S9014

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.

14 Days Warranty

This item is covered with a standard warranty of 14 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Micro Ohm customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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