Transistor 2N4403 pinout configuration, equivalent, Specs & Details

This post explains Transistor 2N4403 pinout configuration, equivalent, specs, how and where to use this transistor and other details.


Transistor 2N4403 pinout configuration, equivalent, Specs & Details


Features / technical specifications:

  • Package Type: TO-92
  • Transistor Type: PNP
  • Max Collector Current(IC): 600mA
  • Max Collector-Emitter Voltage (VCE): 40V
  • Max Collector-Base Voltage (VCB): 40V
  • Max Emitter-Base Voltage (VEBO): 5V
  • Max Collector Dissipation (Pc):  625 miliWatt
  • Max Transition Frequency (fT): 200 MHz
  • Minimum & Maximum DC Current Gain (hFE): 100 – 300
  • Max Storage & Operating temperature Should Be: -65 to +150 Centigrade


NPN Complementary:

NPN Complementary 2N4401


Replacement and Equivalent:

SS9012, 2N3906, 2N2907, BC528, ZTX550, MPS2907, PN2905, BC878, BC880 (The Pin Configuration of the equivalent transistors shown here may different from 2N4403, therefore it is suggested to check pin configuration before replacing in the circuit)


2N4403 Transistor Explained / Description:

2N4403 is a widely used PNP general purpose transistor. Due to its good technical features it is a hobbyist’s favorite transistor for their general purpose applications. Apart from that it can be used in wide variety of electronic applications like switching and amplification. The max collector current of the transistor is 600mA that is a quite good value in its size. With 600mA collector current it can be used to control variety of loads in electronic circuits.

Moreover the transistor is also having Max collector dissipation of 625miliWatt and max DC current gain of 300 these are also some good value in this size package to use it as a small amplification or preamplification purposes.


Where & How to Use 2N4403 Transistor:

The 2N4403 transistor can be used in many applications for example it can be used to switch ON and OFF relay switches, switch ON and OFF different types of LEDs, Controlling Mosfet and other high power transistors in an electronic circuit, controlling ICs or an entire circuit under 600mA load. Moreover this transistor can also be used as a small amplifier at the output of the circuit to directly drive a speaker or as an amplifier in many audio related circuits. It can also be used as a microphone preamplifier or as a preamplifier for many small audio signals. It can also be used to amplify any type of small signal.



General purpose switching applications

Audio amplification & preamplification

Any Signal amplification

Sensor Circuits


How to Get Long Term Performance in a Circuit:

If you want that transistor to perform long term in your circuit then it is essential to not go above the values define here. It is also suggested to always stay some numbers below the maximum value for safety and long term performance. Do not drive load more than 600mA with this transistor, always operate the load under 40V DC. Use a suitable base resistor with the transistor; always check the pin configuration before placing in the circuit. Do not store or operate the transistor in temperature below -55 centigrade and above +150 centigrade.

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