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Basics of 2N2222

Hello friends, I hope you all are doing great. In today's tutorial, I am going to share a new electronic component named as 2N2222. I am gonna discuss all the basic details of this transistor. It's an NPN Bipolar junction transistor and has a wide range of applications associated with it.

Here's the 2N2222 Pinout Diagram and then I will start the basic details of it:

Basics of 2N2222

  • 2N2222 is an NPN transistor, which means it has a single P doped layer embedded between two N doped layers.
  • It's a Bipolar junction transistor abbreviated as BJT.
  • It has three terminals named as:
    • Emitter.
    • Collector.
    • Base.
  • It's a current controlled transistor.
  • It has a Collector current of 800 mA.
  • Power Dissipation of 2N2222 is 500mW.
  • It can operate between -65 C to 200 C temperature.
  • Collector base voltage of 2n2222 is 60.
  • Collector Emitter Voltage of 2n2222 is 30.
  • Emitter Base voltage of 2n2222 is 5.

Working of 2N2222

  • As I have mentioned before, it's a current controlled transistor.
  • So, a small current at the base terminal is used to drive high current between the other two terminals.
  • It is used for switching purposes because of its fast response time.

Applications of 2N2222

It has a wide range of applications and I am gonna discuss few of them here:

  • It is used for current amplification.
  • It is also used as a switch to turn ON or OFF any appliances automatically.
  • Because of its fast response time, it can be used for pulse width modulation.
  • It is mostly used in embedded and automation projects.

So, that was all about this Bipolar Junction transistor named as 2N2222. If you guys get into any trouble while working on the transistor then ask in comments and I will try my best to resolve them. Will meet you guys in the next tutorial. Till then take care and have fun !!! :)

Technopreneur :P

10 Sep 2018, 14:15


September 24, 2019 07:37

hi i have some questions regarding some circuit, is it possible to email you ?

0 Votes

September 17, 2018 09:00

I must have used a million of these in prototypes. Very hard to blow up. Even if you're switching over 1A! Only the metal cased versions, mind you. The plastic packages pop like balloons!

September 18, 2018 08:23

@LStacey Thanks for mentioning that out ... (Y)

September 14, 2018 09:39

This used to be my universal NPN transistor for many circuits. Some packages allowed 1A switching which was great for such a small part. Have used this with the good old 2N2907 as a complimentary output pair for a small amplifier on many an occasion in the past.

September 17, 2018 09:00

2N2222, a new electronic component - not true! I've been using them since the eighties.
As to the discussion, where is it?
Any fool can regurgitate the bullet-points of a datasheet. THE two key items of initial interest are absent i.e. gain and bandwidth. These along with power rating, max. Ic and max. Vce are needed for the selection process.

0 Votes

September 18, 2018 08:23

@meandray I meant I am gonna share a new tutorial on electronic components, i kind of use such starting lines sorry for the confussion. I have also added a link which will give you a more detailed description of this IC. Please check that one out as well. Here its a basic introduction to let people know what is 2n2222. Have a good day. :)