2N3904 VS 2N2222 NPN Transistor Differences


2N3904 and 2N2222 are the two most popular NPN bipolar junction transistors in the electronics market. In addition, 2N3904 and 2N2222 are similar in appearance.

Therefore, some people may have questions: Why is 2N3904 so popular and 2N2222 is not always used? If you are curious about which one to use, or which is better, which is better? In this blog, we will compare the chip characteristics and pin diagrams of these two transistors.

Comparing transistors is not extensive, because only a few useful parameters are important

Differences between 2N3904 VS 2N2222


Both the 2N3904 and 2N2222 are identical in terms of handling collector-to-emitter voltages, and both can handle voltages of up to 40V. In simple terms, this effectively means that 40V is the maximum amount of voltage that the transistor can handle minus the voltage drop across the load connected to the collector. For example, suppose we apply 70V to the collector of the transistor and the load will consume 20V, this means that the remaining voltage will fall on the transistor which will be 70V - 20V = 50V. this would not be acceptable because it exceeds the maximum VCEO. since the 2N3904 and 2N2222 have the same maximum VCEO voltage, there is no difference in this regard.


Where they differ is that the 2N2222 can handle larger operating collector currents. Collector current is the amplified current that flows from the emitter to the collector to power the load that may be connected to the transistor. 2N3904 can handle up to 200mA (milliamperes) of current flowing from the emitter to the collector terminal. A 2N2222 can handle up to 5 times that amount of current, as it can handle up to 1A (amps) of current flow from emitter to collector to power a load.

2N3904 NPN Transistor Basics

The 2N3904 is a common NPN bipolar junction transistor used for general purpose low power amplification or switching applications. It is designed for low current and low power, medium voltage operation at moderate speeds.

2N2222 NPN Transistor Basics

The 2N2222 is a common NPN bipolar junction transistor (BJT) used for general purpose low power amplification or switching applications. It is designed for low to medium current, low power, and medium voltage operation at moderate speeds. It originally used TO-18 metal cans as shown in the figure.

The 2N2222 is considered a very common transistor and is used as an example of an NPN transistor. It is often used as a small signal transistor and it is still a small general purpose transistor that endures.
Dob 13 april 2021, 2:09
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