2N4401 vs 2N2222: Are They Interchangeable?
The 2N4401 is an NPN transistor, and The 2N2222 is a typical NPN bipolar junction transistor (BJT). The article is going to introduce the details and differences of both gadgets.

The 2N4401 is an NPN transistor, and The 2N2222 is a typical NPN bipolar junction transistor (BJT). The  article is going to introduce the details and differences of both gadgets.

This short video introduces the application of 2N4401 transistor in LED.

Amazing LED flasher using 2N4401 transistor | @Electronic Projects | #22 | Circuiter Tamil


  • 2N4401 Overview

  • 2N2222 Overview

  • 2N4401 Pinout

  • 2N2222 Pinout

  • 2N4401 And 2N2222 CAD Model

  • Equivalents Of 2N2222

  • Applications Of 2N4401

  • Applications Of 2N2222

  • 2N4401 Manufacturer

  • 2N2222 Manufacturer

  • The Major Differences Of 2N4401 And 2N2222

2N4401 Overview

The 2N4401 is an NPN transistor, the collector and emitter will be open (reverse biased) when the base pin is held at ground and closed (forward-biased) when a signal is applied to the base pin. The gain value hfe of 2N4401 is 500, which determines the transistor's amplification capacity. Because the maximum current that can flow through the Collector pin is 800mA, we cannot connect loads that use more than 500mA to this transistor. To bias a transistor, we must feed current to the base pin; this current (IB) should be kept to a maximum of 5mA.


2N2222 Overview

The 2N2222 is a typical NPN bipolar junction transistor (BJT) used in low-power amplifying or switching applications. It is intended for low to medium current, low power, medium voltage, and relatively fast operation. It was originally created in the TO-18 metal container shown in the image.


2N4401 Pinout

2N4401 pinout.jpg

2N2222 Pinout

2N2222 PINOUT.jpg

2N4401 And 2N2222 CAD Model










3D Model


3D Model.jpg

Equivalents Of 2N2222

2N2907(PNP),2N3904(PNP),2N3906 (PNP), BC637, S9014, BC148, 2N4403,MPS2222, PN2222, KN2222, KTN2222.


Applications Of 2N4401

1. Can be used to switch high current loads (up to 500mA).

2. It is also useful in a variety of switching applications.

3.Motor speed control

4.Circuits for inverters and other rectifiers

5. In Darlington Pair, it can be used. 


Applications Of 2N2222

This 2N2222 NPN Transistor could be utilized in loads requiring more than 800mA of current, such as motor drive circuits, variable frequency drives (VFD), and dc inverter and rectifier circuits. Darlington pair transistors are those in which more than one transistor is connected in parallel to obtain a high current from the emitter to the collector.


2N4401 Manufacturer

Since 1974, Central Semiconductor has been producing revolutionary discrete semiconductors that are used in electronic goods all around the world. Standard and custom small-signal transistors, bipolar power transistors, MOSFETs, diodes, rectifiers, protection devices, current limiting diodes, bridge rectifiers, thyristors, and silicon carbide devices are currently available. The devices from Central are available in surface mount and through-hole packages, as well as bare die, TLMs (Tiny Leadless ModulesTM), and MDMs (Multi Discrete ModulesTM). Central has built a reputation as a producer of high-quality products that are routinely delivered on time, as well as a source of great value-added services.


2N2222 Manufacturer

STMicroelectronics is a global independent semiconductor firm that develops and delivers semiconductor solutions for a wide range of microelectronics applications. The Company's unparalleled mix of silicon and system knowledge, manufacturing strength, Intellectual Property (IP) portfolio, and strategic partners places it at the forefront of System-on-Chip (SoC) technology, and its products play a critical role in supporting today's convergence trends.


The Major Differences Of 2N4401 And 2N2222

The 2N4401 transistor is very similar to the 2N2222 NPN transistor, which is widely used. However, there are two key differences between the 2N4401 and the 2N2222. 2N4401 has a collector current limit of 500mA and a power dissipation of 652mW, making it suitable for medium loads when compared to 2N2222, but it can drive loads greater than BC547.

So, if you need an NPN transistor to switch loads or provide adequate amplification, the 2N4401 may be the ideal solution for your project.


Frequently Asked Questions

What can I use instead of 2N2222?

The 2N4013 is a few dollars/unit less expensive than the 2N2222 on Mouser, but it performs as poorly. The highest collector current is reduced to 100 mA as opposed to the 2N2222's 800 mA, but if you don't want that much current, it may be a reasonable compromise for saving a few dollars.

What is 2n4401?

The 2n4401 is an NPN bipolar junction transistor used for general purpose amplification and switching. Because conduction is carried out by both charge carriers, i.e. electrons and holes, it is referred to as a bipolar junction transistor. However, electrons will be the majority charge carriers.

What is the use of 2N2222 transistor?

The 2N2222 is a common NPN bipolar junction transistor (BJT) used for general-purpose low-power amplifying or switching applications. It is designed for low to medium current, low power, medium voltage, and can operate at moderately high speeds.