What is the price of the 2N2222 NPN Transistor in Bangladesh?

The current price of the 2N2222 NPN Transistor at KathalTech is ৳5.

What is a 2N2222 transistor?

The 2N2222 is a general-purpose NPN bipolar junction transistor commonly used for electronic switching and low-power amplification.

Is the 2N2222 an NPN or PNP transistor?

The 2N2222 is an NPN bipolar junction transistor.

What are the terminals of a 2N2222 transistor?

The 2N2222 has three terminals: Collector, Base and Emitter. The exact physical pin arrangement can vary depending on the manufacturer and package.

What is the 2N2222 transistor used for?

The 2N2222 is commonly used for switching, low-power amplification, LED control, relay driving, buzzer circuits, signal processing and other general electronics applications.

Can the 2N2222 be used with Arduino?

Yes. The 2N2222 can be used as a switching or driver transistor in Arduino projects when its electrical ratings and base-drive requirements are suitable for the application.

Can the 2N2222 be used with ESP32?

Yes. The 2N2222 can be controlled by an ESP32 GPIO through an appropriate base resistor and circuit configuration.

Can a 2N2222 drive a relay?

Yes. A 2N2222 can be used to drive a suitable low-power relay coil when the transistor's voltage, current and power ratings are sufficient. A flyback diode should generally be placed across the relay coil.

Can a 2N2222 control a small motor?

It may be suitable for certain low-current motors when the transistor's electrical ratings are sufficient. A suitable flyback protection diode and appropriate driver circuit should be used.

Does the 2N2222 require a base resistor?

A base resistor is normally used when driving a 2N2222 from a digital output to limit base current and provide appropriate transistor biasing.

Does the 2N2222 have the same pinout in every package?

No. Pin assignments can vary between manufacturers and package versions. Always verify the datasheet or marking for the specific 2N2222 transistor before connecting it.

2N2222 NPN Transistor

Name: 2N2222 NPN Transistor
Brand: KathalTech
SKU: 2n2222-npn-transistor
Price: 5.00 BDT
Availability: InStock
Rating: 5.0 (1 reviews)

0.0 (0 Reviews)

৳5.00

VAT inclusive; Computed calculations added locally.

The 2N2222 NPN Transistor is a widely used general-purpose bipolar junction transistor (BJT) suitable for switching and low-power amplification applications. It is commonly used in Arduino, ESP32, robotics, LED drivers, relay drivers, and general electronics circuits

In Stock & Ready to Ship 14 watching

Delivery Rates Express

Inside Dhaka: ৳70 (2-4 Business Days)

Outside Dhaka: ৳122 (3-5 Days)

COD available 100% Genuine

Jump to: Overview Description Specifications Reviews (0) FAQs (11)

Overview

2N2222 NPN Transistor

The 2N2222 NPN Transistor is a versatile general-purpose transistor widely used for electronic switching and amplification. Its compact size and straightforward operation make it a popular choice for students, hobbyists, makers, and engineers working on electronic circuits.

As an NPN bipolar junction transistor, the 2N2222 can be used to control loads from a low-power control signal. For example, it can serve as a switching stage for LEDs, small relays, buzzers, and other suitable loads in microcontroller-based projects.

The transistor is particularly useful in Arduino and ESP32 projects, where it can act as an interface between a microcontroller GPIO and a suitable external load. It can also be used in basic amplifier stages, signal circuits, oscillators, and educational electronics experiments.

Whether you're building a simple switching circuit or experimenting with transistor-based electronics, the 2N2222 NPN Transistor is a practical component to keep in your electronics component collection.

Note: Same Batch/Lot or Part Numbers are not guaranteed. Return at Change of mind for this reason is not accepted.

Customer Reviews

Share your verified purchase experience with the community.

Earn Loyalty Rewards

Get 50 Points for reviewing + bonus points when upvoted!

Want to share your experience?

New here? Create a free account

Verified Comments Listing

2N2222 NPN Transistor

The 2N2222 is a general-purpose NPN bipolar junction transistor (BJT) commonly used for low-power switching and amplification. It is one of the most widely used transistor types in educational, hobby, and general electronics applications.

NPN Transistor Operation

The transistor has three terminals:

Collector (C)
Base (B)
Emitter (E)

A relatively small current applied to the base can control a larger current flowing between the collector and emitter. This makes the 2N2222 useful as an electronic switch or amplifier.

Switching Applications

When used as a switch, the 2N2222 can allow a microcontroller or other control circuit to operate a suitable load that requires more current than the controller's GPIO can safely provide.

Common examples include:

LEDs
Buzzers
Small relays
Small motors
Signal circuits
Other low-power loads

For inductive loads such as motors and relay coils, an appropriate flyback diode should generally be used to protect the switching transistor from voltage spikes.

Arduino and ESP32 Projects

The 2N2222 can be used as a simple driver transistor in Arduino and ESP32 projects. A base resistor is normally required to limit base current and provide appropriate transistor drive.

Amplification

In addition to switching, the 2N2222 can be configured as a small-signal amplifier for suitable audio, sensor, and electronic signal applications.

Applications

Transistor switching circuits
LED drivers
Relay driver circuits
Small motor control
Buzzer control
Signal amplification
Sensor circuits
Oscillator circuits
Arduino projects
ESP32 projects
Robotics
Educational electronics

Note: Electrical specifications such as maximum collector current, collector-emitter voltage, power dissipation, gain, and pin configuration can vary between manufacturers and package variants. Always check the datasheet for the exact 2N2222 variant before designing a circuit.

Product Name	2N2222 NPN Transistor
Component Type	NPN Bipolar Junction Transistor (BJT)
Transistor Family	General-Purpose NPN
Terminals	Collector, Base, Emitter
Applications	Switching, Amplification, Signal Processing, Driver Circuits
Microcontroller Use	Arduino, ESP32 and Other Compatible Controllers
Mounting Type	Through-Hole
Package	Varies by Manufacturer