2N2222A NPN General-Purpose Switching Transistor – TO-92 Package
Product Description
The 2N2222A is a popular NPN bipolar junction transistor designed for general-purpose switching and low-power signal amplification. It is suitable for controlling LEDs, buzzers, relays and other small electronic loads using signals from microcontrollers or basic control circuits.
Its compact through-hole package makes it convenient for breadboard experiments, PCB assembly, repairs, prototypes, Arduino projects and educational electronics.
Key Features
- General-purpose NPN transistor
- Suitable for switching and signal amplification
- Handles higher current than many small-signal transistors
- Fast switching response
- Compact through-hole package
- Easy to use with breadboards and PCBs
- Suitable for Arduino and other microcontroller projects
Technical Specifications
| Parameter | Specification |
|---|---|
| Transistor type | NPN BJT |
| Part number | 2N2222A |
| Package type | TO-92 or equivalent |
| Maximum collector-emitter voltage | Typically 40V |
| Maximum collector current | Up to 600mA |
| Maximum power dissipation | Depends on package and manufacturer |
| DC current gain | Varies by manufacturer and operating conditions |
| Mounting type | Through-hole |
Common Applications
- LED and buzzer control
- Small relay-driver circuits
- Signal-amplifier circuits
- Motor-control stages for light loads
- Switching and pulse circuits
- Oscillators and timers
- Sensor-interface circuits
- Arduino, ESP and microcontroller projects
Package Contents
- 1 × 2N2222A NPN Transistor
Important Note
The pin configuration and maximum ratings may vary depending on the manufacturer and package supplied. Always verify the component datasheet before connecting it. Use a suitable base resistor, and add a flyback diode when operating relays, motors or other inductive loads.
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