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Product Description (Detailed):

Unlock versatile switching and amplification capabilities in your electronic circuits with the legendary 2N2222A NPN Bipolar Junction Transistor (BJT). Housed in the classic, robust TO-18 metal can package, this transistor is a staple for engineers, hobbyists, and students due to its reliability, wide availability, and excellent performance characteristics. The 2N2222A is a general-purpose, small-signal transistor renowned for its ability to function effectively as both a switch and an amplifier.

As a switching transistor, the 2N2222A can efficiently control higher current or voltage loads (up to 60V collector-emitter voltage, 800mA continuous collector current) using a small input signal from a microcontroller like an Arduino or Raspberry Pi. This makes it ideal for driving relays, controlling small DC motors, switching LEDs, and various other digital control applications where an output device requires more current than a microcontroller pin can provide. In its amplifier role, this NPN BJT offers a high current gain (hFE, typically 100-300), allowing it to amplify weak signals effectively, making it suitable for audio pre-amplifiers, sensor signal conditioning, and other analog circuit designs. The sturdy TO-18 metal can package provides superior thermal dissipation compared to plastic packages, enhancing its durability and reliability, especially in applications where stable performance over time or in slightly higher temperature environments is crucial. Its straightforward three-pin configuration (Emitter, Base, Collector) ensures easy integration into breadboards and printed circuit boards. Whether you're building logic circuits, power control modules, or analog signal conditioning systems, the 2N2222A NPN Bipolar Junction Transistor in the TO-18 package remains a top choice for dependable and versatile performance.

The 2N2222A is a widely used NPN BJT transistor designed for general-purpose switching and low-to-medium power amplification. Known for its high current gain, fast response, and robust TO-18 metal can package, it is preferred in industrial, academic, and DIY electronics applications.

Capable of handling up to 800mA of collector current, the 2N2222A is perfect for controlling relays, motors, LEDs, or acting as an analog amplifier in audio or signal circuits. It's a go-to choice in Arduino projects where reliable switching and compact design are required.

Key Features:

• High-performance NPN bipolar junction transistor (BJT)

• Ideal for switching, signal amplification, and motor/relay control

• Collector current up to 800mA

• Fast switching speed suitable for PWM and logic circuits

• Compatible with Arduino, Raspberry Pi, microcontrollers

• Durable TO-18 metal can package

• Low saturation voltage and high reliability

Technical Specifications:

How to Use:

Pin Configuration (TO-18, flat side facing you):

• Pin 1: Emitter

• Pin 2: Base

• Pin 3: Collector (connected to case)

Typical Use Cases:

• Use with Arduino digital output to control relays, LEDs, or motors

• Use as common-emitter amplifier for signal processing

• Create inverter or NOT logic gates with simple resistors

For switching: Connect base through resistor (1kΩ) to Arduino pin, emitter to GND, and collector to load (relay/LED) → to Vcc.

Applications:

• Relay and motor driver circuits

• General-purpose switching (Arduino/AVR/STM32)

• Signal amplification (audio, RF, analog)

• Oscillators, timers, and logic building blocks

• DIY electronics and robotics projects

• Educational kits and prototyping boards

Package Includes:

• 1 × 2N2222A Transistor (TO-18 Metal Can)