2N2222A NPN Transistor 3 Pin
₹2.70
The 2N2222A NPN transistor in a TO-92 is widely used for general-purpose low power amplification and switching tasks in electronic circuits.
100 in stock
Description
Technical Overview of the 2N2222A NPN Transistor 3 Pin
The 2N2222A NPN Transistor 3 Pin is arguably the most famous and widely used small-signal transistor in the world of electronics. It is a silicon-based bipolar junction transistor (BJT) designed for high-speed switching and moderate power amplification applications. Known for its ability to handle relatively high currents compared to other small-signal transistors, the 2N2222A is a “must-have” for any electronics lab. At BuyCircuitParts, we provide genuine 2N2222A NPN Transistor 3 Pin units in the standard TO-92 plastic package, ensuring your DIY projects and industrial repairs stay “on track.“
Key Specifications and Data Sheet Highlights
To ensure the 2N2222A NPN Transistor 3 Pin fits your circuit design, here are the critical technical parameters:
Type: NPN Bipolar Junction Transistor (BJT).
Package: TO-92 (Plastic encapsulated).
Collector-Emitter Voltage ($V_{ceo}$): 40V.
Collector-Base Voltage ($V_{cbo}$): 75V.
Continuous Collector Current ($I_c$): 600mA to 800mA (Peak).
DC Current Gain ($h_{FE}$): 100 to 300 (at 150mA).
Transition Frequency ($f_T$): 250 MHz to 300 MHz (Ideal for high-speed switching).
Pin Configuration: Emitter, Base, Collector (EBC).
Why 2N2222A is the “Standard” for Switching
The reason engineers frequently choose the 2N2222A NPN Transistor 3 Pin over the basic 2N2222 is the improved voltage ratings and faster response times. With a collector current of up to 800mA, it is strong enough to drive small DC motors, high-brightness LEDs, and electromagnetic relays directly from a microcontroller pin (like Arduino or ESP32). Its high transition frequency makes it suitable for RF (Radio Frequency) applications up to the VHF range. At BuyCircuitParts, we source transistors with consistent gain characteristics, so your amplification stages perform predictably.
Common Applications for the 2N2222A NPN Transistor
The versatility of the 2N2222A NPN Transistor 3 Pin makes it a staple in various electronic designs:
Relay Drivers: Using a low-power logic signal to switch a high-power relay coil.
Signal Amplifiers: Boosting low-level audio or sensor signals for further processing.
LED Dimming/Switching: Controlling PWM-based LED brightness for displays and indicators.
Pulse Width Modulation (PWM): Used in motor speed controllers and power converters.
Logic Gates: Building fundamental NOT, AND, and OR gates in discrete digital logic circuits.
Pro-Tips for Circuit Integration
To maximize the lifespan of your 2N2222A NPN Transistor 3 Pin, follow these best practices:
Base Resistor: Never connect the Base pin directly to a power source without a current-limiting resistor (usually 1kΩ to 10kΩ). Without it, the transistor will likely burn out.
Heat Management: While the 2N2222A can handle 600mA, it can get hot in the TO-92 package. If you are running it near its limit, ensure there is adequate airflow or consider a metal-can (TO-18) variant for better heat dissipation.
Flyback Diode: If you are using the 2N2222A to switch an inductive load like a motor or relay, always place a 1N4007 diode in parallel with the load to protect the transistor from voltage spikes.
Pin Identification: Always double-check the pinout (EBC). Looking at the flat side of the TO-92 package with leads pointing down, the pins are Emitter (1), Base (2), and Collector (3).
Why Buy from BuyCircuitParts?
As a dedicated seller, we know that the market is flooded with low-quality clones that fail at high voltages or high frequencies. At BuyCircuitParts, our 2N2222A NPN Transistor 3 Pin stock is sourced from reputable manufacturers. We ensure that the leads are sturdy and easy to solder, and the internal silicon die meets the 40V/600mA industry standard. We offer these in various pack sizes to suit both hobbyists and small-scale production runs. With our fast shipping and expert-level sourcing, we are here to provide the components that keep your electronics “on track.“
Durability and Reliability
The 2N2222A NPN Transistor 3 Pin in the TO-92 package is designed for longevity. The epoxy encapsulation provides excellent protection against humidity and mechanical shocks. Whether you are building a simple school project or a complex industrial sensor interface, this transistor offers the ruggedness and reliability you need. By choosing your components from BuyCircuitParts, you are ensuring that your circuit’s foundation is built on quality parts.
📐 Dimensions (Approx):
Package: TO-92
Height: 5.2 mm
Width: 4.5 mm
Lead Pitch: 2.54 mm
Lead Length: 14 mm (trimmable)
🧊 Note:
Product colour and markings may vary slightly based on manufacturer and batch. Functionality is guaranteed. (Refer to the product image for illustration only. For precise specifications, consult the datasheet.) For more details, check the 2N2222A NPN Datasheet.
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Additional information
| Weight | 0.1 g |
|---|---|
| Dimensions | 2.5 × 4.5 × 5.2 cm |
| HSN | 85412100 |
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