Introduction
The 2N2222 is a widely used and highly versatile general-purpose NPN transistor known for its reliable performance in low-power amplification and high-speed switching applications. It’s a staple in both hobbyist and professional circuits due to its excellent balance of specifications. The transistor is capable of handling a continuous collector current (IC) of up to 800mA, which is sufficient for driving a variety of loads, from small motors and relays to multiple LEDs. It has a collector-emitter voltage (VCEO) of 30V, making it suitable for a wide range of low-to-medium voltage circuits.
A key feature of the 2N2222 is its high DC current gain (hFE), typically ranging from 100 to 300. This high gain allows a very small base current to control a much larger collector current, making it highly efficient for both amplification and switching. Its high transition frequency (fT) of 300 MHz enables it to be used in high-frequency applications, including radio frequency (RF) circuits. The 2N2222 also boasts a low saturation voltage, which minimizes power loss when the transistor is fully “on,” improving overall circuit efficiency.
2N2222 NPN Transistor
The transistor is available in several package types, with the most common being the metal TO-18 and the plastic TO-92 (often designated as PN2222A). The metal TO-18 package offers superior thermal performance, allowing it to handle more power. The 2N2222 is a go-to component for a broad range of applications, including signal amplification, voltage regulation, and as a general-purpose switch in everything from educational projects to commercial products.
2N2222 Pinout
2N2222 NPN Transistor Key Features
- Medium Current Capability
- Medium Voltage Rating
- High Transition Frequency
- High DC Current Gain
- Low Saturation Voltage
- Robust Package Options
2N2222 Transistor Specifications/Characteristics
| Characterstics | Rating (Max) |
|---|---|
| Collector Current(IC): | 600mA |
| Collector-Emitter Voltage (VCE): | 40V |
| Collector-Base Voltage (VCB): | 75V |
| Emitter-Base Voltage (VEBO): | 6V |
| Collector Dissipation (Pc): | 625 mW |
| Transition Frequency (fT): | 300 MHz |
| DC Current Gain (hFE): | 35 – 300 |
| Storage & Operating temperature Should Be: | -55 to +150 °C |
More Circuit Layouts
Key Applications of 2N2222 NPN Transistor
- Audio Preamplifiers
- Audio Amplifier Stages
- Switching many loads at the same time
- Darlington Pairs
- RF Circuits
- Sensor Circuits
PNP Complimentary Transistor
PNP Complementary of 2N2222 transistor is 2N2907.
Equivalent transistors of 2N2222
2N2219, 2N1613, 2N2218, 2N2792, NTE123A, 2N3904
(Pin configuration of SOME transistors are different from 2N2222).
Datasheet of 2N2222 NPN Transistor
Click the following Button below to download the datasheet of 2N2222:
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