2N2218 Pinout, Equivalent, Application, Datasheet

The 2N2218 pinout defines this NPN silicon transistor as a reliable device used for signal amplification, switching, and low-power driver circuits. Built in a TO-39 metal package, the 2N2218 offers strong thermal performance, high current handling capability, and excellent frequency response, making it a versatile choice in both RF and audio frequency (AF) applications.

Introduction to 2N2218 NPN Transistor

The 2N2218 transistor is a medium-power NPN BJT (Bipolar Junction Transistor) designed for applications that require fast switching and stable amplification. With a collector-emitter voltage of 30 V, collector-base voltage of 60 V, and collector current up to 800 mA, it provides consistent performance for a wide variety of amplifier and switching circuits.

Encased in the TO-39 metal can, this transistor ensures efficient heat dissipation and durability. Engineers and hobbyists often use it in audio amplifiers, oscillator stages, and digital switching devices where compact size and robust characteristics are essential.

2N2218 NPN Transistor

Pinout of 2N2218

Pin Configuration of 2N2218 Pinout

Key Features of 2N2218 Transistor

• Medium-power NPN silicon transistor
• Designed for switching and amplifier stages
• Excellent frequency response for RF applications
• Robust TO-39 metal case for superior heat dissipation
• Reliable gain stability and low noise operation
• Compatible with a wide range of industrial and hobbyist projects

2N2218 Transistor Datasheet and Specifications

• Collector-Emitter Voltage (Vce): 30 V
• Collector-Base Voltage (Vcb): 60 V
• Emitter-Base Voltage (Veb): 5 V
• Collector Current (Ic): 800 mA
• Total Power Dissipation (Ptot): 800 mW
• DC Current Gain (hFE): 30 – 300
• Transition Frequency (fT): 250 MHz (typical)
• Junction Temperature (Tj max): 200 °C
• Package Type: TO-39 Metal Can
• Polarity: NPN
• Pinout Configuration: Emitter–Base–Collector (E–B–C)

Equivalent and Alternative Transistors

The 2N2218 equivalents with comparable electrical characteristics include:

• 2N2222
• PN2222A
• BC337
• 2N1613
• 2N2904
• 2N2102

Always verify pin configuration and package type before substituting any transistor.

More Circuit Layouts

Applications of 2N2218 Transistor

• RF and low-frequency amplifiers
• Pulse and signal switching circuits
• Oscillator and waveform generation stages
• Driver circuits for small relays or LEDs
• Low-power signal processing
• General electronic experimentation and learning

Understanding the 2N2218 Pinout Configuration

The 2N2218 pinout follows the Emitter–Base–Collector (E–B–C) configuration when viewed from the bottom (leads downward). This straightforward layout allows for easy installation in PCB or breadboard circuits.

Working Principle of 2N2218 Transistor

The 2N2218 operates as a current amplifier where a small base current controls a larger collector current. When the transistor is forward biased, it conducts between collector and emitter, functioning effectively as an electronic switch or amplifier.

Because of its high transition frequency (up to 250 MHz) and strong gain stability, it performs well in RF circuits, low-power amplifiers, and pulse switching circuits.

Frequently Asked Questions (FAQ)

What is the 2N2218 transistor used for?

The 2N2218 is used in amplifier, oscillator, and switching circuits due to its high frequency and moderate power handling.

What is the pinout of the 2N2218?

The 2N2218 pinout is Emitter–Base–Collector (E–B–C) when viewed from the bottom of the TO-39 package.

Is 2N2218 a power transistor?

It is classified as a medium-power NPN transistor, suitable for moderate current loads and amplification.

What is the difference between 2N2218 and 2N2222?

The 2N2218 and 2N2222 are electrically similar, but the 2N2218 typically comes in a metal TO-39 package for better thermal handling.

Conclusion

The 2N2218 NPN transistor is a highly reliable, general-purpose semiconductor ideal for RF, audio, and switching applications. With its 30 V collector-emitter voltage, 60 V collector-base voltage, and 800 mA collector current, it delivers dependable performance in both industrial and educational circuits. Its TO-39 metal can design ensures long-term thermal stability, making it an enduring favorite in electronic designs.

Datasheet & Pinout of 2N2218 NPN Transistor

Click the following Button to download the datasheet of 2N2218 Transistor :

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