2N6427 Pinout, Equivalent, Application, Datasheet

The 2N6427 is a general-purpose NPN silicon transistor designed for low-power switching and signal amplification applications. It is commonly used in audio frequency stages, driver circuits, and low-voltage control systems. The 2N6427 pinout follows the Emitter–Base–Collector (E-B-C) configuration, enclosed in a TO-92 package, which makes it compact, reliable, and suitable for through-hole PCB mounting.

With a collector-emitter voltage (Vce) of 40 V, collector-base voltage (Vcb) of 40 V, and a maximum collector current of 500 mA, the 2N6427 transistor provides stable performance for small to medium current signal applications.

Introduction to 2N6427 NPN Transistor

The 2N6427 is a low-power NPN bipolar junction transistor (BJT), widely used in amplification and switching of analog or digital signals. Constructed in the TO-92 plastic package, it ensures high reliability and easy integration into low-current, low-voltage circuits.

Because of its good gain linearity, low noise, and stable thermal characteristics, the 2N6427 is popular in audio preamps, sensor interfaces, and general-purpose electronics.

2N6427 NPN Transistor

Pinout of 2N6427

Pin Configuration of 2N6427 Pinout

Key Features of 2N6427 Transistor

• General-purpose NPN silicon transistor
• Compact TO-92 package for easy PCB use
• Stable and predictable current gain
• Ideal for signal amplification and switching control
• Reliable performance with low saturation voltage

2N6427 Transistor Datasheet and Specifications

• Transistor Type: NPN Silicon
• Collector-Emitter Voltage (Vce): 40 V
• Collector-Base Voltage (Vcb): 40 V
• Emitter-Base Voltage (Veb): 5 V (typical)
• Collector Current (Ic): 500 mA
• Total Power Dissipation (Ptot): 625 mW
• DC Current Gain (hFE): 40 – 240 (typical)
• Transition Frequency (fT): 100 MHz (typical)
• Package Type: TO-92
• Pin Configuration: Emitter – Base – Collector (E-B-C)

Equivalent and Alternative Transistors

You can replace 2N6427 with similar NPN transistors that share close electrical parameters:

• 2N2222 – General-purpose NPN transistor
• BC337 – Medium-power NPN amplifier transistor
• 2N3904 – Popular small-signal NPN transistor
• PN2222A – NPN transistor with similar performance
• 2N4401 – NPN transistor for general-purpose use

Always verify the pin sequence and gain range when choosing a substitute.

More Circuit Layouts

Applications of 2N6427 Transistor

The 2N6427 is suitable for numerous low-power and medium-current electronic circuits, including:

• Audio frequency amplifier stages
• Small signal preamplifiers
• Low-side switching circuits
• Driver and control systems
• Analog signal processing circuits
• Educational and DIY electronics projects

Advantages of 2N6427 Transistor

• Easy to pair with complementary transistor (2N6426)
• Stable gain across wide temperature ranges
• Compact and reliable TO-92 casing
• Cost-effective and widely available
• Good frequency response for general use

Conclusion

The 2N6427 NPN transistor is a versatile low-power device suitable for audio amplifiers, switching modules, and signal driver circuits. With 40 V operation, 500 mA current capability, and 625 mW dissipation, it delivers consistent results in both analog and digital applications.

Datasheet & Pinout of 2N6427 NPN Transistor

Click the following Button to download the datasheet of 2N6427 Transistor :

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