2N5401 Pinout, Equivalent, Application, Datasheet

The 2N5401 pinout follows the Emitter–Base–Collector (E–B–C) configuration in a TO-92 plastic package. This 2N5401 PNP transistor is a high-voltage, low-current device capable of handling up to -150V collector-emitter and -160V collector-base voltage, making it perfect for audio amplifiers, voltage control, and signal switching applications. Due to its excellent reliability and low noise performance, it is widely used in high-voltage signal stages and low-power linear circuits.

Introduction to 2N5401 PNP Transistor

The 2N5401 transistor is a silicon PNP bipolar junction transistor (BJT) designed for general-purpose amplifier and switching applications. With a maximum collector current of 600 mA and power dissipation of 625 mW, it delivers dependable performance in audio preamplifiers, voltage regulators, and signal processing modules.

The 2N5401 PNP transistor is highly reliable for high-voltage analog circuits and industrial electronic control systems, where stability and wide dynamic range are required. Its TO-92 package allows for easy integration on PCB boards or breadboards, making it an ideal choice for engineers and hobbyists.

2N5401 PNP Transistor

Pinout of 2N5401

Understanding the 2N5401 Pinout Configuration

When viewing the 2N5401 transistor pinout from the flat side with leads pointing downward, the pins are arranged as Emitter–Base–Collector (E–B–C).

Pin Configuration of 2N5401 Pinout

Key Features of 2N5401 Transistor

• High-voltage PNP transistor for amplifier and switching circuits
• Low noise and distortion suitable for audio signal applications
• Reliable DC current gain and performance stability
• Compact TO-92 plastic package for universal use
• Efficient at moderate power levels and voltage swings
• Long service life and thermal endurance

2N5401 Transistor Datasheet and Specifications

• Transistor Type: PNP Silicon
• Collector–Emitter Voltage (Vce): -150 V
• Collector–Base Voltage (Vcb): -160 V
• Emitter–Base Voltage (Veb): -5 V
• Collector Current (Ic): -600 mA
• Total Power Dissipation (Ptot): 625 mW
• DC Current Gain (hFE): 40 – 240 (typical range)
• Transition Frequency (fT): 100 MHz (typical)
• Junction Temperature (Tj): 150°C (max)
• Package Type: TO-92
• Pin Sequence: Emitter – Base – Collector (E–B–C)

Working Principle of 2N5401 PNP Transistor

The 2N5401 PNP transistor operates as a current-controlled amplifier or switch. When the base is at a lower potential than the emitter, it becomes forward-biased and allows current to flow from emitter to collector.

Due to its high voltage tolerance (up to -150V Vce), this transistor is often used in audio preamplifiers, signal amplifiers, and high-voltage driver circuits. It offers low leakage, high breakdown voltage, and thermal stability, making it suitable for high-performance analog electronics.

More Circuit Layouts

Typical Applications of 2N5401

• Audio amplifier and driver stages
• Signal processing and control circuits
• Voltage regulator feedback stages
• Low-frequency oscillators and filters
• Analog switching and voltage detection systems
• High-voltage signal amplification

Equivalent Transistors and Alternatives

If 2N5401 transistor is unavailable, the following equivalents can be used with similar characteristics and pin sequence (E–B–C):

• MPSA93 – Higher-voltage PNP transistor for extended breakdown use
• 2N5400 – Same series, slightly lower voltage version (-120V Vce)
• BC556C – General-purpose PNP transistor for moderate voltage use

Always ensure correct pin mapping before substitution.

Frequently Asked Questions (FAQ)

What is the 2N5401 transistor used for?

It’s used in high-voltage signal and amplifier circuits such as audio preamps and control modules.

What is the 2N5401 pinout?

The 2N5401 pinout is Emitter–Base–Collector (E–B–C) when viewed from the flat side.

What is the maximum voltage of 2N5401?

It can handle up to -150V collector-emitter and -160V collector-base voltage.

Is 2N5401 a high-voltage transistor?

Yes, it’s specifically designed for high-voltage low-current applications.

Can 2N5401 replace 2N5400?

Yes, the 2N5401 is the higher-voltage equivalent of the 2N5400 transistor.

Conclusion

The 2N5401 PNP transistor is a high-voltage, low-current, silicon BJT widely used in audio amplification, switching, and voltage regulation circuits. With its -150V collector-emitter voltage, 600 mA current rating, and TO-92 package, it’s a dependable choice for signal-level amplification and precision analog designs.

Its combination of low noise, high reliability, and thermal stability makes it a perfect match for both commercial and hobbyist applications in the electronics field.

Datasheet & Pinout of 2N5401 PNP Transistor

Click the following Button to download the datasheet of 2N5401 Transistor :

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