2N2907 Pinout, Equivalent, Application, Datasheet

The 2N2907 pinout explains the terminal configuration of this PNP silicon transistor, a popular device used for amplification, signal control, and switching in low-power electronic applications. Known for its stability and consistency, the 2N2907 transistor is a reliable choice in audio circuits, relay drivers, and general analog stages, where precision and low noise performance are required.

Introduction to 2N2907 PNP Transistor

The 2N2907 is a general-purpose PNP bipolar junction transistor (BJT) designed for low and medium current signal processing. It comes in a TO-39 metal can package, offering mechanical strength and efficient thermal dissipation. Engineers and hobbyists often use it in amplifier circuits, control interfaces, and small-signal switching designs due to its consistent gain and robust characteristics.

Its silicon-based PNP construction ensures reliable performance under variable operating conditions, making it ideal for industrial automation, communication systems, and analog amplification setups.

2N2907 PNP Transistor

Pinout of 2N2907

Pin Configuration of 2N2907 Pinout

Key Features of 2N2907 Transistor

• PNP silicon transistor for switching and amplification
• Moderate voltage and current ratings for versatile applications
• Reliable DC gain with low leakage current
• TO-39 metal case for efficient heat dissipation
• High-frequency response with linear output characteristics
• Widely available and cost-effective for general use

2N2907 Transistor Datasheet and Specifications

• Collector-Emitter Voltage (Vce): –40 V
• Collector-Base Voltage (Vcb): –60 V
• Collector Current (Ic): –600 mA
• Total Power Dissipation (Ptot): 400 mW
• DC Current Gain (hFE): 100 (typical)
• Transition Frequency (fT): 200 MHz (typical)
• Junction Temperature (Tj max): 200 °C
• Package Type: TO-39 Metal Can
• Polarity: PNP
• Pin Configuration: Emitter–Base–Collector (E–B–C)

Equivalent and Alternative Transistors

The following transistors can substitute the 2N2907 in most designs:

• 2N2907A
• 2N2906
• 2N2905
• BC558 (for small signal use)
• PN2907
• MPS2907

Always check pin configuration and gain requirements before replacement.

More Circuit Layouts

Applications of 2N2907 Transistor

• Audio amplifier circuits
• Relay and solenoid driver stages
• Analog and signal processing
• Low-frequency preamplifiers
• Switching and inverter circuits
• Sensor and control modules

Understanding the 2N2907 Pinout Configuration

The 2N2907 pinout follows the Emitter–Base–Collector (E–B–C) order when viewed from the bottom with the leads facing downward. This arrangement is standard for most TO-39 PNP transistors and ensures compatibility with a wide range of circuit layouts.

Working Principle of 2N2907 Transistor

The 2N2907 operates by allowing a controlled flow of current from the emitter to collector when a small base current is applied. Since it is a PNP transistor, the base must be more negative than the emitter for conduction to occur. This makes it highly suitable for low-side switching and analog amplification where consistent gain and minimal noise are critical.

Comparison Summary — 2N2907 vs 2N2906

The 2N2907 and 2N2906 are both PNP silicon transistors sharing identical voltage and current limits (–40 V / –60 V and 600 mA). The major difference lies in manufacturing tolerance and packaging — both use TO-39 metal cans, but the 2N2907 typically has slightly different frequency response characteristics, offering a smoother performance in switching and low-frequency amplification tasks.

Both are excellent general-purpose transistors and can often be used interchangeably depending on circuit requirements.

Frequently Asked Questions (FAQ)

What is the 2N2907 transistor used for?

It is used in audio amplifiers, signal control, and driver circuits that require moderate current handling.

What is the 2N2907 pinout?

The 2N2907 follows the Emitter–Base–Collector (E–B–C) configuration in TO-39 metal cans.

What type of transistor is 2N2907?

It is a PNP silicon transistor designed for general-purpose low-power applications.

Can I replace 2N2907 with 2N2907A?

Yes, both versions are compatible, with the “A” variant typically supporting slightly improved gain and voltage ratings.

What package does the 2N2907 use?

It comes in a TO-39 metal can package for durability and heat management.

Conclusion

The 2N2907 PNP transistor is a time-tested, versatile, and durable component that offers reliable performance in signal amplification, switching, and control circuits. Its TO-39 package, solid electrical characteristics, and low noise operation make it suitable for audio, industrial, and general-purpose electronic applications where dependability is key.

Datasheet & Pinout of 2N2907 PNP Transistor

Click the following Button to download the datasheet of 2N2907 Transistor :

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