2N4033 Pinout, Equivalent, Application, Datasheet

The 2N4033 is a PNP silicon transistor designed for medium-power switching and audio amplification applications. It is housed in a TO-39 metal can package, which ensures durability and efficient heat dissipation. The 2N4033 pinout follows the Emitter–Base–Collector (E-B-C) sequence, allowing straightforward integration into analog and control circuits.

With a collector-emitter voltage (Vce) of –80 V and a collector-base voltage (Vcb) of –80 V, this transistor handles up to –1 A of current and dissipates 0.8 W of power. These specifications make it suitable for audio amplifiers, signal drivers, and switching regulators requiring dependable performance and low distortion.

Introduction to 2N4033 PNP Transistor

The 2N4033 is a general-purpose PNP transistor that provides high reliability in audio frequency, switching, and signal processing circuits. Built using planar silicon technology, it delivers low noise, stable current gain, and excellent linearity.

Its TO-39 metal casing allows for efficient heat transfer, extending component life and maintaining stable thermal performance. Because of its moderate voltage and current range, the 2N4033 is ideal for low-distortion amplifiers, oscillators, and analog signal control applications in both consumer and industrial electronics.

2N4033 PNP Transistor

Pinout of 2N4033

Pin Configuration of 2N4033 Pinout

Key Features of 2N4033 Transistor

• PNP silicon transistor for audio and switching applications
• High voltage tolerance up to –80 V
• Low noise and stable performance
• Reliable operation in medium-power circuits
• Metal TO-39 package for enhanced durability
• Consistent current gain and thermal stability

2N4033 Transistor Datasheet and Specifications

• Transistor Type: PNP Silicon
• Collector-Emitter Voltage (Vce): –80 V
• Collector-Base Voltage (Vcb): –80 V
• Emitter-Base Voltage (Veb): –5 V (typical)
• Collector Current (Ic): –1 A
• Power Dissipation (Ptot): 0.8 W
• DC Current Gain (hFE): 40 – 120 (typical)
• Transition Frequency (fT): 30 – 40 MHz
• Operating Temperature Range: –65 °C to +200 °C
• Package Type: TO-39 Metal Can
• Pin Configuration: Emitter – Base – Collector (E-B-C)

Equivalent and Alternative Transistors

Here are suitable alternatives and equivalents for the 2N4033 transistor that provide similar performance characteristics:

• 2N4030 – PNP, –40 V, TO-39 package
• 2N4032 – PNP, –60 V, TO-39 package
• 2N4036 – PNP, –65 V, TO-39 package
• 2N4037 – PNP, –40 V, TO-39 package
• BD140 – PNP, –80 V, TO-126 plastic package
• 2N2907A – PNP, –60 V, TO-18 package

Check the pin orientation before substituting any equivalent.

More Circuit Layouts

Applications of 2N4033 Transistor

The 2N4033 transistor is widely used in both analog and digital circuits, particularly where medium voltage and power handling are needed:

• Audio frequency amplifiers
• Low-frequency oscillators
• Analog signal preamplifiers
• Switching control modules
• Voltage regulator and driver stages
• Small signal amplification in test instruments

Working Principle of 2N4033 Transistor

As a PNP bipolar junction transistor, the 2N4033 becomes active when the base is at a lower potential than the emitter. A small base current controls a larger emitter-to-collector current flow. In amplifier circuits, it boosts weak input signals, and in switching applications, it allows precise current control between ON and OFF states.

Advantages of 2N4033 Transistor

• Efficient in both linear and switching regions
• High breakdown voltage ensures safe operation
• Excellent signal stability and low thermal drift
• Compact metal design with robust performance
• Compatible with many amplifier and regulator designs

Conclusion

The 2N4033 PNP transistor is a medium-power semiconductor known for its –80 V rating, –1 A current capacity, and low noise amplification capabilities. Its TO-39 E-B-C design makes it ideal for use in audio, signal, and industrial control circuits where durability and precision matter.

With stable operation and strong voltage tolerance, the 2N4033 remains a dependable choice for engineers, hobbyists, and circuit designers who require consistent and efficient transistor performance.

Datasheet & Pinout of 2N4033 PNP Transistor

Click the following Button to download the datasheet of 2N4033 Transistor :

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