MJ15004 Pinout Equivalent Applications, Datasheet

The MJ15004 pinout refers to the pin configuration and internal structure of this high-power PNP bipolar junction transistor (BJT), widely used in industrial amplifiers, audio stages, and power switching circuits. Designed for superior current and voltage handling, the MJ15004 delivers consistent performance in high-demand environments such as power amplifiers, regulators, and inverter systems. Its robust TO-3 metal package ensures excellent heat dissipation, making it a reliable choice for both professional and DIY electronics projects.

Introduction to MJ15004 PNP Transistor

The MJ15004 transistor is a high-power PNP BJT developed for linear and switching applications requiring high current and voltage ratings. It operates with a collector-emitter voltage of −140V, a collector current of −20A, and can safely dissipate up to 250 watts of power when properly heat-sunk.

This transistor is commonly used in audio amplifier output stages, servo amplifiers, and motor control circuits, where stable thermal and electrical characteristics are critical. The MJ15004 is known for its complementary pairing with the MJ15003 NPN transistor, forming a balanced high-power push-pull configuration.

MJ15004 PNP Transistor

Pinout of MJ15004

Understanding the MJ15004 Pinout Configuration

The MJ15004 pinout follows the Base-Emitter-Collector sequence when viewed from the bottom (lead side) of the TO-3 package. This configuration simplifies PCB and heatsink mounting, offering excellent mechanical stability and low thermal resistance.

Pin Configuration of MJ15004 Pinout

Key Features of MJ15004 Transistor

• High current and power handling capability
• Excellent linear gain performance
• Low saturation voltage for efficient operation
• Wide safe-operating-area for durability
• TO-3 metal case for superior heat dissipation
• Designed for audio and industrial amplifier stages

MJ15004 Transistor Datasheet and Specifications

• Collector-Emitter Voltage (Vce): −140V
• Collector-Base Voltage (Vcb): −140V
• Emitter-Base Voltage (Veb): −5V
• Collector Current (Ic): −20A
• Power Dissipation (Pc): 250W
• DC Current Gain (hFE): 25 to 150
• Transition Frequency (fT): 2 MHz (typical)
• Operating Junction Temperature: up to 200°C
• Package Type: TO-3 Metal Case
• Pin Sequence: Base-Emitter-Collector

Working Principle of MJ15004 Transistor

The MJ15004 PNP transistor conducts when a small current flows out of its base, allowing a much larger current to pass from the emitter to collector. In amplifier circuits, this provides the negative half of an audio waveform, while its complementary NPN counterpart (MJ15003) manages the positive half.

This push-pull operation minimizes distortion and improves efficiency, making the MJ15004 ideal for high-fidelity audio power amplifiers and DC motor control systems. It can handle both linear and saturated switching conditions efficiently.

More Circuit Layouts

Typical Applications of MJ15004

• High-power audio amplifier output stages
• DC motor drivers and control units
• Power regulators and supplies
• Inverter and converter systems
• Industrial servo amplifier circuits
• General-purpose high-power switching

NPN Complementary Transistor

The NPN complementary transistor for MJ15004 is MJ15003.
Both devices share identical voltage, current, and power ratings but opposite polarities. Together, they form a complementary push-pull pair widely used in Class AB and Class B amplifier outputs.

This pairing ensures symmetric waveform amplification, reducing crossover distortion and enhancing power efficiency.

Equivalent Transistors and Alternatives

• 2N5631
• 2N5630
• MJ21193 (PNP upgrade)
• MJ2955 (lower-power equivalent)
• TIP36C (plastic-package alternative)

These equivalents vary slightly in frequency response, gain, or packaging but can substitute the MJ15004 depending on circuit design and dissipation needs.

Comparison Summary: MJ15004 vs MJ15003

The MJ15004 (PNP) and MJ15003 (NPN) are designed as exact complementary transistors. Both feature the same 140V, 20A, and 250W ratings, built in the durable TO-3 metal package.

In practical applications, MJ15003 handles the positive cycle of a waveform, while MJ15004 processes the negative cycle, delivering balanced amplification in push-pull amplifier stages. Their matching electrical and thermal characteristics make them ideal for high-fidelity, high-power audio amplifiers and industrial power circuits.

Frequently Asked Questions (FAQ)

What is the MJ15004 transistor used for?

The MJ15004 is mainly used in high-power audio amplifiers, servo systems, and industrial power supplies due to its excellent current handling and thermal stability.

What type of transistor is MJ15004?

It is a PNP power transistor capable of handling up to 20A collector current and 250W power dissipation.

What is the MJ15004 pin configuration?

The MJ15004 pinout follows the Base-Emitter-Collector layout when viewed from the bottom of the TO-3 package.

What is the complementary transistor for MJ15004?

The MJ15003 is the NPN complementary transistor for MJ15004, sharing identical power and voltage ratings.

Can I use MJ2955 instead of MJ15004?

Yes, but the MJ2955 has a lower voltage and power rating, making it suitable only for moderate-power circuits compared to MJ15004.

Conclusion

The MJ15004 PNP transistor remains one of the most reliable high-power components for professional audio, control, and power conversion systems. Its robust structure, high-current capability, and perfect complementarity with MJ15003 make it a staple in power amplifier designs.

With proper heatsinking and circuit configuration, MJ15004 ensures long-term stability, excellent linearity, and top-tier performance in any demanding application.

Datasheet & Pinout of MJ15004 NPN Transistor

Click the following Button to download the datasheet of MJ15004 Transistor :

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