2N6491 Pinout, Equivalent, Application, Datasheet

Understanding the 2N6491 pinout is essential for safe operation and reliable performance when using this high-power PNP transistor in switching stages, power supplies, motor drivers, and audio amplifier circuits. With strong current capability, solid voltage tolerance, and dependable thermal behavior, the 2N6491 is widely used in industrial and high-current electronic applications.

Introduction to 2N6491 PNP Transistor

The 2N6491 is a high-power PNP bipolar junction transistor designed for demanding power applications requiring excellent current delivery, strong voltage tolerance, and stable thermal behavior. It is widely used in audio amplifier output stages, motor control circuits, power supplies, battery charging units, and various heavy-duty industrial electronics. With its rugged TO-220 packaging and robust electrical performance, the 2N6491 is commonly paired with complementary NPN devices to deliver efficient and balanced push-pull output stages.

2N6491 PNP Transistor

Pinout of 2N6491

Pin Configuration of 2N6491 Pinout

Understanding the 2N6491 Pinout Configuration

The 2N6491 is built in a TO-220 package and uses a B-C-E (Base-Collector-Emitter) pin configuration when viewed from the front with the pins facing downward. Understanding this pin arrangement is critical for proper installation on amplifier boards, switching power circuits, and high-current control modules.

Key Features of 2N6491 Transistor

• High-power PNP operation for demanding circuits
• Reliable thermal and electrical stability
• Suitable for complementary amplifier designs
• Excellent behavior in both switching and linear modes
• Durable construction for industrial and automotive use
• Supports a wide variety of power control applications

2N6491 Transistor Datasheet and Specifications

• PNP Silicon Power Transistor
• Collector-Emitter Voltage (VCEO): 80V
• Collector-Base Voltage (VCBO): 90V
• Emitter-Base Voltage (VEBO): 5V
• Collector Current (IC): 15A
• Total Power Dissipation (Ptot): 75W
• DC Current Gain (hFE): As per datasheet, varies with current levels
• Operating Junction Temperature: Up to 150°C
• Package Type: TO-220
• Pin Configuration: B-C-E (from left to right, facing front)

Working Principle of 2N6491 Transistor

The 2N6491 operates as a PNP BJT, where current flows from emitter to collector when a small base current is drawn out of the base terminal. In saturation mode, it acts as a low-loss power switch suitable for high-current loads. In linear operation, it provides clean and stable amplification, ideal for audio amplifier output stages and regulated power circuits. Its ability to handle high current and power dissipation makes it reliable in heavy-duty electrical systems.

More Circuit Layouts

Applications of 2N6491 Transistor

• High-power audio amplifier output stages (PNP side)
• Motor drivers and control circuits
• Battery charging and power regulation units
• Switching regulators and SMPS circuitry
• Industrial inverter and converter systems
• High-current general-purpose switching

Equivalent and Alternative Transistors

Common equivalents and substitutes include:

• 2N6490 (sister device with similar ratings)
• BD250 series
• MJE15031 series
• TIP42C (lower current substitute)
• MJ15016 (higher-power alternative, depending on design)

Always check voltage ratings and pin configuration before replacement.

Frequently Asked Questions (FAQ)

Q1: What is the pinout of the 2N6491?
The transistor uses a B-C-E configuration in a TO-220 package.

Q2: Where is the 2N6491 commonly used?
It is widely used in complementary audio stages, switching circuits, and industrial power electronics.

Q3: Does the 2N6491 require a heatsink?
Yes, a heatsink is important when operating under high load or continuous duty.

Q4: Can it be used for high-current switching?
Yes, it is designed to handle strong currents and efficient switching performance.

Q5: What is its complementary NPN transistor?
The complementary NPN device is typically the 2N6488.

Conclusion

The 2N6491 PNP power transistor is a durable and efficient component ideal for audio, switching, and industrial power systems. With strong current capability, stable voltage handling, and a rugged TO-220 package, it remains a reliable choice for demanding applications. Understanding its pinout, specifications, and behavior ensures optimal performance in any power electronics design.

Datasheet & Pinout of 2N6491 PNP Transistor

Click the following Button to download the datasheet of 2N6491 Transistor :

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