2N5303 Pinout, Equivalent, Application, Datasheet

The 2N5303 pinout refers to a high-power NPN transistor specifically built for demanding audio, switching, and power amplifier applications. Designed in a TO-3 metal case package, the 2N5303 transistor can handle large currents up to 20A and voltage ratings up to 80V, with an impressive power dissipation of 200W. Its rugged structure and high reliability make it an excellent choice for both industrial and high-power electronic circuits.

Introduction to 2N5303 NPN Transistor

The 2N5303 NPN transistor is a silicon-based power device that combines high voltage, large current capacity, and excellent thermal efficiency. Built for heavy-duty applications such as motor drivers, inverter circuits, and high-power amplifiers, it delivers stable performance under continuous load conditions.

Encased in a TO-3 metal package, the 2N5303 offers outstanding heat dissipation through its metallic case collector connection. With proper heatsinking, this transistor can safely operate at its maximum 200W dissipation, ensuring long operational life in power control systems.

2N5303 NPN Transistor

Pinout of 2N5303

Pin Configuration of 2N5303 Pinout

Key Features of 2N5303 Transistor

• High-power NPN silicon transistor
• Excellent current handling and thermal stability
• TO-3 metal case for superior heat dissipation
• Ideal for high-current and high-voltage amplifier circuits
• Rugged and reliable for industrial applications
• Suitable for both switching and linear operation

2N5303 Transistor Datasheet and Specifications

• Transistor Type: NPN Silicon Power
• Collector-Emitter Voltage (Vce): 80V
• Collector-Base Voltage (Vcb): 80V
• Continuous Collector Current (Ic): 20A
• Total Power Dissipation (Ptot): 200W
• DC Current Gain (hFE): 20 to 70 (typical range)
• Transition Frequency (fT): 2 MHz (typical)
• Operating Junction Temperature (Tj): −65°C to +200°C
• Package Type: TO-3 Metal Case
• Pin Configuration:
  • Pin 1: Base
  • Pin 2: Emitter
  • Case: Collector

Equivalent and Alternative Transistors

Several equivalent transistors can be used as a replacement for 2N5303, depending on circuit design and power requirements. Some common equivalents include:

• MJ15003 – (140V, 20A, 250W, TO-3)
• 2N3773 – (140V, 16A, 150W, TO-3)
• 2N3055H – (60V, 15A, 115W, TO-3)
• MJ802 – (80V, 30A, 200W, TO-3)

Before using a substitute, always verify the voltage (Vce), current (Ic), and power dissipation (Ptot) ratings for compatibility with your circuit.

More Circuit Layouts

Typical Applications of 2N5303

The 2N5303 NPN power transistor is versatile and commonly used in:

• High-power audio amplifier output stages
• Motor driver and control circuits
• Power inverters and converters
• Switching regulators and DC power supplies
• RF and industrial control circuits
• High-current relay drivers

Safe Operating Tips

• Always mount the transistor on a large heatsink to manage power dissipation effectively.
• Ensure case insulation when multiple TO-3 devices share a common heatsink.
• Use flyback diodes across inductive loads to suppress voltage spikes.
• Keep the transistor within its safe operating area (SOA) to prevent thermal damage.

Conclusion

The 2N5303 transistor is a durable, high-performance NPN silicon power transistor designed for circuits demanding high current and voltage capabilities. With its TO-3 package, robust 200W power dissipation, and 20A collector current rating, it serves as an excellent choice for amplifiers, inverters, and motor control systems. Its dependability and efficiency make it ideal for professional and industrial use where consistent performance is critical.

Datasheet & Pinout of 2N5303 NPN Transistor

Click the following Button to download the datasheet of 2N5303 Transistor :

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