Transistor C4273 NPN 5A 400V

The Transistor C4273 is a high-voltage NPN transistor engineered for demanding power and switching applications where both high current and high voltage are required. With a collector current capacity of 5A and a collector-emitter voltage rating of 400V, this transistor delivers exceptional efficiency, durability, and reliability. The Transistor C4273 is widely used in power amplifiers, inverters, power supply circuits, and industrial control systems where stable high-voltage operation and strong thermal endurance are crucial.

Key Features

• Type: NPN Silicon Power Transistor

• Collector Current (Ic): 5A continuous

• Collector-Emitter Voltage (Vce): 400V

• Collector-Base Voltage (Vcb): 450V

• Emitter-Base Voltage (Veb): 5V

• DC Current Gain (hFE): 40 – 160 (depending on current and voltage)

• Transition Frequency (fT): 10 MHz typical

• Package Type: TO-3P or TO-247 for optimal heat dissipation and reliability

Advantages

• High collector-emitter voltage rating of 400V, ensuring excellent performance in high-voltage circuits.

• Strong collector current capability up to 5A, suitable for medium-to-high power systems.

• Excellent thermal stability and mechanical durability for long operational life.

• Low saturation voltage, improving energy efficiency and reducing heat loss.

• Optimized for audio power amplifiers, switching power supplies, and industrial drivers.

Applications

• Power Amplifiers: Ideal for high-fidelity audio amplifiers requiring strong voltage tolerance and linearity.

• Inverter Circuits: Operates efficiently in high-voltage inverter and conversion systems.

• Switching Regulators: Provides stable performance in power control and regulation systems.

• Motor Control Systems: Suitable for DC motor drives and industrial automation applications.

• Power Supply Circuits: Used for AC–DC and DC–DC converters requiring robust transistor control.

Electrical Characteristics (Typical Values at 25°C)

Datasheet Summary

• Model: C4273

• Polarity: NPN

• Collector-Emitter Voltage (Vce): 400V

• Collector Current (Ic): 5A

• Power Dissipation: 80W

• Transition Frequency: 10 MHz

• Package Type: TO-3P or TO-247

• Complementary Pair: A1659 (PNP transistor)

• Operating Temperature: -55°C to +150°C

Conclusion

The Transistor C4273 is a high-efficiency NPN transistor built for power-driven and high-voltage electronic applications. Its 5A current handling capacity and 400V tolerance make it a trusted component for engineers designing robust amplifiers, industrial control units, and switching systems. With its superior heat management, low power loss, and reliable operation, the Transistor C4273 NPN 5A 400V guarantees consistent performance and longevity—ideal for both professional and industrial-grade electronic designs.