The BUF420AI is a high-performance NPN bipolar power transistor designed by STMicroelectronics, a global leader in semiconductor solutions. This component is engineered to address applications requiring high voltage capability and fast switching performance. It is particularly suitable for electronic ballasts, flyback converters, and switch-mode power supplies.

Key Features

• Voltage Capabilities: The BUF420AI boasts a collector-emitter voltage (V_CEO) of up to 450V, making it an excellent choice for circuits operating at high voltages.
• Current Handling: With a collector current (I_C) rating of 20A, this power transistor can handle significant current loads, which is essential for power regulation and conversion applications.
• Speed: A fast-switching speed is one of the BUF420AI's standout features, ensuring efficient operation in high-frequency circuits.
• Power Dissipation: The device has a high power dissipation capability of 190W, allowing it to manage considerable power levels without overheating.
• Package: Housed in a robust ISOWATT218 package, the BUF420AI is designed for optimal heat dissipation and space-saving on the PCB.

Applications

• Electronic Ballasts for Fluorescent Lighting
• Flyback Converters
• Switch-Mode Power Supplies (SMPS)
• Power Inverters
• High Voltage Power Switching

Reliability and Quality

As with all STMicroelectronics components, the BUF420AI is manufactured to high standards of quality and reliability. It is designed to withstand harsh operating conditions and provide a reliable solution for high-voltage and high-speed switching applications. The product is also supported by STMicroelectronics' comprehensive technical documentation and application support, ensuring ease of integration into various designs.

Summary

The BUF420AI from STMicroelectronics is a robust and versatile NPN power transistor that offers high voltage and current handling capabilities, fast switching speeds, and efficient power dissipation. Its suitability for a range of demanding applications, combined with the quality assurance of STMicroelectronics, makes it a top choice for designers seeking a reliable high-voltage switching solution.