The BUL129D is a silicon NPN power transistor designed for high voltage and fast-switching applications. Manufactured by STMicroelectronics, a global semiconductor leader, this device is part of a series of power transistors intended for use in a wide array of electronic equipment, including lighting solutions, switching regulators, motor control systems, and inverter circuits.

Key Features

• Voltage Capabilities: The BUL129D boasts a collector-emitter voltage (V<sub>CEO) of 400V, providing a robust solution for circuits operating at high voltages.
• Current Handling: With a collector current (I<sub>C) rating of up to 8A, it can handle significant power in a variety of applications.
• Speed: It features high-speed switching, with a typical fall time (t<sub>f) as low as 0.7µs, making it suitable for high-frequency operations.
• Power Dissipation: The BUL129D has a power dissipation (P<sub>D) of 70W, ensuring reliable performance even in demanding situations.
• Package: It is available in a TO-220 package, which is widely used and well-suited for through-hole mounting, facilitating easy integration into various circuit designs.

Applications

The BUL129D is versatile and can be used in a range of applications including:

• Electronic Ballasts for Fluorescent Lighting
• Switch Mode Power Supplies (SMPS)
• DC-DC Converters
• Motor Control Circuits
• High-Frequency Inverters

Quality and Reliability

STMicroelectronics is known for its commitment to quality and reliability, and the BUL129D is no exception. It is designed to meet the stringent requirements of industrial applications and is characterized by its robustness and long operational life. The device also features inherent ruggedness, making it resistant to the harsh conditions often encountered in industrial environments.

For designers and engineers looking for a high-performance power transistor capable of withstanding high voltages and currents while offering fast switching speeds, the BUL129D from STMicroelectronics presents an excellent choice. Its combination of features ensures that it can be relied upon to deliver efficiency and durability in a wide range of electronic applications.