The BUL128D-B is a high voltage fast-switching NPN power transistor manufactured by STMicroelectronics, a global leader in semiconductor solutions. This device is specifically designed to suit a wide range of applications requiring high performance and reliability, including lighting solutions, switching regulators, and power management systems.

Key Features

• Voltage Capabilities: The BUL128D-B boasts a collector-emitter voltage (V<sub>CEO) of 450V, providing ample headroom for high voltage applications.
• Current Handling: With a collector current (I<sub>C) of up to 8A, this power transistor can handle significant levels of current, making it suitable for demanding power applications.
• Speed: A fast-switching device, the BUL128D-B has a low collector-emitter saturation voltage and is designed for high-speed switching applications, ensuring efficient operation with minimal losses.
• Power Dissipation: It has a power dissipation (P<sub>D) of 70W, which allows it to manage considerable amounts of power without compromising the integrity of the device.

Applications

The versatility of the BUL128D-B makes it suitable for a broad spectrum of applications, including:

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

Reliability and Quality

STMicroelectronics is committed to delivering products that meet the highest standards of quality and reliability. The BUL128D-B is no exception, as it is built to ensure long-term stability and performance under a wide range of operating conditions. Its robust construction and adherence to stringent quality controls make it a reliable choice for critical applications where failure is not an option.

Environmental Compliance

The BUL128D-B is in compliance with RoHS (Restriction of Hazardous Substances) directives, making it an environmentally friendly choice for manufacturers looking to create sustainable products without compromising on performance.