STMicroelectronics

BUX10

BUX10 Description

The BUX10 from STMicroelectronics is a high-power NPN bipolar junction transistor (BJT) designed for demanding industrial and automotive applications. Encased in a rugged TO-3 package, it offers a robust 150W power dissipation capability, making it suitable for high-current switching and amplification. With a collector-emitter voltage (Vce) rating of 125V and a collector current (Ic) of 25A, this transistor excels in high-voltage, high-current environments. Its low Vce saturation voltage (1.2V @ 20A) ensures efficient operation, minimizing power losses. Although marked as obsolete, its reliability and performance make it a preferred choice for legacy systems.

BUX10 Features

• High Power Handling: 150W max power dissipation for heavy-duty applications.
• Low Saturation Voltage: 1.2V @ 20A, enhancing energy efficiency.
• Wide Operating Temperature: Up to 200°C junction temperature (TJ), ensuring stability in harsh conditions.
• Fast Switching: 8MHz transition frequency for responsive performance in switching circuits.
• High Current Gain (hFE): Minimum 20 @ 10A, 2V, providing strong signal amplification.
• RoHS3 Compliant & REACH Unaffected: Meets environmental standards without compromising performance.
• Chassis Mount Design: TO-3 package enables secure thermal management in high-heat scenarios.

BUX10 Applications

• Power Supplies: Ideal for linear and switch-mode power supplies due to high Vce and current ratings.
• Motor Control: Efficiently drives high-current motors in industrial automation and automotive systems.
• Audio Amplifiers: Delivers high-fidelity amplification in professional audio equipment.
• RF & Industrial Switching: Fast transition frequency suits RF amplifiers and high-speed switching circuits.
• Legacy Systems Maintenance: A reliable replacement in obsolete equipment requiring high-power BJTs.

Conclusion of BUX10

The BUX10 stands out as a rugged, high-performance NPN transistor, offering exceptional power handling, low saturation losses, and thermal resilience. While newer alternatives exist, its proven reliability in extreme conditions makes it indispensable for legacy and high-power designs. Engineers trust the BUX10 for applications demanding durability, efficiency, and high current/voltage tolerance, solidifying its role in critical electronic systems.