STMicroelectronics

BUV20

BUV20 Description

The BUV20 from STMicroelectronics is a high-power NPN bipolar junction transistor (BJT) designed for demanding industrial and automotive applications. Packaged in a rugged TO-3 chassis-mount format, it delivers a collector-emitter breakdown voltage (V_CEO) of 125V and a maximum collector current (I_C) of 50A, making it suitable for high-current switching and amplification. With a transition frequency (f_T) of 8MHz, it balances speed and power efficiency. The device operates reliably up to 200°C junction temperature (T_J), ensuring robustness in harsh environments.

BUV20 Features

• High Power Handling: 250W maximum power dissipation for heavy-duty applications.
• Low Saturation Voltage: 1.2V @ 5A base current (I_B) and 50A collector current (I_C), minimizing conduction losses.
• High DC Current Gain (h_FE): 20 @ 25A, 2V, ensuring efficient current amplification.
• Wide Operating Temperature: -55°C to 200°C for extreme conditions.
• Compliance: ROHS3 and REACH Unaffected, meeting environmental standards.
• Low Leakage: 3mA maximum collector cutoff current (I_CEO).

BUV20 Applications

• Power Supplies: High-efficiency switching in DC-DC converters and linear regulators.
• Motor Control: Drive circuits for industrial motors and automotive actuators.
• Audio Amplifiers: High-fidelity Class AB/B output stages.
• Inductive Load Switching: Relays, solenoids, and ignition systems.
• Obsolete but Reliable: Ideal for legacy systems requiring TO-3 compatibility.

Conclusion of BUV20

The BUV20 stands out for its high current capability, low saturation voltage, and thermal resilience, making it a preferred choice for high-power, high-reliability applications. While marked obsolete, its performance in rugged environments and compatibility with legacy designs ensure continued relevance. Engineers seeking a robust, high-gain NPN transistor for industrial or automotive systems will find the BUV20 a dependable solution.