onsemi

BDX54BG

BDX54BG Description

The BDX54BG from onsemi is a high-performance PNP Darlington transistor designed for robust power amplification and switching applications. With a collector-emitter breakdown voltage (Vce) of 80V and a maximum collector current (Ic) of 8A, this device is engineered to handle demanding loads efficiently. Packaged in a TO-220 through-hole mount, it offers excellent thermal dissipation, supporting a maximum power rating of 65W. The BDX54BG is characterized by its high DC current gain (hFE ≥ 750 @ 3A, 3V), ensuring minimal base drive requirements for high-current applications. Although marked as obsolete, it remains a reliable choice for legacy designs due to its ROHS3 compliance and REACH unaffected status.

BDX54BG Features

• High Voltage & Current Handling: 80V Vce and 8A Ic make it suitable for industrial and automotive applications.
• Low Saturation Voltage: 2V @ 12mA, 3A reduces power loss in switching circuits.
• Darlington Configuration: Delivers high current gain (hFE ≥ 750), minimizing drive circuit complexity.
• Robust Thermal Performance: TO-220 package ensures efficient heat dissipation for 65W max power.
• Compliance & Reliability: ROHS3 compliant, MSL 1 (unlimited shelf life), and EAR99 classification for export flexibility.

BDX54BG Applications

• Power Switching: Ideal for relay drivers, motor controllers, and solenoid actuation due to high current capability.
• Audio Amplification: Suitable for high-power audio output stages in amplifiers.
• Industrial Systems: Used in power supplies, inverters, and load switches requiring high voltage tolerance.
• Automotive Electronics: Fits ignition systems and lighting controls where rugged performance is critical.

Conclusion of BDX54BG

The BDX54BG stands out as a high-gain, high-power PNP Darlington transistor with exceptional voltage and current handling. While obsolete, its low saturation voltage, thermal efficiency, and compliance make it a dependable choice for legacy and niche applications. Engineers seeking a cost-effective, high-performance solution for power switching or amplification will find this device well-suited, particularly in industrial, automotive, and audio systems. Its TO-220 packaging further ensures durability in harsh environments.