onsemi

BUL45D2G

BUL45D2G Description

The BUL45D2G from onsemi is a high-performance NPN bipolar junction transistor (BJT) designed for demanding power-switching applications. Packaged in a TO-220 through-hole configuration, it offers a robust 400V collector-emitter breakdown voltage (V_CEO) and a 5A continuous collector current (I_C), making it suitable for medium-to-high power circuits. With a transition frequency (f_T) of 13MHz, it balances switching speed and power handling, while its low V_CE(sat) of 500mV @ 400mA, 2A ensures efficient operation with minimal conduction losses. The device is RoHS3 compliant and REACH unaffected, meeting modern environmental standards.

BUL45D2G Features

• High Voltage & Current Rating: 400V V_CEO and 5A I_C for robust power handling.
• Low Saturation Voltage: 500mV @ 2A reduces power dissipation in switching applications.
• Fast Switching: 13MHz transition frequency enables efficient high-frequency operation.
• High DC Current Gain (h_FE): Minimum 10 @ 2A, 1V for reliable amplification.
• Thermally Efficient: 75W max power dissipation in a TO-220 package for heat management.
• Reliable & Compliant: ROHS3, EAR99, and REACH unaffected for global compatibility.

BUL45D2G Applications

• Switched-Mode Power Supplies (SMPS): High-voltage switching in offline converters.
• Motor Control: Driver stages for brushed DC motors and solenoids.
• Electronic Ballasts: Fluorescent and LED lighting systems.
• Inductive Load Switching: Relays, transformers, and inductive load drivers.
• Industrial Power Systems: Inverters, UPS, and power regulation circuits.

Conclusion of BUL45D2G

The BUL45D2G stands out as a versatile NPN BJT for high-voltage, medium-current applications, combining efficiency, speed, and thermal performance. Its low V_CE(sat) and high f_T make it ideal for energy-conscious designs, while its rugged TO-220 package ensures durability. Whether in power supplies, motor drives, or industrial systems, this transistor delivers reliable performance, backed by onsemi's quality and compliance with global standards.