BUF420AW

Single Bipolar Transistors Overview

The BUF420AW is an NPN high-voltage power transistor manufactured by STMicroelectronics using High Voltage Multi Epitaxial Planar technology. It features a Cellular Emitter structure with planar edge termination to enhance switching speeds while maintaining a wide Reverse Biased Safe Operating Area (RBSOA). The device is housed in a TO-247-3 through-hole package. Key electrical parameters include a maximum collector-emitter voltage (VCEO) of 450 V, a continuous collector current of 30 A, and a power dissipation rating of 200 W. The saturation voltage is specified at 800 mV, with a maximum operating temperature of +150°C.

Single Bipolar Transistors Feature Summary

• High switching speed capability enabled by cellular emitter structure
• High voltage capacity suitable for demanding power applications
• Low base-drive requirement for efficient control
• Wide Reverse Biased Safe Operating Area (RBSOA)

Single Bipolar Transistors Applications

• High-frequency power supplies
• Motor control applications

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix and RoHS compliance status directly against the manufacturer's official datasheet or authorized distributor documentation before procurement. Ensure that the TO-247-3 package dimensions and thermal characteristics match the target PCB layout and heatsinking requirements. Confirm that the component meets all relevant safety and environmental regulations applicable to the final equipment deployment region.

Single Bipolar Transistors Selection Notes

Select this component when designing circuits requiring high voltage blocking capabilities combined with fast switching performance. The 450 V rating and 30 A current handling make it suitable for robust power conversion stages. Consider the thermal management needs associated with the 200 W dissipation rating and ensure adequate heat sinking is provided to maintain junction temperatures within the specified +150°C limit during operation.

Single Bipolar Transistors Part Context

The BUF series from STMicroelectronics is engineered specifically for high-frequency power supplies and motor control systems. These transistors utilize advanced epitaxial planar technology to achieve superior switching characteristics compared to standard bipolar devices. The design focuses on minimizing switching losses while maintaining reliability under high-stress operating conditions typical in industrial and consumer power electronics.

Single Bipolar Transistors Replacement Considerations

Consult official STMicroelectronics substitution guides or cross-reference databases for verified alternative part numbers. Do not assume functional compatibility based solely on similar pinouts or generic specifications without verifying electrical parameters and package compatibility.