BFX34

Single Bipolar Transistors Overview

The BFX34 is a silicon epitaxial planar NPN transistor housed in a JEDEC TO-39 metal case, designed for high-current applications. It features a collector-emitter voltage (VCEO) of 60 V and a maximum collector current (IC) of 5 A. The device exhibits very low saturation voltage and high speed at high current levels. Key electrical characteristics include a DC current gain (hFE) ranging from 40 to 150, a transition frequency (fT) up to 100 MHz, and a total dissipation of 5 W at a case temperature of 25 °C.

Single Bipolar Transistors Feature Summary

• Very low saturation voltage and high speed at high current levels
• Designed for high-current applications with robust thermal performance
• JEDEC TO-39 metal case construction

Single Bipolar Transistors Applications

• Power drivers
• Power amplifiers
• Switching power supplies
• Relay drivers
• Inverters

Single Bipolar Transistors Procurement Notes

Verify the component matches the STMicroelectronics datasheet specifications, specifically the TO-39 package and NPN configuration. Confirm that the manufacturer marking aligns with official STMicroelectronics identification standards. Ensure the part meets the required electrical parameters for your specific circuit design before integration.

Single Bipolar Transistors Selection Notes

Select this component when high current handling capability up to 5 A is required alongside fast switching speeds. The TO-39 metal package provides effective heat dissipation for power driver and amplifier applications. Consider the low saturation voltage for improved efficiency in switching power supply designs where minimizing conduction losses is critical.

Single Bipolar Transistors Part Context

The BFX34 belongs to the category of general-purpose high-current silicon NPN transistors. It utilizes an epitaxial planar process technology to achieve reliable performance under demanding electrical conditions. The TO-39 metal case offers mechanical durability and thermal stability suitable for industrial and commercial power electronics environments.

Single Bipolar Transistors Replacement Considerations

Cross-reference with other NPN transistors offering similar VCEO ratings and IC capabilities. Verify pinout compatibility and thermal resistance values to ensure seamless substitution in existing power driver or amplifier circuits without redesigning the heatsinking infrastructure.

Single Bipolar Transistors FAQ

What is the maximum collector current rating for the BFX34?

The BFX34 supports a maximum collector current (IC) of 5 A.

Does the BFX34 use a plastic or metal package?

The BFX34 is housed in a JEDEC TO-39 metal case.

What is the typical transition frequency of the BFX34?

The transition frequency (fT) is specified up to 100 MHz at a collector current of 0.5 A.