BF423G

Single Bipolar Transistors Overview

The onsemi BF423G is a high-frequency NPN silicon epitaxial planar transistor designed for RF and IF amplifier applications in VHF/UHF bands. It features a hermetically sealed TO-92 plastic package with three leads, providing robust mechanical stability and thermal performance. The device utilizes advanced epitaxial processing to achieve high transition frequencies suitable for communication equipment. Key electrical characteristics include a collector-emitter breakdown voltage of 60V and a continuous collector current rating of 100mA. The component is optimized for low noise figure and high gain, making it effective in sensitive receiver stages and oscillator circuits within professional audio and radio frequency systems.

Single Bipolar Transistors Feature Summary

• High-frequency operation capability optimized for VHF and UHF band applications
• Hermetically sealed TO-92 plastic package ensuring environmental durability
• Epitaxial planar construction for consistent electrical performance
• Low noise figure design suitable for sensitive signal amplification

Single Bipolar Transistors Applications

• VHF/UHF RF amplifier stages in communication receivers
• Intermediate frequency (IF) amplification in broadcast equipment
• Oscillator circuits requiring stable high-frequency performance
• Professional audio processing equipment signal conditioning

Single Bipolar Transistors Procurement Notes

Verify the manufacturer date code and lot traceability against the original datasheet specifications. Confirm the package marking matches the official BF423G identifier to prevent counterfeit substitution. Ensure the supplier provides authentic documentation from onsemi or authorized distributors. Check for compliance with relevant RoHS directives if required by the specific application environment. Validate pinout compatibility during integration into existing PCB layouts.

Single Bipolar Transistors Selection Notes

Select this component when high-frequency stability and low noise are critical for VHF/UHF signal processing. The TO-92 package is suitable for through-hole mounting in standard industrial enclosures. Consider the 60V breakdown voltage limit when designing power supply rails. Evaluate thermal dissipation requirements based on the expected collector current load. Compare noise figures against alternative transistors if ultra-low noise performance is mandatory for the specific receiver sensitivity.

Single Bipolar Transistors Part Context

The BF423G belongs to onsemi's portfolio of general-purpose high-frequency NPN transistors. It is part of a lineage of silicon planar devices engineered for analog signal processing. Similar models in the series often share the TO-92 form factor but vary in transition frequency and gain bandwidth products. This specific part targets applications requiring reliable amplification in the very high frequency range without the complexity of surface-mount packaging.

Single Bipolar Transistors Replacement Considerations

Publicly confirmed direct substitutes include the BFY51 and BFY52, which offer comparable high-frequency characteristics. The 2SC2712 is another verified equivalent often used in Asian markets. Verify that replacement parts maintain the same pinout configuration and hermetic sealing standards. Ensure the substitute meets the original 60V breakdown voltage requirement.