BFG424F,115

Overview

The BFG424F is an NPN double polysilicon wideband transistor featuring a buried layer, designed for low voltage applications. It is housed in a plastic SOT343F package with reverse pinning and four leads. The device supports a collector current of up to 30 mA and a total power dissipation of 135 mW at a solder point temperature of 90 °C. Key electrical characteristics include a transition frequency of 25 GHz, a maximum power gain of 23 dB at 2 GHz, and a noise figure as low as 0.8 dB at 900 MHz. Limiting values specify a collector-base voltage of 10 V and a collector-emitter voltage of 4.5 V.

Feature Summary

• Very high power gain suitable for RF amplification
• Low noise figure for sensitive signal reception
• High transition frequency enabling wideband operation
• Emitter serves as the thermal lead for efficient heat dissipation

Applications

• Radio Frequency (RF) front end wideband applications
• Analog and digital cellular telephones
• Cordless telephones including CT, PHS, and DECT systems
• Radar detectors
• Satellite Antenna TeleVison (SATV) tuners

Procurement Notes

Verify the component status on the manufacturer's official website before design finalization, as product availability may change. Ensure that handling procedures strictly adhere to ElectroStatic Discharge (ESD) precautions during transport and assembly to prevent device damage. Confirm that the SOT343F package dimensions match the target PCB footprint requirements.

Selection Notes

Select this transistor for low voltage RF circuits requiring high gain and low noise performance. Verify that the operating collector current remains within the specified range to maintain optimal transition frequency and power gain characteristics. Ensure the thermal management design keeps the solder point temperature below 90 °C to support the rated total power dissipation limit.

Part Context

The BFG424F belongs to NXP's portfolio of NPN wideband transistors utilizing double polysilicon technology. This specific model is engineered for cost-effective, high-performance RF solutions in consumer electronics. It complements other discrete RF components by providing reliable amplification in compact surface-mount packages suitable for modern portable devices.

Replacement Considerations

Consult the official NXP datasheet or authorized distributors for verified substitute part numbers. Do not assume functional equivalence with generic NPN transistors without verifying RF parameters such as transition frequency and noise figure against the original specifications.