BFU550WX

Overview

The BFU550WX is an NPN silicon RF transistor designed for high-speed, low-noise applications in a plastic SOT323 (SC-70) package. It features 11 GHz transition frequency and AEC-Q101 automotive qualification. Key electrical parameters include a maximum collector-emitter voltage of 12 V, maximum collector current of 50 mA, and total power dissipation of 450 mW. The device offers a minimum noise figure of 0.6 dB at 900 MHz and a maximum stable gain of 18 dB at the same frequency. DC current gain ranges from 60 to 200 at 15 mA and 8 V.

Feature Summary

• AEC-Q101 qualified for automotive reliability
• Low noise figure optimized for sensitive receiver stages
• High breakdown voltage suitable for elevated supply requirements
• Silicon technology supporting wideband operation up to 2 GHz

Applications

• Broadband amplifiers operating up to 2 GHz
• Low noise amplifiers for ISM band applications
• ISM band oscillators requiring high supply voltages

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'WX' matches the required packaging format. Check the latest product status on official NXP documentation as availability may vary. Ensure handling precautions for electrostatic discharge are followed during storage and assembly.

Selection Notes

Select this component for designs requiring low noise performance combined with high breakdown voltage capabilities. Evaluate thermal management requirements based on the 450 mW power dissipation limit and junction-to-solder point thermal resistance. Consider the SOT323 package dimensions for PCB layout constraints. Verify biasing conditions against the recommended operating characteristics for optimal gain and linearity.

Part Context

The BFU550W belongs to the BFU5 family of transistors, which are engineered for small signal to medium power RF applications. This series provides consistent performance across variants like the BFU520W and BFU530W. The BFU550WX specifically denotes the surface-mount version packaged in SOT323, offering a compact solution for modern electronic designs.

Replacement Considerations

Direct substitutes within the BFU5 family include BFU520W and BFU530W, though their specific electrical limits differ. Verify pin compatibility and thermal characteristics when considering alternative packages or manufacturers. Cross-reference datasheets for matching noise figures and gain specifications.