BFR540,215

Overview

The BFR540 is an NPN silicon planar epitaxial transistor housed in a SOT23 plastic package. It is designed for wideband RF applications operating up to 9 GHz. Key electrical parameters include a collector-base voltage (VCBO) of 20 V, a collector-emitter voltage (VCES) of 15 V, and a maximum DC collector current of 120 mA. The device supports a total power dissipation of 500 mW at a soldering point temperature of 70 °C or less. It features a minimum DC current gain (hFE) of 100 at IC = 40 mA and VCE = 8 V. The transition frequency (fT) reaches 9 GHz under standard test conditions.

Feature Summary

• High power gain suitable for RF amplification
• Low noise figure for sensitive signal reception
• High transition frequency enabling GHz range operation
• Gold metallization ensures excellent reliability

Applications

• RF front end wideband applications in the GHz range
• Analog and digital cellular telephones
• Cordless telephones (CT1, CT2, DECT)
• Radar detectors
• Satellite TV tuners (SATV)

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm availability and manufacturing origin. The component utilizes a SOT23 surface-mount package. Confirm RoHS compliance status through official documentation before integration into designs requiring restricted substance limitations.

Selection Notes

Select this component for circuits requiring high-frequency performance with low noise characteristics. Ensure the design accommodates the 15 V collector-emitter voltage limit and manages thermal dissipation effectively, as power ratings are dependent on the soldering point temperature. Verify impedance matching networks for optimal gain and stability at target frequencies.

Part Context

This device belongs to the family of NPN wideband transistors manufactured by NXP Semiconductors. It is engineered specifically for radio frequency signal processing tasks where high transition frequency and low noise are critical requirements for system performance.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Cross-referencing requires matching package type, pin configuration, and electrical limits such as VCBO, VCES, and fT specifications.