BFG520W,115

Overview

The BFG520W,115 is an NPN silicon planar epitaxial transistor manufactured by NXP Semiconductors. It is housed in a 4-pin dual-emitter SOT343N plastic surface-mount package. Key electrical specifications include a collector-base voltage of 20 V, a collector-emitter voltage of 15 V, and a maximum DC collector current of 70 mA. The device features a transition frequency of 9 GHz at 20 mA and 6 V. At 900 MHz with IC=20 mA and VCE=6 V, it provides a typical unilateral power gain of 17 dB and an insertion power gain of 17 dB. The minimum noise figure is 1.1 dB at 900 MHz with IC=5 mA and VCE=6 V.

Feature Summary

• High power gain suitable for RF front-end applications
• Low noise figure optimized for sensitive signal reception
• High transition frequency enabling operation up to 9 GHz
• Gold metallization structure ensuring excellent reliability

Applications

• Analog and digital cellular telephones
• Cordless telephones (CT2, CT3, PCN, DECT)
• Radar detectors
• Satellite television tuners (SATV)
• Repeater amplifiers in fibre-optic systems

Procurement Notes

Verify the specific ordering code BFG520W,115 against the manufacturer's latest product data sheet to confirm current production status and availability. Ensure that the SOT343N package dimensions and pin configuration match the design requirements. Cross-reference thermal resistance values for proper heat dissipation planning in the final assembly.

Selection Notes

Select this component for wideband RF applications requiring high gain and low noise in the GHz range. Consider the 70 mA DC collector current limit and 500 mW total power dissipation capability when designing bias circuits. Evaluate the SOT343N package size constraints and ensure compatibility with the intended PCB layout and soldering processes.

Part Context

The BFG520W belongs to the NPN 9 GHz wideband transistor family produced by NXP Semiconductors. It is designed for high-frequency performance using silicon planar epitaxial technology. The device is often compared with similar models like the BFG505W within the same product line, sharing comparable electrical characteristics and application scopes for RF front-end modules.

Replacement Considerations

Direct substitutes include the BFG520W/X variant, which shares identical electrical specifications and package type. Verify pinout compatibility and thermal characteristics before substitution. Other NXP wideband transistors may offer similar performance but require circuit re-evaluation due to potential differences in packaging or specific parameter tolerances.