Active production, automotive-qualified RF transistor
The BFU520WX: With a 10 GHz transition frequency and 0.6 dB noise figure at 900 MHz, it is designed for low-noise amplifier stages in automotive RF front-ends, GPS receivers, and ISM-band radios up to the UHF range. The 18.5 dB gain at the collector current bias point gives enough headroom to lift a weak antenna signal to a usable level before the mixer stage, reducing the cascaded noise figure of the receiver chain.
Parametric fit for RF front-end designs
Rated for 12 V collector-emitter breakdown and 30 mA maximum collector current, the BFU520WX suits low-power LNA and driver stages where the supply rail is 3.3 V or 5 V, with the 450 mW power dissipation limiting the bias point in the SC-70 package. The minimum DC current gain of 60 at 5 mA, 8 V ensures consistent bias across the temperature range from -40°C to 150°C, which is the full automotive Grade 1 ambient band for under-hood or engine-bay modules. Housed in the SC-70 (SOT-323) surface-mount package, the part fits compact RF modules where board space is tight and the collector pad can be tied to the ground plane for thermal relief.
Compliance and sourcing posture
The BFU520WX is ROHS3 compliant and carries the AEC-Q101 automotive qualification, meaning it has passed the stress tests and reliability screening required for automotive-grade discrete semiconductors. Available in Tape & Reel or Cut Tape packaging, this part is quoted to order against BOM quantities through independent distribution channels, with current pricing and lead time confirmed at the time of RFQ.