7.5 GHz NPN — what the RF ratings mean for the front end
The Infineon BFP196WH6740 is an NPN silicon RF transistor in a SC-82A (SOT-343) surface-mount package, targeting low-noise amplifier and driver stages up to L-band. Its 7.5 GHz transition frequency (fT) and 19 dB gain at 900 MHz–1.8 GHz give you enough headroom for a single-stage LNA in a GPS, cellular, or ISM-band receiver front end without cascading. The 19 dB gain is measured at 50 mA collector current — typical bias for a medium-signal RF stage. With a maximum collector current of 150 mA and a 12 V Vceo breakdown, this transistor can also serve as a driver in a transmit chain up to about 20 dBm output before the gain compresses.
Automotive qualification — AEC-Q101 on the label
The junction is rated to 150°C, which covers the under-hood ambient plus self-heating in a compact SOT-343 footprint. Production status is Active, per the manufacturer's lifecycle record.
Noise figure — the spec that sets the LNA budget
Noise figure is specified at 1.3 dB to 2.3 dB across 900 MHz to 1.8 GHz, with the lower figure at 900 MHz. For a 1.5–1.6 dB cascaded noise budget in a GNSS LNA, this transistor leaves about 0.2–0.3 dB margin for the matching network and PCB loss — tight but workable with a low-loss substrate and careful input match. DC current gain (hFE) is a minimum of 70 at 50 mA, 8 V Vce. That is a beta floor, not a typical — the part will not drop below this across the temperature range, which matters for bias stability in a production RF stage where the collector current must stay within ±10 % of the design target.