14 GHz fT, 1.1 dB NF — L-band and S-band LNA core
The BFR380FH6327XTSA1 is an NPN RF transistor with a 14 GHz transition frequency, placing it squarely in the small-signal gain stage for L-band (1-2 GHz) and S-band (2-4 GHz) receiver front-ends. The 1.1 dB typical noise figure at 1.8 GHz sets the cascaded noise floor for the first LNA stage — every 0.1 dB here directly adds to the system noise figure. Gain spans 9.5 dB to 13.5 dB across the band, so the cascade budget for a two-stage LNA starts with at least 19 dB of block gain before mixer conversion loss. The 9 V collector-emitter breakdown and 80 mA maximum collector current bound the operating region to small-signal levels — this is not a driver or power stage.
PG-TSFP-3 footprint and thermal budget
Housed in the PG-TSFP-3 package (SOT-723 variant), the transistor occupies a 1.2 mm × 1.2 mm footprint with three leads — collector, base, emitter. The surface-mount assembly suits compact RF modules where board area is at a premium, but the 380 mW maximum power dissipation means the copper pad area under the collector tab must be sized to keep the junction below 150°C in the target ambient. DC current gain is guaranteed at 90 minimum when biased at 40 mA collector current and 3 V Vce — this hFE floor lets the bias network be designed for a known beta range, avoiding saturation or cutoff drift over temperature.
Active lifecycle, ROHS3 compliance
The BFR380FH6327XTSA1 carries an active product status, supporting ongoing design-in and production builds. ROHS3 compliance covers the EU RoHS exemption list through 2024, so the part clears global regulatory acceptance without a waiver.