What this part is — and what it does on the board
The Infineon BFP720H6327 is an NPN silicon-germanium (SiGe) RF transistor designed for low-noise amplification from VHF through X-band. Its 45 GHz transition frequency and noise figure as low as 0.4 dB at 150 MHz make it a candidate for the first LNA stage in base-station receivers, satellite downconverters, and 5G massive-MIMO front-ends. The 4.7 V collector-emitter breakdown and 25 mA maximum collector current suit it for low-voltage, moderate-gain blocks where headroom is tight and noise dominates the link budget.
Gain and noise — the numbers that drive the BOM decision
The 10.5 dB to 28.5 dB gain range covers the spread from a low-gain buffer to a high-gain preamp, depending on bias and frequency. The noise figure floor of 0.4 dB at 150 MHz and 0.95 dB at 10 GHz means this transistor can serve both a 150 MHz IF strip and a 10 GHz downconverter without swapping parts — a useful cross-band flexibility for multi-band radio designs. The 160 minimum DC current gain at 13 mA, 3 V confirms the part has enough beta to work with a simple collector-feedback bias network.
Lifecycle and sourcing — active, no LTB clock ticking
The BFP720H6327 carries an active product status. No last-time-buy notice is on record, and no official successor has been announced.