What this RF transistor is and where it fits
The Infineon BFP540FESDH6327XTSA1 is an NPN silicon RF bipolar transistor designed for low-noise amplifier and oscillator stages up to C-band. Its 30 GHz transition frequency and 20 dB gain make it a fit for LNA front-ends in base stations, satellite receivers, and wireless infrastructure where noise figure matters — 0.9 dB typ at 1.8 GHz keeps the receive path sensitive. The 4-TSFP package with flat leads is a surface-mount footprint common in compact RF modules; store the reels dry — moisture-sensitive level is not stated, but standard MSL handling applies for a plastic SMD package.
Lifecycle and sourcing reality
This part is listed as Active in production — no end-of-life notice on record. ROHS3 compliant, so it passes the current EU restriction directive. For volume or scheduled BOM lines, we source and quote to order through independent distribution; availability and current pricing confirmed at quote time. No official second-source or pin-compatible replacement is listed in the Infineon portfolio, so dual-sourcing would require a same-function RF transistor from another vendor with careful RF layout revalidation.