What this diode is and where it fits
The HVU350BTRF-E is a variable capacitance diode — a varactor — used for voltage-controlled tuning in RF circuits such as VCOs, filters, and phase shifters. Its capacitance changes with applied reverse bias, making it a solid-state replacement for mechanical trimmers in oscillator and filter tuning stages. The part is listed as active in production and carries a ROHS3 compliance rating, so it fits current RoHS-directed BOMs without a waiver.
Sourcing and lifecycle posture
It is ROHS3 compliant, which means it meets the latest EU RoHS directive without exemptions.