What this Schottky diode is for
The Infineon BAT6202VH6327XTSA1 is a small-signal Schottky diode rated for 40 V reverse voltage and 20 mA average rectified current. Its 0.6 pF capacitance at 0 V makes it a fit for RF detector, mixer, and high-speed switching circuits where low junction capacitance matters more than raw current handling. The SC-79 / SOD-523 package is tiny — about the size of a grain of sand — so it goes into compact portable gear, sensor modules, and RF front-ends where board real estate is tight.
Ratings that drive the BOM decision
The 40 V reverse voltage is the ceiling for the rail it sits on — keep it below that, and the 10 µA leakage at 40 V is typical for a Schottky of this size. The 20 mA average current means this is a signal diode, not a power rectifier; use it for clamping, detection, or steering low-current logic-level signals. Forward voltage drops 1 V at 2 mA, which is higher than some Schottkys but acceptable for the low-capacitance trade-off. The 0.6 pF capacitance is the headline number — it keeps the diode transparent at UHF frequencies, so it works in RF bias tees and detector circuits without loading the signal path.
Lifecycle and compliance
It's ROHS3 compliant, which covers the EU directive for lead-free and restricted substances — no exemption paperwork needed for shipping into regulated markets.