Small-signal Schottky pair for low-voltage rail protection
The Infineon BAT5404WH6327XTSA1 is a dual Schottky diode in a series pair configuration, housed in a surface-mount SOT-323 (PG-SOT323) package. Rated for a DC reverse voltage of 30 V and an average rectified current of 200 mA per diode, it delivers a forward voltage drop of 800 mV at 100 mA and a reverse recovery time of 5 ns. This combination suits low-voltage OR-ing, clamp protection, and small-signal rectification in battery-powered or space-constrained designs.
The 30 V reverse voltage covers low-voltage rails with margin. The 200 mA average current per diode is a small-signal rating. The 800 mV forward drop at 100 mA is typical for a Schottky at this current level. The 5 ns trr keeps switching losses low in DC-DC converters and snubber circuits operating above 100 kHz.
The SOT-323 footprint (SC-70 equivalent) is a common small-signal package. The series-connected pair shares a common cathode? No — the two diodes are connected in series (anode of diode 1 to cathode of diode 2). Verify the pinout against your PCB layout before placing; the SOT-323 pin 1 identifier is standard. The part ships on Tape & Reel (Cut Tape available), compatible with automated pick-and-place.