The Infineon BAT54-03WE6327 is a Schottky diode rated for a DC reverse voltage of 30 V and an average rectified current of 200 mA. Its forward voltage drop is 800 mV maximum at 100 mA, and it offers a reverse recovery time of 5 ns. This combination makes it suitable for high-speed switching, polarity protection, and clamping circuits in low-voltage DC rails up to 30 V.
The 30 V reverse voltage rating defines the maximum DC rail this diode can block — it will handle 24 V and 12 V systems with margin, but not a 48 V bus. The 200 mA average forward current is the continuous load limit; for pulsed or surge conditions you derate based on junction temperature, but this is not a high-current power rectifier. The 800 mV forward drop at 100 mA is typical for a Schottky in this current class — it means about 80 mW dissipation at full rated current, so the SOD-323 package can handle it without external heatsinking. The 5 ns reverse recovery time is fast enough for switching frequencies in the low-MHz range, making it a good fit for flyback snubbers or DC-DC converter catch diodes.
This diode is supplied in a SOD-323 (PG-SOD323-2) surface-mount package. The footprint is standard for small-signal Schottky diodes; it reflows with typical lead-free profiles. The supplier device package code PG-SOD323-2 is Infineon's internal designation — it is the same mechanical outline as industry-standard SOD-323.