Small-signal Schottky for low-voltage rail protection and switching
The Infineon BAT54WH6327 is a small-signal Schottky diode in a three-lead SC-70 / SOT-323 package (PG-SOT323-3). It is specified for a maximum reverse voltage of 30 V and an average rectified current of 200 mA, with a forward voltage drop of 800 mV at 100 mA. The reverse recovery time is 5 ns, and junction capacitance measures 10 pF at 1 V and 1 MHz. This part is typically used for low-voltage rail protection, polarity protection, and high-speed switching in compact designs where board area is tight.
The 30 V reverse voltage rating sets the maximum DC blocking voltage this diode can withstand. In a 5 V or 3.3 V rail, that gives comfortable headroom for transient spikes. The 200 mA average forward current is the continuous load limit; peak repetitive currents can be higher but should be checked against the datasheet's surge rating. The 5 ns reverse recovery time means it switches fast enough for low-frequency rectification and general-purpose clamping, though it is not rated for high-frequency switching supplies.
Package and footprint: SC-70 / SOT-323 (PG-SOT323-3)
The BAT54WH6327 is supplied in a surface-mount SC-70 / SOT-323 package, specifically the Infineon PG-SOT323-3 variant. This is a three-lead, small-outline package with a 1.25 mm body width and 0.65 mm lead pitch. The footprint is shared with many other small-signal diodes and transistors, making it a straightforward drop-in for board layouts that already use this common land pattern. The package is rated for a junction temperature of 150 °C.
Active lifecycle and compliance
The base product number is BAT54, and this suffix variant (WH6327) denotes the specific package and tape-and-reel configuration. The part is RoHS compliant, as is standard for Infineon's current portfolio.