The Infineon BAS40-04E6327 is a dual Schottky diode in a series configuration, housed in a PG-SOT23-3-11 surface-mount package. It is rated for 40 V reverse voltage and 120 mA average rectified current per diode, with a forward drop of 1 V at 40 mA. The series pair arrangement is common in clamping networks, bias steering, and low-loss rectification in battery-powered or signal-conditioning circuits where two Schottky diodes are needed in series and board space is tight.
40 V, 120 mA — the operating envelope
The 40 V reverse voltage and 120 mA forward current place this part firmly in the small-signal category. It is not a power rectifier — the 120 mA average rating means it handles logic-level loads, sensor outputs, and protection clamps, not bulk power conversion. The 1 µA leakage at 30 V reverse is typical for a Schottky of this voltage class and keeps standby drain low in battery-operated designs.
For a procurement manager qualifying a BOM, this means no near-term supply risk from discontinuation.