Automotive-grade Schottky pair in SOT-23
The Infineon BAS70-04B5000 is a dual Schottky diode with the two junctions connected in series inside a single PG-SOT23-3-3 surface-mount package. It is qualified to AEC-Q101, making it suitable for automotive and other high-reliability environments where the part must meet the stress and lifetime requirements of the automotive electronics council. Each diode is rated for a maximum reverse voltage of 70 V and an average rectified current of 70 mA (DC). Forward voltage is specified at 1 V maximum when carrying 15 mA. Reverse leakage is 100 nA maximum at 50 V reverse bias. The series-connected configuration is useful for applications requiring two Schottky diodes in series — for example, in clamping networks, steering diodes, or as a voltage-doubling stage — where a single SOT-23 footprint replaces two discrete diodes.
70 V blocking, 70 mA forward — what the ratings mean
The 70 V reverse voltage rating sets the maximum DC or repetitive peak reverse voltage the diode can block. The 70 mA average rectified current per diode is the DC load limit. Forward voltage of 1 V at 15 mA is typical for a small-signal Schottky — the low Vf compared to a PN-junction diode reduces conduction loss in low-current rectification or OR-ing applications. The 100 nA leakage at 50 V is low enough for battery-powered or high-impedance sense circuits where leakage current would otherwise shift bias points. Operating junction temperature is rated to 150 °C, which aligns with under-hood automotive ambient temperatures when derated for self-heating.