Why the 70 V rating matters for your protection clamp
The BAS70ZFILM is a small-signal Schottky diode from STMicroelectronics, rated for 70 V DC reverse voltage and 70 mA average rectified current. The 2 pF junction capacitance at 0 V (1 MHz) keeps signal edges clean.
Parametric deep-dive: leakage, forward drop, and capacitance
Reverse leakage is 10 µA at 70 V — acceptable for most signal-level clamps, but if your circuit idles at elevated temperatures, remember that Schottky leakage doubles with every 10 °C rise. Forward voltage is 1 V max at 15 mA, typical for a small-signal Schottky. The 2 pF capacitance at zero bias means this diode can sit on a 10 MHz clock line without distorting the waveform.
Lifecycle reality: obsolete, sourced to order
STMicroelectronics lists the BAS70ZFILM as obsolete.