poll I would like to use zener diodes to protect the MCU GPIO pins when driving MOSFETs directly. Is the HZ5C2 a reasonable choice for this? I would prefer the HZ5C3 because I don't like wasting precious electrons or gate potential down the zener unnecessarily but the HZ5C2 is more readily available…

Zener voltage for protection of GPIO

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6v6gt September 11, 2021, 3:23pm 2

It is unusual to protect an output pin using a zener diode in that configuration.
What risk do you see ? A drain to gate short circuit in your mosfet ?

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Zener voltage for protection of GPIO

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