I'm in search of a direct diode replacement for the D1 on this PCB (please see pics).
Numbers on the diode are "G30" and "GP651".
Can't seem to locate a precise, direct diode replacement. I believe it to be a Schottky diode?
Could you suggest a suitable replacement?

Thank you

STPS2L30A, STMicroelectronics, Schottky rectifier, 30V, 2A, low drop, marking G30, SMA:
https://www.st.com/resource/en/datasheet/stps2l30.pdf

If the diode measures as a short circuit, it could actually be a shorted load, eg the MCU. Do not power up the PCB without this diode, otherwise you risk damaging the MCU. Just FYI, this component is the freewheel diode in a buck converter, not a TVS diode.

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A backup a day keeps DR away.

Excellent, Fzabkar.
Thank you for responding and the helpful info. Just what I was looking for.