Thanks for all the info Rick. All good information for me to consider.
I did end up using my meter to check the diode and it was mis-marked. Looking back, as a few posters pointed out, I
shouldn’t rely on the markings anyway. I posted some pics of my test just to verify my process.
As for the context of how the diode will be used. It will between the main power bus and avionics/ essential bus of the primary power system of my experimental plane project. The relay in the picture is the avionics relay. During engine start most avionics will be kept offline via the avionics switch/relay.
The schottky diode comes into play when the avionics/essential bus is used as an essential bus when load shed may be required…e.g.Pri Alt failure. It will prevent back-feeding of items on the main power bus.
I will attach a PDF of my primary power system plan for reference. Please feel free to comment/critique. Like I said, I’m a rookie at this stuff and enjoy learning from the comments.
Thanks again. Shawn