I think I found the right ones on an old PC power supply. Is it okay to use them? Also, probably a dumb question, but how should the grey stripe be positioned when I solder it?...

This is the back side, and I have marked the burned diode....

I have a small food processor with two speeds, but it doesn’t handle long use very well and tends to overheat. I guess I pushed it a bit too far this time because it started smoking. After letting it cool down, I tried using it again, but only the second speed is working. The motor seems fine, but I really want both speeds to work. When I opened up the switch cover, I found a component that was completely burned out—probably a diode. I want to replace it, but I'm not sure what type I need. It’s next to the switch that’s still working, but the one on the left for speed "I" isn't...