I want to add reverse voltage polarity protection into my circuit to protect the components in my Arduino robot. But i want to know which diode has the edge on the other: SB140 or 1N5819? Or is there another even better diode for this application?
Here are the datasheets for both mentioned diodes.
From my understanding, i would need to use a diode that has a very low forward voltage drop, but from the datasheets, it seems that both diodes have about the same Vf and both have a Peak Repetitive Reverse Voltage of 40 V which i think should be enough for my battery-powered robot with 12 V. Are there any other characteristics that i should be considering to justify the choice of diode?