How to Choose the Right Diode
How to Choose the Right Diode Diodes are electronic one-way valves, letting current flow in one direction but not the reverse. If you're designing a circuit that uses them, you'll need to know they have limits. They can handle a rated maximum current, and if you exceed this limit you'll destroy the part. They also have a reverse voltage limit, past which they will start conducting, possibly with damaging results. And diodes come in several different physical case styles, with leads or in a surface-mount (SMD) case. Things You'll Need Pencil and paper Calculator Circuit schematic Semiconductor catalog Instructions Evaluate the schematic at the point where the diode will be located. Determine the maximum current that will be flowing through that point and write the figure down. Determine the maximum voltage that the diode will have to sustain. Voltages are differences in potential between two points, so if one side of the diode is at 25 volts ...