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Diodes are usually rated in amperage. A diode may be capable of handling only a 10th of an ampere. Some diodes called Power diodes may be capable of handling up to 100 amperes per diode. To select the proper diode, you must know what the maximum amperage your circuit is capable of. Then you would select one that would handle at least 120 percent of the amperage your circuit would handle.

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Q: How do you select diode size?
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