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The symbol 'A' indicates that this device is made from germanium . as you may know germanium has less cut in voltage so this device is used for low power signal or for signal processing. also the leakage current or reverse saturation current of germanium is greater than silicon.

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Q: What is represented by 'A' in 'OA79' diode?
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Related questions

What is O in oa79 diode?

In general O in diodes stands for germanium.since OA79 is a germanium diode O stands for germanium


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