Flyback diode - Wikipedia
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flyback - Relay coil suppression - Electrical Engineering Stack Exchange
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Zener diode characteristics|experiment|Forward bias|reverse bias|tamil| zenerdiode|experiment tamil| - YouTube
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Relay Coil Suppression with single Zener Diode across BJT - Electrical Engineering general discussion - Eng-Tips
Diodes
Zener Diode Selection for Relay - Electrical Engineering Stack Exchange
The ferrite coil with the protecting zener diode. | Download Scientific Diagram
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What is the purpose of the Zener diode in this relay coil circuit? - Electrical Engineering Stack Exchange
