Overvoltage-protection circuit saves the day - EDN
Reverse polarity protection and over voltage protection Short circuit... | Download Scientific Diagram
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Amazon.com: Voltage Monitoring Relay DC 12V/24V/48V Over Voltage and Under Voltage Protection Relay 35MM Guide Rail Voltage Protector Device(DC 24V) : Industrial & Scientific
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Designing a Simple Over-Voltage Protection Circuit using Zener Diodes