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Surge Protective Devices (SPD) is a critical safety component that protects valuable electronics from transient overvoltages by diverting damaging surge currents. SPDs sustain irreversible accumulated weariness under each surge event and has a finite operational lifespan. It is anticipated that all SPD devices will age as a result of their function (as shown in Figure 1). Consequently, it is normal for an SPD to reach the end-of-life and require module change. International standards such

Ethernet and PoE networks are vulnerable to surges from lightning, switching transients, and ground loops. A single event can destroy cameras, switches, and PLCs simultaneously. This guide covers why protection is necessary, how industrial Ethernet SPDs work, and how to select the right device for your installation. What is Ethernet and PoE surge protection? From an electrical engineering standpoint, Ethernet surge protection is the advanced practice of intercepting and safely diverting