What is the nominal discharge current (In) indicative of?

The nominal discharge current (In) is indicative of the peak value for which the Surge Protective Device (SPD) remains functional after experiencing electrical surges. This value represents the maximum transient current that the SPD can handle without degrading its performance or sustaining damage. It is a critical specification for ensuring that the SPD can effectively protect electrical equipment from voltage spikes that result from lightning strikes or other electrical disturbances. Understanding this parameter helps in selecting the right SPD for a given application, ensuring it can withstand expected surge levels while maintaining operational integrity. This aspect of the SPD is essential for ensuring long-term reliability in protecting sensitive electronic devices.