What is the maximum discharge current through an SPD with an 8/20 µs waveform called?

The term for the maximum discharge current through a surge protective device (SPD) characterized by an 8/20 µs waveform is referred to as the maximum discharge current. This specification defines the highest current value that the SPD can safely manage during a surge event, such as lightning strikes or power transients.

In the context of lightning protection, the 8/20 µs waveform represents the standard time parameters for transient voltage surge tests, where the first peak of the current rises in approximately 8 microseconds and then decays over 20 microseconds. Understanding this parameter is crucial for ensuring that the SPD will operate effectively within these limits and provide adequate protection for electrical systems.

By focusing on the capacity of the SPD to handle this maximum discharge current, one can gauge the reliability and effectiveness of the protective measures in place against electrical surges. This understanding is essential in the design and implementation of lightning protection systems to ensure they can withstand expected surge events.