The table in this slide describes the electrical parameters of a typical MOV. The first parameter is the Continuous Voltage Rating, either VAC or VDC, which must never be exceeded or the device will overheat and be destroyed. The next is the Energy, in Joules. This is the maximum amount of energy the MOV can dissipate during an event. The number shown in this table is the absolute maximum level that can be applied in a given time window. The MOV can only react to this high level one time. Similarly, the Peak Current, in Amps, is the maximum current that can pass through the MOV in a given time window. This also can only be applied once, requiring the MOV to be replaced. The Varistor Voltage is the voltage measured across the MOV when there is a small 1mA DC test current applied. Normal tolerance for the voltage spread is ±10% from a nominal voltage, but in this table the minimum/maximum levels a user can expect to see is shown. Shown in the fifth column, Clamp Voltage is measured across the MOV when there is a large current applied. Because of the enormous power being dissipated (340V x 100A = 34,000W), the high current is only applied for 20µS. Finally, the typical Capacitance is an inherent electrical property of a given size of MOV. High capacitance on an AC line is normally a benefit, but on a low voltage data line it can be a detriment.