1. Determine the required voltage rating.
First, the maximum steady-state operating voltage of the circuit must be determined. Care must be taken to use the upper tolerance limit of the voltage source, e.g., for a 220VAC line,a 10% high line condition should be assumed, resulting in 242 Volts. Once the level is determined, refer to the column in the data table headed "Maximum Continuous Voltage" and select a group having the nearest greater value to this level.
MOV(Metal Oxide Varistor) product portfolio offers 7, 10, 14 and 20 mm radial leaded varistor devices which protect against overvoltage transients such as lightning, power contact and power induction. The metal oxide varistors offer a choice of varistor voltages from 18 V to 1800 V and Vrms voltages from 11 V to 1100 V. The devices have high current handling, high energy absorption capability and fast response times to protect against transient faults up to rated limits.
induction. The metal oxide varistors offer a choice of varistor voltages from
18 V to 820 V and Vrms voltages from 11 V to 510 V.
The devices have a high current handling, high energy absorption capability
and fast response times to protect against transient faults up to rated limits.(Metal Oxide Varistor)
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