METAL OXIDE VARISTOR MOV - 7mm Disc RoHS ΓΌ HOW TO SELECT METAL OXIDE VARISTORS What is the range of ACrms or DC Voltage in the application? How will the varistor be connected in the circuit? Calculate the required varistor voltage at 10% to 25% above the system RMS or DC Voltage.
Calculate the varistor energy rating needed based on energy in transient voltage.
Calculate the surge current wave form from the surge voltage and surge impedance
