METAL OXIDE VARISTOR MOV - 5mm Disc
RoHS
ü
HOW TO SELECT METAL OXIDE VARISTORS
• What is the range of ACrms or DC Vol...
METAL OXIDE VARISTOR MOV - 5mm Disc
RoHS
ü
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. Check to make sure the withstanding surge current of the varistor is sufficient.
P Type Y Type (most popular)
Check whether the maximum energy and surge life of the varistor is enough.
Check the relation:
Maximum withstanding voltage of the protected device > Maximum clamping voltage of the varistor > The real clamping
voltage occurred > Breakdown voltage of the varistor >Operating voltage of the protected device.
5 f JVR VARSITOR
Part
Maximum
Varistor Maximum Withstanding Rated Energy UL CSA VDE
Number
Allowable Voltage
Voltage
Clamping
[email protected] Voltage
Surge Current
Wattage 10/1000 ms
ACrms DC
Tolerance V@ 5A 1Time 2 Times
(V) (V) (V) Range
(V)
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