How to Read MOV TOV Data: Temporary Withstand Is Not MCOV
If a datasheet states 1.25 per unit for 1 second, the duration and voltage reference are part of the rating. ...
Tag: MOV
How Should the Third Lead of a Thermally Protected MOV Be Wired?
The third lead on a thermally protected metal oxide varistor (MOV) often invites the wrong first question. Designers ask whether ...
Why Do MOV Leads and PCB Traces Increase Residual Voltage?
Why can the voltage at a protected circuit exceed the metal oxide varistor (MOV) clamping voltage in the datasheet? The ...
Can an MOV AC MCOV Be Calculated Directly From Its DC Rating?
No. Dividing a metal oxide varistor's maximum DC operating voltage by √2 does not create an allowable AC rating. The ...
How Should MOV Leakage Current Be Read From a Datasheet?
A leakage-current figure in an MOV datasheet is easy to misuse. A few microamperes can look like a fixed property ...
Why an MOV Joule Rating Cannot Be Compared Without the Waveform
Two MOVs carry the same joule rating. Does that mean they can absorb the same surge and be exchanged directly? ...
Can a Fuse Replace an MOV Thermal Disconnect?
If an AC input already has a fuse, does the MOV still need a thermal disconnect? The fuse does not ...
How Should MOV Temperature Derating Be Applied?
Learn how to apply MOV temperature derating to operating voltage, surge current, energy and average power without misreading the operating ...
Can an MOV Single-Pulse Surge Rating Be Used for Repetitive Pulses?
Learn why an MOV single-pulse surge rating is not a repetitive-duty guarantee and how to read pulse-count, waveform, interval, and ...
Why MOV MCOV Must Be Selected Above the Actual Operating Voltage
Learn how to select MOV maximum continuous operating voltage using high-line tolerance, connection point, waveform peaks, and clamping requirements.
