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Test Methods



1. Square Wave Current Screening Test

The shock current waveform is 2ms square waves, and the time interval between the 2m wave shock is 30s ~ 60s.

The purpose of the square wave current screening test is to remove bad products in MOV products.


2. Residual Pressure Test

2.1 Named Lightning Intellectual Pressure Test

The current waveform is 8/20 μs standard lightning waves. The current waveform and amplitude deviation shall comply with the provisions of Article 8.3.2 of GB11032 and GB/T16927.1.


2.2 Operation Impact Current Under The Residual Pressure Test

The operating wave of the current waveform is 30/60 μs. The current waveform and amplitude deviation shall comply with the provisions of Article 8.3.3 of GB11032 and GB/T16927.1.


3. Large Current Impact Tolerance Test

The current waveform is 4/10 μs, and the current waveform and amplitude deviation shall comply with the provisions of GB11032 8.5, GB/T 16927.1. The MOV test products extracted by this test shall not be used according to normal products after the test.


4. Accelerate Aging Test

The test method is performed by the provisions of GB11032 8.6.2, and 3 pieces of resistance tablets are randomly selected every quarter. During the test process, the voltage change is not greater than ± 1%, the test temperature is 115 ° C, and the time is 1000H. To effectively monitor the aging performance of all specifications of resistance tablets, the resistance of various specifications must be raised at least once a year to accelerate the aging test.

The MOV test products extracted by this test shall not be used according to normal products after the test.


As a trusted and experienced metal oxide varistor manufacturer, we recognize the critical role that MOVs play in protecting electronic systems from voltage surges. By thoroughly understanding the testing methods for MOV varistors, including MOV blocks and their cores, you can ensure the reliability and performance of these essential components. From inspecting for damage to conducting accurate resistance tests, our comprehensive guide provides valuable insights to successfully test MOV varistors. By following these recommended procedures, you can enhance the longevity of your electronic systems and prevent potential damages. Trust in our expertise and make use of our comprehensive testing methods to guarantee the optimal performance of your MOV varistors and safeguard your valuable electronic devices.



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Do you have any questions regarding MOV blocks or MOV disks?
Do you have any questions regarding MOV blocks or MOV disks?

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