Disc Ceramic

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Frequently Asked Questions...

IR (Insulation resistance)?

When I measure the IR of a capacitor with IR meter. First I need to charge the capacitor, normally with its rated voltage, charge the capacitor for a certain time. When I use higher charging voltage, the IR measured is also getting higher. Why?

Best Answer...


I'm not sure an IR meter is the optimal way for testing capacitors? But, if you do this, I would suggest that the capacitor only be tested at its rated voltage. And, a meaningful measurement may only be obtained if you use a known good reference capacitor for comparison.
I expect, measurement values will vary between capacitor types, i.e. disc, ceramic, vs. electrolytic, tantalum, etc. So, I expect a good known reference is needed to make a valid assessment.