# Why is my measured leakage current of the capacitors much lower than my calculated value?

This is more a theoretical question.

I have a DC circuit with multiple capacitors with different voltages. Because I need to know how much current my circuit needs over a longer time, I calculated all the capacitor leakage currents which are around 0.8 uA. When measuring the current of my device while running, I only have around 0.3 uA. It was measured with a uA Multimeter in series with the DC source.

For the calculation of the capacitor Leakage currents, I used the given values in the datasheet at room temperature.

My question now is:

Why is my current so much lower than my calculated value when measuring the circuit? Are the values in the datasheet more suggestions or how am I to interpret the insulation resistance?

Unfortunately, I am not able to provide any schematics for this question.

• Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
– Community Bot
Oct 7, 2021 at 7:55
• I edited the post, i hope its more clear now Oct 7, 2021 at 8:30
• the leakage is usually a worst-case value, since the minimum is zero (ideal cap). Also they usually quote the maximum after some stress (temperature and/or time) Oct 18, 2021 at 6:52