Capacitor self-discharge rates

[Futterama]

Hi,

I would like to know how fast a certain capacitor self-discharges - or how much the voltage will decrease after a certain amount of time.

Specifically I would like to know if a MKT/MKP capacitor will loose a significant amount of charge in 62ms when charged to 600V. The capacitor is a MKT or MKP type, rated 470nF and either 630V or 1000V. I guess if the capacitor is rated 630V it will discharge faster than one rated 1000V.

One capacitor example could be this:

VISHAY ROEDERSTEIN|MKP1840447104M|CAPACITOR, MKP, 470NF, 1000V, | Farnell Danmark

I don't need an advanced calculation, but rather a "Yes, the capacitor will loose significant charge over 62ms" or the opposite.

I guess "significant" for me is more than 5-10% of the voltage.

Thanks.

 

[tcmtech]

No it wont loose any charge over 62 MS.
I have similar ones that I have gotten shocked off of weeks after I charged them up.

 

[JimB]

In the Farnell catalogue, the PDF Technical Datasheet gives the insulation resistance as greater than 100,000 Meg Ohm.
So I think the quick answer to your question is "No, the capacitor will not lose significant charge over 63mS"

JimB

 

[Futterama]

Thanks for your answers, this is great news to me, then my project is 1 step closer to success!

 

[schmitt trigger]

Just remember that BOARD LEAKAGE can be significantly higher than the capacitor's self leakage.

Leftover fluxes are the worst offenders, clean your board thoroughly after soldering. Even no-clean fluxes present leakage at higher temperatures and/or humidities.

 

[Sceadwian]

Not to mention the rest of the circuit.

 

[Futterama]

Thanks, I will remember that.