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| Created: 07/27/2004 |
Product: Ceramic |
| Updated: 08/19/2008 |
Category: Leakage
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How can I calculate DC leakage limits for your military ceramic products? |
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Description :
How can I calculate DC leakage limits for your military ceramic products?
Answer :
Ceramic capacitors have extremely low DC leakage (DCL), so insulation resistance (IR) is usually specified instead. If DCL must be determined, it is first necessary to calculate the IR. Do this by considering the IR limits in the catalog. For instance, the IR limit for many BX capacitors is 1000 megohm-microfarads, or 100K megohms, whichever is less. For a 0.1 uF capacitor, the IR limit would be 1000/0.1, or 10,000 megohms. To get DCL, we would divide the circuit voltage (say 10 volts) by the IR limit of 10,000 megohms to get 1/1000 microamp, or 1 nanoampere, a very small level of DCL.
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