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What are the main characteristics of chip capacitors?

Source: FAQ Editor: PingShang Click: Release time: 2021-10-22 09:03:58

The main parameter characteristics of the chip capacitor are as follows:

1. Capacity/error: the maximum allowable deviation range between the actual capacity and the nominal capacity. Generally divided into 3 levels: I level ± 5%, II level ± 10%, III level ± 20%.

The allowable error of precision capacitors is small, while the error of electrolytic capacitors is large, and they use different error levels.

Expressed by letters: D—005—±0.5%; F—01—±1%; G—02—±2%; J—I—±5%; K—II—±10%; M —Class III—±20%.

2. Rated working voltage: The chip capacitor can work stably and reliably for a long time in the circuit. The maximum DC voltage it bears is also called withstand voltage. For products with the same structure, medium, and capacity, the higher the pressure resistance, the larger the volume.

3. Temperature coefficient: In a certain temperature range, the relative change value of capacitance for every 1°C temperature change.


4. Insulation resistance: It is used to indicate the magnitude of leakage. Usually, the insulation resistance of small-capacity capacitors is very large, ranging from several hundred megaohms to several gigaohms. The insulation resistance of electrolytic capacitors is generally small. Relatively speaking, the larger the insulation resistance, the better, and the leakage is also small.

5. Loss: under the action of electric field, the energy consumed by the capacitor in a unit of time by heating. These losses mainly come from dielectric loss and metal loss, and are usually expressed by the loss tangent value.

6. Frequency characteristics: The electrical parameters of the patch capacitor change with the frequency of the electric field. For capacitors that work under high frequency conditions, since the dielectric constant is lower at high frequencies than at low frequencies, the capacitance is also reduced accordingly.