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Eight Principles of Capacitor Replacement, Have You Collected It?

Source: FAQ Editor: PingShang Click: Release time: 2021-09-14 08:51:34

   The chip capacitor is broken. The general solution is to find a new capacitor of the same specification to replace it. But what if you can't find a new capacitor of the same specification, in fact, you can use the substitution method to solve this problem. However, it needs to be carried out in compliance with the following principles:

1. Ceramic capacitors and paper capacitors

If ceramic capacitors and paper capacitors are to be replaced with each other, they must be carried out under the same capacity and withstand voltage, and the volume is not limited.

2. Mica capacitors replace metallized paper capacitors

If we use mica capacitors instead of metallized paper capacitors, it must be done without limiting the volume, withstand voltage and capacitance. In addition, we also need to consider the replacement cost, including the price.

3. Metallized paper capacitors replace mica capacitors

When using metallized paper capacitors instead of mica capacitors, the premise must be that the operating frequency and insulation resistance are not high, and the capacitors must be at the same withstand voltage and capacity.

4. Replacement between capacitors of the same capacity

If there are no restrictions, capacitors with the same capacity and high withstand voltage can replace capacitors with low withstand voltage, and capacitors with small errors can replace capacitors with large errors.

5. Metallized paper capacitors replace glass glaze capacitors

Without considering the influence of frequency, metallized paper capacitors with the same capacity and withstand voltage can replace glass glaze capacitors.

6. Non-sealed capacitors replace sealed capacitors

The replacement of sealed capacitors with non-sealed capacitors with the same capacity and withstand voltage must be done when the requirements for moisture resistance are not high. Otherwise, the capacitor will be exposed to moisture due to poor sealing, resulting in poor performance of the capacitor.

7. Use in series connection

Connecting two or more large capacitors with different capacities and different withstand voltages in series can replace the small capacitors; the withstand voltage of the capacitors after series connection should take into account that the voltage drop on each capacitor should be within the allowable range of its withstand voltage.

8. Use in parallel connection

Connecting two or more small capacitors with different withstand voltages and different capacities in parallel can replace a large capacitor. The withstand voltage after parallel connection is subject to the withstand voltage value of the smallest withstand voltage capacitor.

The eight major principles of capacitor replacement are introduced here. I believe that the problem of capacitor replacement is not difficult for everyone. If you need to find the specific material number of the capacitor, you can click on the following link to go to: https://electronic7.com/product/