Capacitor replacement principle

Among the commonly used electronic components, capacitors are the most complex types of components and specifications, especially in order to meet the requirements of different circuits and working environments. Even capacitors with the same capacitance value and rated voltage have many different types and materials. The choice of traits.

1. Replacement principle of ceramic chip capacitor

When replacing ceramic capacitors, replace them with capacitors of the same type. If you cannot find the same type of ceramic capacitors, you should pay attention to the difference between the nominal capacity of the ceramic capacitors and the required capacitor capacity. The better, and the voltage value of the ceramic capacitor should meet the requirements of the replacement capacitor. The rated voltage of the selected ceramic capacitor should be 2.5 times the actual operating voltage.

2. The principle of substitution of electrolytic capacitors

When replacing the electrolytic capacitor, replace the capacitor of the same type as much as possible. If the electrolytic capacitor of the same type cannot be replaced, note that the capacitance and voltage value of the selected electrolytic capacitor are consistent with the original filter capacitor.

In addition to the above points, the replacement of electrolytic capacitors should also pay attention to the selection of high temperature resistant electrolytic capacitors. In some filter networks, the capacity of electrolytic capacitors is also very accurate, and the error should be less than ±0.3%-±0.5%. The capacitance in the frequency dividing circuit, S correction circuit, oscillation circuit and delay circuit should be as consistent as possible with the calculation requirements. Try to use high-humidity resistant electrolytic capacitors.

3. Variable capacitor replacement principle

When substituting the trimmer capacitor, replace it with the same type of capacitor as much as possible. If the capacitor of the same type cannot be replaced, it should be noted that the smaller the capacitor's nominal capacity value and the required capacitor capacity tolerance, the better. The voltage value of the trimmer capacitor should meet the requirements of the replacement capacitor.

At present, ceramic capacitors are widely used in various electronic products and are closely related to our lives. The quality of ceramic capacitors is directly related to our quality of life and safety. When choosing the ceramic capacitor, please choose the original authentic product, the quality is guaranteed and can be used safely.