Analysis of the capacity error of safety capacitors

Whenever a customer consults us, we will definitely ask if the capacity is bigger, the capacity error value is such a problem. The role of capacity and capacity error in the capacitor is very important. Therefore, edit me to everyone or Let's talk about the capacity error of the safety capacitor.

Capacitance refers to the amount of charge stored at a given potential difference, denoted as C, and the international unit is Farad (F). The capacity of the capacitor is determined by the impedance exhibited when measuring the AC capacity. Generally, the AC capacity varies with frequency, voltage, temperature, and measurement methods, but capacitors of different specifications vary in degree. However, some customers require that the capacitance of the safety capacitor is particularly accurate and the temperature characteristics are particularly stable. Therefore, it is also possible to manufacture a capacitor that is very affected by frequency, voltage, and temperature. But don't worry too much. In addition to ceramic capacitors with high dielectric constant, the capacitance of general safety capacitors varies with the application conditions below the tolerance of the capacitance.

Then why is there an "error" in the capacity of the safety capacitor? Because in the current technology, it is impossible to ensure that the capacitance of each capacitor is completely consistent with the design value (nominal value) during the manufacturing process, and there is always a certain deviation, that is, the tolerance of the capacitor capacitance (error) ). The capacity error of the safety capacitor capacity is expressed in percentages of J grade: 5%, K: 10%, M: 20%.

There are also expressions commonly used for small-capacity ceramic capacitors: absolute error in the value of the capacitance, absolute error. In PF, ie: C stands for ±0.25PF and D stands for ±0.5PF.