Shenmao Capacitors specialized in aluminum electrolytic capacitors from 1970

Insulation resistance of axial film capacitors|Focus on mid-to-high-end brand capacitor manufacturers

by:Shenmao     2021-04-12
The axial film capacitor has the advantages of non-polarity, high insulation resistance, excellent frequency characteristics (wide frequency adaptation range) and small dielectric loss. It is a very good capacitor. Before we talked about the non-polarity of axial film capacitors, today we talk about the insulation resistance of axial film capacitors. The so-called axial film capacitor insulation resistance refers to the ratio of the voltage applied to both ends of the capacitor to the leakage current, that is, Ru003dU/IL. R refers to the insulation resistance, U refers to the voltage, and IL refers to the leakage current of the axial film capacitor. Speaking of this, many people may not know what the leakage current of the axial film capacitor is, then let's talk about it. Only by clarifying these theories can we understand it well. When the leakage current of the so-called axial film capacitor is applied to the two ends of the axial film capacitor with a rated DC working voltage, it will be observed that the charging current for charging the capacitor begins to change greatly, and it decreases with time, and reaches a certain value A relatively stable state is reached, and the magnitude of the current at this value is called leakage current. For more details, please call the toll-free hotline: 4006299138. Therefore, the capacitance of the axial film capacitor is Cu003dQ/U, Q is the charged amount, and U is the voltage applied across the capacitor. Based on the above formula, Ru003dQ/(C*IL) can be obtained. From this, it can be known that the larger the capacitance of the axial film capacitor, the smaller the insulation resistance, and vice versa, the larger the insulation resistance.
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