There are many types of capacitors, each with its unique design and working principles. Capacitors are generally divided into two types: polarity and non -polarity. For polar capacitors, it is critical to correctly identify and connect positive and negative poles, because the wrong connection may cause capacitor damage or even explosion. However, for non -polar capacitors, there is no need to worry about polar issues during installation. So, does porcelain capacitors have positive and negative poles, and how to distinguish their poles?
Porcelain capacitors belong to polar capacitors, which means that there is no need to distinguish positive and negative poles during installation. They can be installed at will without damage due to polarity problems. In contrast, traditional electrolytic capacitors are usually distinguished by the length of the pin. The long pins indicate the positive pole, and the shorter is the negative electrode. Patch -type 解 electrolytic capacitors can usually identify polarity through the color stripes of the appearance. On one side of the strap is the positive pole. Other types of non -polar capacitors, such as electrolytic capacitors, polyester capacitors, and variable or fine -tuning capacitors, and there are no positive and negative poles.

When the polarity of the capacitance needs to be determined, the multimeter is a useful tool. The medium between the poles of the capacitor is not completely insulated, and its resistance is limited, usually more than 1,000 mega Euros. This resistor is called insulation resistance or leakage resistance. For electrolytic capacitors, when its positive poles are connected to the positive electrode of the power supply (the black table pens under the resistance), the negative electrode is connected to the negative electrode (red table) of the power supply, and the leakage current is small (large missing resistance). Conversely, the leakage current increases (the leakage resistance is reduced). You can first assume that the extremely positive electrode is tested with the R*100 or R*1k gear of the multimeter, and then the electrode is used for the re -test. In two measured, the needle stays on one side with a large resistance (the needle is left), or the larger number of digital reading is the positive electrode.
In summary, porcelain capacitors are a type of non -polar capacitor. It is often used in applications such as signal source filtering, and its capacity is usually small. Because it belongs to an unlawful electrolytic capacitance, it is not necessary to consider the recognition of positive and negative poles during installation. It can be installed at will. This characteristic makes porcelain capacitors have high flexibility and use convenience in electronic circuit design.