Is the CBB capacitor polarity?

CBB capacitor structure: A non-polarity polypropylene film made of a negative temperature coefficient of non-polar capacitors. There are two types, unsealed (usually colored resin resin packages) and hermetic (encapsulated with metal or plastic cases).

Polarity means that there are positive and negative points. Non-polarity is naturally a capacitor with no positive and negative polarities. Because of the importance of positive and negative electrodes, it is necessary to know how to identify the positive and negative electrodes of different capacitors, otherwise it will cause reverse connection and even cause an explosion. The CBB capacitor is a nonpolar capacitor and it does not divide the positive and negative terminals.

CBB capacitor is also called polypropylene film capacitor.

The working principle and characteristics of CBB capacitor, high insulation resistance, excellent frequency characteristics (wide frequency response), and medium loss is very small. Based on the above advantages, thin-film capacitors are used in large numbers in analog circuits. Especially in the signal cross-connected part, a capacitor with good frequency characteristics and very low dielectric loss must be used to ensure that no distortion occurs when the signal is transmitted. High dielectric constant, small size, large capacity, good stability, suitable for bypass capacitors. Polystyrene film capacitors, small dielectric loss, high insulation resistance, but large temperature coefficient, can be used for high-frequency circuits.

The metal coating of the CBB metallized film is deposited on the film by vacuum evaporation. The thickness is only several tens of nanometers. When there are defects and impurities on the medium, partial electric breakdown may occur, and the electric breakdown may occur. The energy generated by the arc discharge vaporizes the metal plating adjacent to the point of electrical breakdown. The breakdown point is separated from the surrounding plates, and the electrical performance of the capacitor can be restored to normal.