B25620B1406K981

Film capacitors are electrical components that store energy in an electric field and then discharge it to the outside circuit. They are generally formed by taking layers of a dielectric material and using electrical energy to create an electric field between the layers. They have many applications in the electronics world, including radio frequency (RF) circuits, power factor correction, heaters, motors, and lighting. The B25620B1406K981 is a specific type of film capacitor that is used to provide voltage blocking and decoupling for DC applications.

Construction and Basic Properties

The B25620B1406K981 is constructed from two sheets of polypropylene film, each separated by an aluminum anodized oxide layer, which acts as its dielectric. The capacitance of the capacitor is determined by the size of the dielectric layer and the distance between the two sheets of film. The B25620B1406K981 has a rated voltage of 250 volts and a capacitance range of 1.2-1.8nF. It has a rated frequency of up to 400 kHz and a temperature stability of -20 °C to 80 °C. It also features high self-healing capability, high temperature resistance, and a low dissipation factor of 0.025 at 100 kHz.

Application Field and Working Principle

The B25620B1406K981 is largely used in instrumentation and AC power line noise suppression due to its low dissipation factor. It can also be used in motor starter circuits and power supplies. Its high temperature resistance and self-healing properties make it a suitable choice for use in high temperature, low dissipation environments. B25620B1406K981 capacitors work on the principle of electrostatic storage of electric charge on two plates of different potentials.

When a potential difference is applied at the two plates of the capacitor, the plates are charged with an equal but opposite charge. The capacitance of the capacitor is then determined by the size and distance between the plates. When this potential difference is removed the capacitor will discharge the stored charge to the external circuit.

Conclusion

The B25620B1406K981 is a polypropylene film capacitor designed for DC blocking and decoupling applications. Its low dissipation factor and high temperature resistance make it suitable for use in instrumentation and AC power line noise suppression. The capacitor works on the principle of electrostatic storage of electric charge on two plates of different potentials, and when the applied potential difference is removed the capacitor discharges the stored charge to the external circuit.