BFC230352474

Film capacitors, also known as plastic film capacitors, plastic film dielectric capacitors or film dielectric capacitors, are composed of a metal film electrode and a dielectric film as the medium. The capacitance of the capacitor is determined by the area of the electrode and the dielectric constant of the dielectric. BFC230352474 is a type of film capacitors, which usually used for energy storage, filtering or AC-coupling applications. Here we give a brief introduction about its application field and working principle.

The application fields of BFC230352474 include motor drive, DC power supply, frequency conversion, UPS, charging and discharging, power factor compensation, and other power grid frequency conversion systems. This type of capacitor is dedicatedly designed for large current interference noise, high-temperature resistant, high reliability, with wide temperature range and long life. With such features, it can tolerate current up to 5A and temperature between -55℃ and 110℃.

The devices are constructed from physically and electrically robust film forms. The dielectric layer between the electrodes is made up of special plastic film, metal film connected with tin-plated lines，and aluminum-polypropylene film. Tin-plated lead wires, welded directly to metal film, provide electrical connection to the capacitor. Various other construction varieties are available according to customer requirement, such as this type of capacitors can be combined to produce tandem elements. The plastic case provides the capacitor with superior characteristics, such as flame retardant rating and humidity resistance.

Film capacitors are most effective when operated in an a.c. circuit though they may also be used in d.c. circuits. In d.c. circuit, film capacitors normally acts as a filter. In a.c. circuits, film capacitors provides an uninterrupted path to the alternating current while blocking the flow of direct current. This function is ideal for coupling high and low voltage signals.

The working principle of film capacitor is based on its structure. The device has an insulated metal layer, separated by an insulating layer (dielectric) from a metal electrode. When the alternating voltage is applied, a series of points of the metal layer will become negative and then positive. A small region of the dielectric layer in between them will charged with opposite sign. This causes a strong electric field between the metal layer and the metal electrodes. This electric field inducts the current and creates capacitance.

To sum up, BFC230352474 have many advantages such as high temperature tolerance, high electrical breakdown, high reliability, long life, etc. It can be widely used in power electronics applications with different voltages and frequencies, such as motor drive, DC power supply, frequency conversion, UPS, charging and discharging, and power factor compensation. This type of capacitor is also suitable in frequency conversion systems for power grid.