BFC236845225

Film Capacitors

A film capacitor, or plastic film capacitor, is an electronic component made up of two conductive pieces separated by a dielectric Polyethylene Naphthalate (PEN) plastic film. Types of film capacitors include polyester, polypropylene, and paper/oil capacitors. The BFC236845225 model is a type of film capacitor. It is a type of axial capacitor with dimensions of 45mm x 25 mm.

The BFC236845225 model has an application field in various electrical products such as high-frequency filtering, decoupling, radio frequency applications, and load shaping. It is widely used in devices such as TVs, radios, GPS navigation systems, medical imaging equipment, telecommunications systems, and computers.

Working Principle

The working principle of a film capacitor is based on the concepts of capacitance and dielectricity. When a voltage is applied to the two leads of the capacitor, electricity will flow through it. However, an electrical charge is stored in the capacitor’s dielectric (insulating) material. This charge is stored in the form of an electric field between the two conductive materials. The voltage applied to the capacitor causes electric charges to flow and be stored in the dielectric material.

The energy storage capacity of a film capacitor is determined by its fabricated area, film thickness, and dielectric constant. The dielectric constant is a measure of how efficiently a material stores and releases electrical energy. The dielectric constant of PEN plastic film, which is a popular material used to construct film capacitors, is 4.4. This means that it can store and release energy very effectively, and can be used in unique applications such as power correction and smoothing.

In addition, film capacitors have a low equivalent series resistance (ESR), which allows them to respond quickly to changes in voltage without substantial power loss. Generally, the ESR of a film capacitor is also very low, which is around 0.01 Ω. This makes them suitable for high-frequency applications such as PFC (power factor correction) and snubbing.

The BFC236845225 model is a type of film capacitor that can store and release energy very effectively and quickly. It is widely used in various electrical applications, ranging from high-frequency filtering to power correction. Its high dielectric constant and low ESR make it ideal for use in high-frequency and power correction applications.