Film Capacitors

MKP385513025JII2B0 Application Field and Working Principle

Film capacitors, also known as plastic capacitors, are self-healing capacitors with dielectric film as main insulation material and metal as electrode. Commonly used film materials include polypropylene, polyester, polystyrene and polyphenylene sulphide. This type of capacitor has the advantages of small size, low loss, low dissipation factor, high insulation resistance, wide working temperature range (-55℃~+125℃), etc., and is widely used in the filtering and coupling of dc-dc converters, general-purpose filter circuits, and other electronic equipment fields.

MKP385513025JII2B0 is a polypropylene film capacitor, which is widely used as an AC filter capacitor in various electronic circuits. It is mainly used in ac/dc power circuits, TV receivers, audio equipment, electronic controlling circuits, switching power supplies and so on. Compared with normal electrolytic capacitors, the capacitance is relatively stable and the voltage is relatively high, and it also has low ESR, high current through capability, low insulation resistance and low leakage current. In terms of capacitance, MKP385513025JII2B0 has a capacitance value of 0.0047uf, and the voltage range is 350V, which is perfectly suitable for AC filters.

MKP385513025JII2B0 also has some other characteristics in addition to its wide operating temperature range. Its design is based on the principle of the electric double layer capacitor. Its working principle can be understood as two semi-permeable films with different polarities on their surfaces, or two dielectric mediums with different dipoles. When the external voltage is applied, the dipole in the film reorganizes in order to adjust to the local electric field, which results in a negative charge separation on one side of the dipole. The attraction between the negative charge and the positive charge produces an electric double layer capacitor.

Therefore, in short, MKP385513025JII2B0 is a polypropylene film capacitor with a capacitance of 0.0047uf and a voltage range of 350V, designed based on the principle of the electric double layer capacitor. It is mainly used in ac/dc power circuits, TV receivers, audio equipment, electronic controlling circuits, and switching power supplies. Its advantages include low ESR, high current through capability, low insulation resistance and low leakage current.