CM05CD120JO3

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Mica and PTFE capacitors vary in complexity, but generally have a few common components. The CM05CD120JO3 is a mica capacitor designed to provide a high dielectric constant at high frequency and temperatures. It is composed of a mica dielectric with foil electrodes that are covered with PTFE (Polytetrafluoroethylene) to provide a better capacitance range and insulation.

Functionality

The CM05CD120JO3 is designed to provide an effective solution for a variety of applications, including high frequency switching amplifiers, high speed digital circuits, and high temperature power conversion systems. This mica capacitor has a temperature range of -55°C to +150°C and a capacitance range of 0.22uF ~ 5.2uF for reliable operation. It offers minimal parasitic effects due to the low losses of the mica dielectric and excellent insulation property of PTFE coating.

Working Principle

Mica capacitors are formed when two metal plates are separated by a thin substrate, also known as a dielectric. The thin substrate is typically composed of mica minerals, as in the case of the CM05CD120JO3. The two metal electrodes cross over or touch the mica substrate, forming a small capacitance value between them. The dielectric mica insulator between the plates is designed to keep the electrons in place instead of allowing them to flow freely between them.

The mica dielectric is also able to effectively store the charge it is exposed to. When a voltage is applied over the two metal electrodes, they create a field that is conducted through the mica substrate. This causes electrical energy to be stored in the form of electric charge within the capacitor. Ultimately, this stored energy can be released and redirected back into the external circuit.

CM05CD120JO3 Structure

The construction of the CM05CD120JO3 starts with the use of two plates of metal. These are typically a nickel, copper or aluminum alloy, which are then rolled and cut into sheets. The two sheets are then striped and a thin layer of mica substrate is sandwiched between them. This sandwiched design offers unmatched reliability at extremely high temperatures because the mica substrate is able to withstand temperatures up to 350°C due to its low loss characteristics.

The mica substrate also features a polymer coating on the outer surfaces of the capacitor. This coating is typically composed of PTFE to further improve insulation and ensure high performance and low losses at high frequency and temperatures. The entire component is enclosed in an electrically insulated housing and connections are made through leads or straps.

Conclusion

The CM05CD120JO3 mica capacitor provides a reliable solution for a variety of applications, due to its high dielectric constant and excellent insulation property. Its composition is designed to offer minimal parasitic effects, a high temperature range and a wide capacitance range. This ensures that the CM05CD120JO3 is an incredibly dependable solution for applications requiring a high degree of reliability.

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