CD42FD473KP3

The CD42FD473KP3 is a type of Mica and PTFE Capacitors. It is commonly used in circuitry applications in which a low-loss dielectric is desired which can typically operate up to a few hundred megahertz frequency range. With its numerous common applications in RF circuits, capacitors of this type are typically used in TV and radio tuners, cable modems, video streaming devices, and other telecommunications equipment.

These capacitors are constructed of a combination of mica and PTFE (polytetrafluoroethylene) and generally have a very low dielectric loss. The PTFE acts as an insulation, while the mica is used in the form of a thin-film dielectric. The low loss of the mica and PTFE combination makes it ideal in RF applications, as it allows higher frequencies to be used without introducing too much loss. The combination also offers a large capacitance range over a wide frequency span.

The capacitors are usually produced from either cut or machined mica sheets. A variety of mica grades are available based on the electrical properties required in the application circuit. The PTFE is applied over the mica sheet, forming a dielectric layer. The thickness of the PTFE dielectric layer also varies depending on the intended application. For higher capacitances, thicker PTFE dielectric layers are used. For higher voltages, thicker PTFE layers are also used.

The capacitor works through the principles of electrostatic attraction. The positive and negative terminals of the capacitor are configured such that opposite charges attract each other, creating an electric field between the terminals. The electric field generates a ‘capacitive’ effect, which enables the capacitor to store energy in the form of an electric field. When a voltage is applied across the terminals of the capacitor, electric charge accumulates in the electric field, resulting in the storage of electrical energy.

The CD42FD473KP3 capacitor is a relatively low-cost type of mica and PTFE capacitors and is mainly used as an RF capacitor in applications such as TV and radio tuners, cable modems, streaming devices, and other telecom equipment. Due to its wide voltage range, the capacitor can be used in various other applications as well. The mica and PTFE dielectric materials combined with the electrostatic attraction principle enables it to provide a reliable, low-loss capacitance with a high tolerance to voltage.