CMR04E680JPDM

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Mica and Polytetrafluoroethylene (PTFE) capacitors are used in a variety of applications, from Avionics and Aerospace to radio frequency and microwave applications. CMR04E680JPDM is one such component and its applications and working principle are explained in this article.

The CMR04E680JPDM is a method of manufacturing a low parasitics, high-stability, and low-loss microwave mica capacitor. It has a C0G temperature coefficient of capacitance (TCC) which is highly suitable for use in high-frequency applications due to its higher frequency and lower resonance. It has a robust construction and can handle a range from -55°C to +125°C. Its dielectric layer is made from a mixture of mica and polytetrafluoroethylene (PTFE). This composition gives it excellent RF and high-frequency attributes, but it does reduce its working temperature by a few degrees.

The CMR04E680JPDM is suitable for different applications such as for directional couplers, filters, and high-frequency module components. It is also used in high-quality audio and telecommunications systems. Its electrical properties include a capacitance of 68 pF, a DC reacting force of 0.04 Ω and an inductance of a fraction of one nanhenry. The CMR04E680JPDM gives good performance with a range of high-frequency material including attenuators and amplifiers.

The working principle of the CMR04E680JPDM depends on the principle of storing electrical energy as a product of charge and capacitance. This storage can be in two ways, either in parallel or in series. When a capacitor is connected in parallel, it stores charge via the dielectric, while when connected in series, the electrical charge is stored through the physical contact of the conducting plates. The mica and PTFE material used in the construction of the capacitor reduces the losses due to dielectric and damping effects. This gives the device a higher performance, with better insulation, lower voltage drops and a higher tolerance to interferences.

The CMR04E680JPDM also works on the principle of Electrochemical couples. This involves a flow of charges between two plates of opposite charge, creating a potential difference in the mediums. This potential difference is then used to store energy. This in turn gives the capacitor a low ESR, permitting higher frequency response. It also improves the quality of the signal passing through the capacitor.

In conclusion, the CMR04E680JPDM makes a very good component for use in a wide range of high-frequency applications. Its low parasitics and low losses make it ideal for use in filters, directional couplers and high-frequency modules. Its electrochemical couples provide excellent insulation and better signal quality. Its TCC of C0G means it can be used even in the toughest of environment.

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