684MKP275KE

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Film capacitors are electrical components that use a film as a dielectric between two conductive plates. This type of capacitor is well-suited for high-frequency applications because of its low inductance and low dielectric losses. The 684MKP275KE is a film capacitor developed by Knowles Capacitors that is designed to meet demanding requirements in industrial, military, and medical applications. In this article, we will discuss the application field and working principle of the 684MKP275KE film capacitor.

Application Field:

The 684MKP275KE film capacitor is ideal for use in bypass and blocking applications due to its high current and voltage ratings. It also has an operating temperature range of -40°C to +105°C and its insulation resistance is tested to 100 Gohm. These features make it an ideal choice for use in high-temperature, high-power-density power supplies, industrial power inverters, and switching power supplies.

The capacitor is also well-suited for use in a variety of medical applications, such as pulse oximetry, pulse wave detectors, and EEG amplifiers. Its high-temperature operation and ultra-low ESR make it an ideal choice for these demanding applications.

In addition, the 684MKP275KE film capacitor is frequently used in military and aerospace applications. These applications include avionics systems, thermal cycling systems, missile electronics, and fire control systems.

Working Principle:

The 684MKP275KE film capacitor is constructed of a polyester film that is coated with an aluminum foil. The aluminum foil is sandwiched between two pieces of polypropylene film, with polyester film on the top and bottom layers. This construction results in a dielectric that has excellent high-temperature stability, low ESR, and a high insulation resistance.

The way a film capacitor works is relatively simple. When a voltage is applied across the terminals of the capacitor, an electric field is created, which causes the plates of the capacitor to become polarized. This electric field creates an attractive force between the two plates, and this force creates a storage of energy.

When the voltage across the capacitor increases, the attractive force between the two plates also increases. This increases the amount of energy stored in the capacitor, and this stored energy is released back into the circuit when the voltage decreases. This process is repeated, and over time the capacitor accumulates enough energy to be released back into the circuit.

The 684MKP275KE film capacitor is designed to provide accurate and reliable performance in demanding applications. Its construction and design make it an ideal choice for industrial, military, and medical applications.

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