C878ZG35400AA2J

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Film capacitors are a type of capacitor consisting of a thin film of plastic material that has been coated with metal electrodes. They are known for their relative stability, high insulation resistance and dielectric constant, and low temperature coefficient. The C878ZG35400AA2J is a film capacitor that is commonly used for switching power supplies, snubbers, and decoupling circuits in a wide range of applications.

Working Principle

Film capacitors operate on the principle of storing electrical energy in the form of electric fields between two or more layers of insulating material. The C878ZG35400AA2J capacitor has two terminal pins connected to a thin sheet of metal-coated plastic. Inside the capacitor, the electric fields are created by the flow of electric current between the metal electrodes. The electric fields are strongest near the metal-coated surface and weakest at the center.

When a voltage is applied across the terminals of the capacitor, the electric field created by charge separation produces an electric field around the metal electrodes, which opposes the applied voltage. This opposition causes the capacitor to store a certain amount of electrical energy, referred to as the capacitance.

Application Fields

The C878ZG35400AA2J is commonly used in many applications such as switching power supplies, snubbers, and decoupling circuits. It is also ideal for high frequency applications because it has a low ESR (equivalent series resistance) and high insulation resistance.

In switching power supplies, this capacitor is often used to regulate the output voltage by quickly charging and discharging with the help of an integrated circuit, which controls the timing of the charge and discharge processes. The capacitor also helps to reduce the noise and reduce electromagnetic interference in the high frequency application.

In snubbers circuits, this capacitor is used in conjunction with other components to reduce the voltage stress on the devices and reduce the voltage overshoot and ringing. The capacitor stores energy during the peak of the voltage cycle and releases it back during the trough, thereby smoothening the voltage cycle and improving the performance of the device.

In decoupling circuits, the capacitor is used to stabilize the power supplies, reduce the switch times, reduce the voltage peaks and overshoots, reduce EMI, reduce power supply noise, and improve the efficiency of power supplies.

Overall, the C878ZG35400AA2J is a very useful capacitor for a wide range of applications because of its small size, high capacitance, high insulation resistance, and low ESR.

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