B32522C0225K189

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Film Capacitors

Film capacitors are electrical components used in a wide variety of applications, from high-voltage power transmission and power supplies to automotive and consumer electronics. Film capacitors are composed of two metal plates (or blade), separated by a thin dielectric material, such as polyester, polystyrene, polypropylene, and polycarbonate, making them ideal for low-level signals. These capacitors are typically rated for AC applications, but are also used in DC circuits, as well as in signal filtering applications.

B32522C0225K189 Application Field and Working Principle

The B32522C0225K189 is a film capacitor from EPCOS series recommended for applications such as SMPS, frequency anti-interference, and EMI suppression. This capacitor has two leads and is built with polypropylene film, making it compatible with a range of AC and DC applications. It has a rating of 250V and features a self-healing property, allowing it to withstand high transient voltages. The device is rated to be used in temperatures up to +125°C.

Film capacitors work by storing electrical energy when a voltage is applied across opposite plates. This stored energy creates a static field that attracts the opposite charge. To reduce the electric field between the plates, a dielectric insulator is used to separate them, as this reduces the strength of the field proportional to the thickness of the insulator. Therefore, using a thinner dielectric allows the capacitor to store more energy; however, the thinner insulation material must also be able to hold the voltage.

In the B32522C0225K189, the metal plates are separated by a thin polypropylene film, which is ideal for low-level signals. As a capacitor stores electrical charge, the device\'s capacitance is effectively proportional to the area of the plates and inversely proportional to the distance between the plates. As the charge builds up, a voltage eventually causes current to flow, allowing the capacitor to discharge its charge.

In conclusion, the B32522C0225K189 is a film capacitor from EPCOS series, suitable for applications such as high-voltage power transmission, power supplies, and EMI suppression. Featuring two leads, polypropylene film, self-healing properties, and a temperature rating of +125°C, this device stores electrical energy in a static field between two plates, a process regulated by the thickness of the dielectric insulator.

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