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The Application Field and Working Principle of B32654A1104K189

Introduction to Film Capacitors

A capacitor is an electronic component that stores energy in an electrical field. Capacitors are found in many different forms including electrolytic capacitors, ceramic capacitors, and mica capacitors. Film capacitors are a type of capacitor that uses a thin glass or plastic film as a dielectric. They are widely used in high-frequency power supplies, digital circuits, AC motor start circuits, and signal coupling and decoupling. Film capacitors are made from metallized films or plastic films that are wound together by various processes. The dielectric films used in the capacitor could in principle be formed into self-supporting films and wound into multiple coaxially wound layers, which significantly reduces the total volume of the capacitor.

The Application Field and Working Principle of B32654A1104K189

The B32654A1104K189 is a high-quality film capacitor from EPCOS. It has extended dielectrics to reduce losses, extremely low ESR, no polarity and low self-inductance.

The B32654A1104K189 is a polypropylene film capacitor that can operate over a wide temperature range of -55° to +125°C and withstand high surge currents and vibration. It is not only suitable for AC applications in high frequency networks, but also for DC and switching applications like decoupling, bypass, filtration, EMI compensation, snubber, as well as lighting and motor circuits. This capacitor is highly suitable for applications in plasma panel lit TVs, OLED displays, guitar amplifiers, as well as switch-mode power supplies and other high-density power supplies.

The capacitance of B32654A1104K189 is 1,104 pF, just four orders of magnitude higher than that of a ceramic capacitor of the same size. Its specific capacitance is approximately 3000 pF/V, which is four times higher than that of a ceramic capacitor of the same size. This makes it an ideal choice for high-speed digital applications where a broad frequency range is required.

At a rated voltage of 500V AC, the operating voltage range of the B32654A1104K189 is 100 to 400V AC (sine wave) and DC (direct current). It has an absolute capacitance tolerance of ± 5% and a rated voltage tolerance of 440 V, with a maximum dissipation factor of 0.4%.

The working principle of the capacitor is based on the accumulation of opposite charges on the two plates of the capacitor. The electric field created by these opposite charges stores energy. The amount of energy stored in the capacitor is proportional to the capacitance of the device. When an AC voltage is applied to the B32654A1104K189, an alternating electric field will be formed which will cause a current to flow and a displacement current to be induced throughout the device. This displacement current is the key factor in the functioning of the capacitor.

Conclusion

In conclusion, film capacitors are widely used in digital circuits, lighting and motor circuits, high frequency networks, AC motor start circuits, EMI compensation, decoupling, filtration, and bypass applications due to their good dielectric properties and high capacitance. B32654A1104K189 is a high-quality film capacitor from EPCOS and is suitable for applications in plasma panel lit TVs, OLED displays, guitar amplifiers, as well as switch-mode power supplies and other high-density power supplies. Its working principle is based on the accumulation of opposite charges on its two plates, and it stores energy in an electric field.

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