MEXY2A223K

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Film Capacitors

Film capacitors, also known as polyester, plastic, or Mylar capacitors, are passive electronic components of a paper-insulated form - layer containing capacitance. Amongst other types of capacitors, film capacitors (MEXY2A223K in particular) are widely used for many applications in the industrial, military, and consumer markets. The most common use of film capacitors is related to filtering, coupling/decoupling, and wave shaping because of their superior characteristics such as temperature stability and electrical reliability.

Application Field

Film capacitors are highly stable, adaptable and reliable passive electronic components. Owing to their advanced features, these capacitors can be used in many applications areas in industrial, medical, audio systems and other settings. In audio systems, they can act as power supplies, providing low power services that eliminate them from generating noise in separate systems. They may also be used to create snubbers and damping networks in power electronics. In medical systems, they can be used to reduce the shock to the patient\'s body when the output power of the medical devices needs to be adjusted or limited. In industrial environments, they can be used as anti-interference filters, coupling/decoupling applications and wave shaping for both AC and DC drives. Besides, they can also be used as EMI/RFI Filters, blocking low frequency AC noise and high frequency noise from passing through a circuit.

Working Principle

Film capacitors generally follow the same principles of any other type of capacitor, such as ceramic or electrolytic. It stores electric charge between two pieces of conducting material (electrodes). The electrodes are separated by a dielectric material, such as a thin film or plastic. The dielectric materials used to construct the film capacitor will affect the capacitance of the device, but its working principle remains the same though the capacitance may vary from device to device. It acts as an electrical shield, blocking low frequency AC noise from passing through the circuit and can also provide coupling and noise-limiting services.

Unlike ceramic capacitors, film capacitors feature low internal resistance which makes them suitable for coupling and decoupling applications and they have exceptional frequency response and stability compared to ceramic capacitors. The dielectric film provides great benefits such as non-polarity, superior temperature stability, and low leakage rate. Thanks to their low leakage rate, film capacitors can be used as a bypass capacitor in order to prevent the fluctuation of the voltage and create a stable circuit. Moreover, the dielectric layers also make it possible to achieve a high capacitance level in a small package.

Conclusion

Film capacitors are passive electronic components offering great features such as temperature stability and electrical reliability. Amongst other types of capacitors, MEXY2A223K is the best representative of the film capacitor family. It is widely used in industrial, medical, audio systems and other settings due to its excellent performance in terms of temperature stability, electrical reliability, and high capacitance in a small package. Film capacitors can be used as anti-interference filters, coupling/decoupling applications, wave shaping for both AC and DC drives, and power supplies. Lastly, the film capacitors have low internal resistance which makes them suitable for coupling and decoupling applications and they have exceptional frequency response.

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