B81141C1103M189

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Film Capacitors

Film capacitors, also known as plastic film capacitors, are a type of capacitor that uses plastic film as its primary dielectric. They are also extremely thin layers, around 0.25μm thick, coated on both sides of the plastic film. Film capacitors\' main characteristics include low equivalent series resistance (ESR), relatively high capacitance and high stability with respect to time and temperature, and low physical profile.

B81141C1103M189

B81141C1103M189 is an X2 class film capacitor type from the EPCOS Group, a world-leading manufacturer of electronic components, modules and embedded systems. This particular type of capacitor is an AC Line Feed Through film capacitor, meaning it is designed specifically for connecting AC power lines. This component is particularly suitable for the filtering and suppression of electromagnetic interference in power distribution, appliances, computer systems, switchboard equipment, electric motor and cabledrive systems.

Application Field

B81141C1103M189 film capacitors are typically used in applications requiring a high degree of capacitance stability over time as well as a low physical profile due to size or space limitations. Some typical applications include:

• Broadband filters
• DC-DC converters
• DC-AC rectifiers
• AC-DC line filters
• EMI/RFI filters
• Resonant converters

Working Principle of B81141C1103M189

The B81141C1103M189 film capacitor works by forming an electrical barrier between two conductive plates. The electric field between the plates creates ionization of the air between them, creating a more efficient path for current and effectively increasing the capacitor\'s capacitance. This electrical barrier has a limited frequency response which is determined by the characteristics of the dielectric film used in the capacitor.

The B81141C1103M189 capacitor is constructed with a film of polypropylene as the dielectric and metallized aluminum as the electrodes. This design makes the B81141C1103M189 an X2 class capacitor, meaning it is designed specifically for AC power line connections and filtering. The metalized aluminum electrodes provide good conductivity and low resistance as well as a higher capacitance value. The polypropylene dielectric is relatively thin and provides good electrical insulation in the X2 class, and the resulting capacitor has excellent capacitance stability over time, temperature, voltage, and frequency.

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