MKP1848625454P4

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Film Capacitors

Film capacitors, also known as plastic film capacitors, are a type of passive electronic components used in all kinds of power electronic circuits. They mainly rely on various capacitive responses such as electrostatic capacitance, dielectric loss, ferroresonance response and relative permittivity to store energy and transfer electrical signals, which are superior to other capacitors in terms of loss, size, and voltage capability. Although aluminum electrolytic capacitors and organic film capacitors are mostly used in AC circuits, film capacitors are the major choice for DC power applications.

MKP1848625454P4

The MKP1848625454P4 is a type of film capacitor with a capacitance range of 18µF to 48µF and voltage range of 625VAC to 454VDC. It has a quick response to transient pressure and low internal impedance, making it ideal for power electronic circuits. Its valve-regulated structure is also well-protected against short-term overpressure and oxidation, and ensures reliable operation in harsh environments.

Application Field

The MKP1848625454P4 is widely used in various power electronic applications, such as:

• DC power supply circuits, including rail power supply systems and automotive power systems.
• AC power supply circuits, such as heavy-duty power supply or voltage stabilization circuits.
• Industrial applications, including drives and motors, heating and cooling systems, and lighting.
• Consumer electronics, such as battery chargers, loudspeakers, and amplifiers.

Working Principle

The working principle of the MKP1848625454P4 is fairly straightforward - when a voltage is applied across it, two thin plates, one made of conductive material and the other of an insulating barrier called a dielectric, act together to store a certain amount of energy. This energy then can be discharged when the voltage is removed. When the AC voltage is applied across the capacitor, its plates are charged with positive and negative charges alternatively, which creates counter electric fields to neutralize each other and no current flows through it. Still, when the capacitor is AC powered, the current flows through the dielectric layer to create an average charge and cause dielectric losses. When a DC voltage is applied, a direct charge is built up in its plates and no current can flow. Its capacitance value depends on the plate area, the distance between the plates, and the permittivity of the dielectric.

Conclusion

The MKP1848625454P4 film capacitor with its quick response to transient pressure and low internal impedance is an ideal choice for a variety of power electronic circuits. Its valve-regulated structure ensures reliability operation in harsh environments, making it suitable for DC power supply circuits, AC power supply circuits, industrial applications, and consumer electronics.

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