MAL218297003E3 Capacitors

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Aluminum - Polymer Capacitors

Aluminum-polymer capacitors are a type of capacitor that is a combination of aluminum and a specialized polymer material, usually Polyethylene Naphthalate (PEN). They have become one of the most popular types of capacitors due to their ability to replace electrolytic capacitors in many applications, while still providing superior electrical performance. Aluminum-polymer capacitors bring together the advantages of ceramic capacitors, aluminum electrolytic capacitors and organic semiconductors, while also offering improved performance parameters, such as lower ESR, ESL and lower dielectric absorption. As such, these capacitors are used in a wide range of applications, from consumer electronics to automotive systems.

MAL218297003E3 Application Field and Working Principle

The MAL218297003E3 is an aluminum-polymer consumer electronics capacitor manufactured by Murata Electronics. This device offers excellent electrical characteristics, such as a large capacitance range from 0.047uF to 5.6uF, and a low ESR (Equivalent Series Resistance) range from 0.086 Ω to 0.97 Ω. This capacitor offers good ripple current characteristics, with a working voltage of 16V, and a maximum working temperature range of 105°C. Additionally, it has a long service life, with a capacitor aging characteristics lifespan of 2000 hours, at an operating temperature of 80°C.

The key feature of the MAL218297003E3 is its nano-phonograph structure, which enables the use of a much thinner dielectric material than other aluminum-polymer capacitors. This structure provides improved capacitance, and improves the rated ripple current durability. The device consists of nanophonograph electrodes, a high-dielectric-constant Polyethylene Naphthalate (PEN) film, and aluminum foil.

When the aluminum-polymer capacitor is connected to a voltage source, a potential difference is created between the two terminals. This causes current to flow through the device, and a charge is stored on each of the electrodes. The positive and negative voltage applied across the device causes a polarized electric field, which creates a force between the two electrodes and causes a flow of current. The force creates a time-varying electric field, leading to a charging and discharging of the capacitor’s charge. This process is known as dielectric absorption.

The MAL218297003E3 is used in a wide range of applications, such as automotive, handheld devices, charger adapter and home audio systems. Additionally, this capacitor can be used as a damping element in the primary filter sections of switching regulators, to reduce ripple, and in high-voltage inverter circuits, to stabilize the waveform. It is also used in low-noise circuits, to reduce noise and residual voltage.

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