EKYB630ELL391MK20S

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Aluminum electrolytic capacitors, such as EKYB630ELL391MK20S, commonly used for storage and transmission of electrical energy, are one of the most important components of electronic devices in consumer, automotive and industrial markets. Aluminium electrolytic capacitors require a specific working principles to achieve effective results, as follows:

The main component of aluminum electrolytic capacitors is a pair of aluminum foil plates with aluminum oxide (dielectric) between them. The positive foil is etched, while the negative foil is usually smooth surface. This construction forms an anode, a cathode and an insulating barrier. As current flow through the aluminum anode and the cathode the current is obstructed and impulses accumulate due to the electrical charge provided by the battery.

When the applied voltage reaches the minimum breakdown voltage of the oxide dielectric layer, the insulating barrier breaks down, allowing current to pass between the plates through the insulating barrier. This process is called forming. Once the capacitor has been formed, it is ready to store energy.

When the capacitor is plugged in, a current flows through the capacitor. This means that the capacitance is charged, or capacitance is formed, by forming the oxide layer in between the two plates. During this process, charges accumulate at both plates, creating two outer layers that act as the plates.

When a voltage is applied across the capacitor, an electric field is generated by the positive and negative plates, allowing positive and negative charges to flow in opposite directions and store energy. The electricity is able to pass freely between the anode and the cathode until the capacitance is discharged.

The actual storage capacity of the aluminum electrolytic capacitor depends on the thickness of the oxide dielectric layer, which is determined by the capacitor’s characteristics such as the construction materials, layer orientation, electrical charge and discharge rate, and voltage rating. Generally speaking, capacitors with thinner dielectric layers have higher capacitance ratings, while those with thicker layers have lower capacitance ratings.

The capacitance of aluminum electrolytic capacitors is usually expressed in microfarads (μf). Typically, the capacitance increases with an increase in the thickness of the oxide dielectric layer, and higher capacitance ratings usually require a larger physical size. The maximum voltage rating is determined by the breakdown voltage of the dielectric layer. When the voltage across an aluminum electrolytic capacitor exceeds the breakdown voltage, current leakage will occur and the capacitor will not work properly.

Aluminum electrolytic capacitors are widely used in a variety of applications such as power supplies, converters, lighting, motors, and other power electronics. They can provide a high capacitance value with the least space occupied. Additionally, their cost-effectiveness compared to other capacitors and the wide operating temperature range also make them attractive components for various applications.

EKYB630ELL391MK20S aluminum electrolytic capacitors are used for storage and transmission of electrical energy, specifically for applications in the computer, automotive and industrial markets. In addition to the aforementioned properties, it provides an outstanding ripple current capability, ripple current voltage rating and surge current rating. It has a rated voltage range of 6.3 to 25V and operating temperature range of -40 to +105℃. It is designed with RoHS compliant tin-plated copper terminals and is protected by a PVC sleeving. The capacitors have a long useful life providing reliable performance in tough operating conditions.

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