EKMQ251ELL680ML25S

Polarization:	Polar
Package / Case:	Radial, Can
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	1.043" (26.50mm)
Size / Dimension:	0.630" Dia (16.00mm)
Lead Spacing:	0.295" (7.50mm)
Ripple Current @ High Frequency:	486mA @ 100kHz
Ripple Current @ Low Frequency:	270mA @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	KMQ
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	2000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	250V
Tolerance:	±20%
Capacitance:	68µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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# Aluminum Electrolytic CapacitorsAn aluminum electrolytic capacitor is a type of capacitor that uses an electrolyte, an ionic conducting liquid, as one of its plates to store electrical energy electrostatically. Commonly used in electronic circuits, these capacitors come in all shapes and sizes and are often identified with a code such as EKMQ251ELL680ML25S. This type of capacitor is different from the other types of capacitors in that its ability to store electrical energy increases with capacitance. It is usually composed of an anode, a cathode, a separator, and an electrolyte.The anode of the capacitor is typically composed of an aluminum foil, and acts as an electrical contact. The cathode is formed by the electrolyte, which acts as an electrical conductor. Between the anode and the cathode is a separator, a dielectric material which acts as an insulator. Lastly, the electrolyte allows the flow of ions throughout the device, thus providing the capacitor’s dielectric function. The role of the dielectric material between anode and cathode is to promote the accumulation of electrical charge on the capacitor plates. This is known as the electric double layer effect. The double layer effect is characterized by a negative charge on the surface of the anode, which attracts positively charged ions in the electrolyte. The positive charge on the surface of the cathode attracts negatively charged ions in the electrolyte. As the anode is positively charged, the combination of these two electric fields creates a potential difference between the anode and the cathode. This potential difference allows the capacitor to store energy electrostatically. The capacitance of an aluminum electrolytic capacitor varies with temperature, voltage, and frequency. When operated at a steady voltage, the capacitor’s capacitance remains relatively constant. However, when the voltage across the capacitor changes, so does the capacitance. This phenomenon is referred to as capacitance drift.The working principle of the capacitor with the code EKMQ251ELL680ML25S is no different from the general principles of aluminum electrolytic capacitors. It still consists of an anode, a cathode, a dielectric material, and an electrolyte. The anode acts as an electrical contact, the cathode is made of the electrolyte and functions as an electrical conductor, the dielectric material acts as an insulator between anode and cathode, and the electrolyte allows the flow of ions throughout the device, thus providing the capacitor’s capacitance function. Depending on the specific type and model, the capacitance of the EKMQ251ELL680ML25S capacitor may vary based on temperature, voltage, and frequency; however, it will remain relatively constant when operated at a steady voltage.Aluminum electrolytic capacitors are widely used throughout various applications in the electronics industry. Typical applications include filtering, energy storage, power supply decoupling, and bypassing in consumer electronics, automotive electronics, and other electronics products. This type of capacitor is also used in various industrial, medical, and military applications.In summary, aluminum electrolytic capacitors are capacitors that use an electrolyte to store electrical energy electrostatically. The anode is composed of aluminum foil and acts as an electrical contact, while the cathode is made of an electrolyte material acting as an electrical conductor. The capacitor is characterized by a double layer effect, which is responsible for the accumulation of electrical charge on the capacitor plates. Depending on the type and model, the capacitance of an aluminum electrolytic capacitor may vary based on different environmental parameters such as temperature, voltage, and frequency, but it will remain relatively constant when operated at a steady voltage. The EKMQ251ELL680ML25S capacitor is no different from the general principles and is used in many different applications for its ability to store electrical energy.

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