25RX301000M12.5X20

Series:	RX30
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	1000µF
Tolerance:	±20%
Voltage - Rated:	25V
ESR (Equivalent Series Resistance):	--
Lifetime @ Temp.:	4000 Hrs @ 130°C
Operating Temperature:	-40°C ~ 130°C
Polarization:	Polar
Ratings:	AEC-Q200
Applications:	Automotive
Ripple Current @ Low Frequency:	825mA @ 120Hz
Ripple Current @ High Frequency:	1.1A @ 100kHz
Impedance:	55 mOhms
Lead Spacing:	0.197" (5.00mm)
Size / Dimension:	0.492" Dia (12.50mm)
Height - Seated (Max):	0.866" (22.00mm)
Surface Mount Land Size:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Can

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Introduction

Aluminum Electrolytic Capacitors are a type of capacitor with the most commonly used and established technology due to its combination of superior performance, long life, and low cost. These capacitors have an extremely large capacitance range and are used in multiple electronic applications, such as computers, power supplies, audio amplifiers, and consumer electronics. The 25RX301000M12.5X20 aluminum electrolytic capacitor is one example of this type of capacitor and has a variety of applications as well as an interesting working principle.

Application Field

The 25RX301000M12.5X20 aluminum electrolytic capacitor is typically used for medium power applications such as filtering and bypassing. This type of capacitor is especially well-suited for applications where there is a need for low ESR values, low equivalent series resistance, high frequency, and high temperature operation. The 25RX301000M12.5X20 is also effective in low-frequency applications such as audio signal filtering, where its high capacitance and long life make it ideal.The 25RX301000M12.5X20 aluminum electrolytic capacitor is also often used in high-power applications such as switching power supplies, motor drives, and other motor controls. This type of capacitor is often seen in these applications because of its ability to handle high ripple currents and its wide operating temperature range. Its large capacitance and high ESR values are also beneficial in these kinds of applications.

Working Principle

An aluminum electrolytic capacitor is composed of an electrically conductive and aluminum canister. The anode is formed by the aluminum canister and is filled with an electrolytic solution. The electrolytic solution is often a mixture of chemicals, such as sulfates, which cause a buildup of electrons on the anode. A dielectric is placed between two aluminum foils that are placed opposite the anode and the electrolyte solution. This dielectric acts as the capacitor\'s insulator and stores electrical charge in the capacitor.The electrolyte solution within the capacitor breaks down when voltage is applied to it and forms an oxide layer on the anode. This oxide layer acts as the capacitor\'s dielectric, and its thickness is determined by the applied voltage. The oxide layer increases in capacitance as the applied voltage increases. This increase in capacitance is known as the capacitor\'s equivalent series resistance (ESR). The amount of ESR will vary based on the type and size of the capacitor, as well as the frequency and applied voltage of the electrical source.When a voltage is applied to the aluminum electrolytic capacitor, electrons are attracted to the anode and the electrons that were already there are repelled off, creating a current flow. This flow of electrons causes the oxide layer to increase in thickness, which increases the capacitance of the capacitor and is known as the charging process. When the voltage is removed, the charging process is reversed and the capacitor discharges.

Conclusion

The 25RX301000M12.5X20 aluminum electrolytic capacitor is an effective and versatile capacitor that is often used in a variety of electronic applications. Its high capacitance, low ESR values, and wide operating temperature range make it a well-suited choice for medium power applications such as filtering and bypassing, as well as for high-power applications such as switching power supplies and motor drives. Its working principle is based on an oxide layer which increases its capacitance and ESR when voltage is applied, and is reversed when the voltage is removed.

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