ALS81H274QC025

Polarization:	Polar
Package / Case:	Radial, Can - Screw Terminals
Mounting Type:	Chassis Mount
Surface Mount Land Size:	--
Height - Seated (Max):	2.717" (69.00mm)
Size / Dimension:	3.543" Dia (90.00mm)
Lead Spacing:	1.252" (31.80mm)
Impedance:	13 mOhms
Ripple Current @ High Frequency:	20.4A @ 10kHz
Ripple Current @ Low Frequency:	19.8A @ 100Hz
Applications:	General Purpose
Ratings:	--
Series:	ALS81
Operating Temperature:	-40°C ~ 105°C
Lifetime @ Temp.:	2000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	13 mOhm @ 100Hz
Voltage - Rated:	25V
Tolerance:	±20%
Capacitance:	270000µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic Capacitors

Aluminium electrolytic capacitors, also referred to as electrolyte capacitors, are widely used electronic components consisting of a core of two metal electrodes, an electrolyte and a paper dielectric. The main feature of these capacitors is their high capacitance value for a given physical size and their high stability. As such, they are used in a wide range of electronic devices, such as high precision measurement equipment, medical equipment, and a wide variety of other applications where reliability and precision are considered critical.Specifically, the ALS81H274QC025 model belongs to the style of long-life aluminum electrolytic capacitors which is commonly used today. The capacitance of this model is 270uF and it has an operating temperature range of -40°C to +105°C. It is a high voltage, long life, low equivalent series resistance (ESR) and high ripple current aluminum electrolytic capacitor. The common applications involve power regulators, auxiliaries, fly back transformers, UPS, and switching power supplies.The working principle of these capacitors is fairly straightforward, but the processes involved in their construction are a bit more complex. Generally speaking, the capacitor is constructed from two thin metal plates (the anode and the cathode) separated by a thin insulating paper layer. The metal plates are then immersed in an electrolyte solution, typically a dilute solution of organic acids such as ethylene glycol or propylene.The electrolyte solution produces an ionic charge within the capacitor, and this charge is the basis for the device\'s storage of an electrical charge. The capacitance of the device is proportional to the area of the electrodes, the distance between them and the type of dielectric material used. When applying a voltage across the capacitor\'s terminals, a current will flow and charges will be stored on the plates. This process will continue until the voltage across the capacitor\'s terminals reaches a certain point at which point no further current can flow and the capacitor is said to be "fully charged".However, when the voltage is reversed, the current continues to flow until all the stored charges have been discharged. This process is known as "reverse leakage" and it is one of the factors that determines the life usage of the aluminum electrolytic capacitor. Generally speaking, the lower the reverse leakage, the longer the capacitor will be able to function.In conclusion, the ALS81H274QC025 aluminum electrolytic capacitor is a high voltage, long-life, low equivalent series resistance (ESR) and high ripple current aluminum electrolytic capacitor that is used in various electronic components and devices requiring high precision and reliability. It has many applications such as being used in power regulators, auxiliaries, fly back transformers, UPS, and switching power supplies. The working principle behind this device is based on the charge stored on two metal plates separated by a thin insulating paper layer immersed in an electrolyte solution. Additionally, the life usage of this capacitor is largely dependent on its reverse leakage.

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