400CXW27MEFR8X40

Series:	CXW
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Capacitance:	27µF
Tolerance:	±20%
Voltage - Rated:	400V
ESR (Equivalent Series Resistance):	--
Lifetime @ Temp.:	5000 Hrs @ 105°C
Operating Temperature:	-40°C ~ 105°C
Polarization:	Polar
Ratings:	--
Applications:	General Purpose
Ripple Current @ Low Frequency:	250mA @ 120Hz
Ripple Current @ High Frequency:	375mA @ 10kHz
Lead Spacing:	0.138" (3.50mm)
Size / Dimension:	0.315" Dia (8.00mm)
Height - Seated (Max):	1.654" (42.00mm)
Surface Mount Land Size:	--
Mounting Type:	Through Hole
Package / Case:	Radial, Can

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Aluminum Electrolytic Capacitors

Application Field and Working Principle

Aluminum electrolytic capacitors, also known as “electrolytic capacitors” or “electrochemical capacitors”, are electrical components used in various applications including power supplies, motors, circuit boards and other electronics. They are typically used for filtering and decoupling of AC/DC power or signal, to supply energy during transients, to buffer power inrush, or to provide DC steady-state energy storage.An electrolytic capacitor is a two-terminal device constructed of a metal film or foil and an electrolyte. The metal film is typically toxic lead- or cadmium-based, and has a positive charge on one side. The electrolyte carries a negative charge and is used to electrolytically both bond the two thin layers of aluminum together and to pass current between them when voltage is applied. By utilizing a voltage difference between the two layers of aluminum, an electrical field is created which enables the flow of electricity through the aluminum electrolyte.The main advantage of these capacitors is that they can store much more energy than a regular ceramic capacitor, while also providing higher current densities. This makes them ideal for applications that require a lot of energy storage and transfer such as power supplies and motors. Additionally, their polarised design helps prevent reverse-voltage damage to the capacitor and its components.Aluminum electrolytic capacitors range in size and voltage ratings to cover a variety of applications, from low-voltage decoupling capacitors to extremely high-voltage snubber capacitors for motor control circuits. Some popular parameters for aluminum electrolytic capacitors include the 400CXW27MEFR8X40 (or "SMD Aluminum CXT Series"). This series is suitable for use with very high voltage, high frequency AC/DC power or signal transfers and has a broad range of capacitance and working voltage options with a low ESR.Despite the many benefits of aluminum electrolytic capacitors, they are limited by their capacity to withstand high temperatures and their limited lifetime due to leakage and other reliability issues, especially with the older lead-based electrolytes. Additionally, due to the thin oxide layer, they must be handled cautiously as they can easily be shorted by shock or impact.In conclusion, aluminum electrolytic capacitors are highly valued for their ability to store and transfer significant amounts of power and can be used in a wide variety of applications. Although some of their limitations should be taken into consideration, they still remain a desirable choice for industries requiring high power transfer such as power supplies and motor controls.

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