E91F421VSN391MR65T

Polarization:	Polar
Package / Case:	Radial, Can - Snap-In
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	2.657" (67.50mm)
Size / Dimension:	1.181" Dia (30.00mm)
Lead Spacing:	0.394" (10.00mm)
Ripple Current @ High Frequency:	3.289A @ 100kHz
Ripple Current @ Low Frequency:	2.3A @ 120Hz
Applications:	General Purpose
Ratings:	--
Series:	U91F
Operating Temperature:	-25°C ~ 105°C
Lifetime @ Temp.:	5000 Hrs @ 105°C
ESR (Equivalent Series Resistance):	204 mOhm @ 120Hz
Voltage - Rated:	420V
Tolerance:	±20%
Capacitance:	390µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic Capacitors and E91F421VSN391MR65T Application Field and Working Principle

Aluminum electrolytic capacitors are capacitors that use an electrolyte to achieve a larger capacitance per unit volume than other types of capacitors. An electrolytic capacitor is a type of polarized capacitor with two electrodes typically consisting of an anode and a cathode, with a dielectric material being the electrolyte. The anode and cathode are usually made of aluminum and can have a coating to form an electrolyte. The E91F421VSN391MR65T is a aluminum electrolytic capacitor specially designed for use in high temperatures and in severe environmental conditions. It is a cylindrical type capacitor and offers excellent thermal capabilities, high frequency stability, and low leakage current. This aluminum capacitor is constructed from two plates – an anode and a cathode – with an electrolyte between them.The aluminum electrolyte for the E91F421VSN391MR65T is a non-volatile aluminum oxide. This oxide forms a thin, loose layer between the two plates of the capacitor, creating a very high capacitance. The aluminum oxide is an excellent dielectric, giving the capacitor a long life and high reliability. The E91F421VSN391MR65T capacitance value comes from the large area of the electrodes. The anode is made of aluminum, and the cathode is made of an alloy of aluminum, iron, and manganese. Together, they form a higher capacitance value than that of a single electrode.The E91F421VSN391MR65T has a voltage rating of up to 4.05 VDC with a capacitance of 400 to 1000 uF. It is designed to be used in applications such as automotive ECUs, power supplies, telecommunication equipment, switching regulators, and large transformers. Furthermore, the capacitor has a wide operating temperature range (-40 to +125 C) that enables it to operate in severe climates.In terms of its working principle, the capacitor works by storing energy in the form of electric charge. As a polarized capacitor, it only works when voltage is applied in one direction, typically from the anode to the cathode. When this voltage is applied, the capacitor’s electric field causes a buildup of electric charge on the electrodes. This electric charge is then stored and will remain until the voltage is reversed or the energy is released.Aluminum electrolytic capacitors are a great choice for many applications due to their high capacitance value, high current rating, and long life. The use of aluminum, which is relatively inexpensive and abundant, makes aluminum electrolytic capacitors an ideal option for many electronics applications. The E91F421VSN391MR65T is a special version of this type of capacitor, designed specifically for high temperature and harsh environments. With its high capacitance value, low leakage current, and wide operating temperature range, this capacitor is an excellent choice for a variety of electronics applications.

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