400RX304.7M8X20

Polarization:	Polar
Package / Case:	Radial, Can
Mounting Type:	Through Hole
Surface Mount Land Size:	--
Height - Seated (Max):	0.866" (22.00mm)
Size / Dimension:	0.315" Dia (8.00mm)
Lead Spacing:	0.138" (3.50mm)
Ripple Current @ High Frequency:	120mA @ 100kHz
Ripple Current @ Low Frequency:	24mA @ 120Hz
Applications:	Automotive
Ratings:	AEC-Q200
Series:	RX30
Operating Temperature:	-25°C ~ 130°C
Lifetime @ Temp.:	2000 Hrs @ 130°C
ESR (Equivalent Series Resistance):	--
Voltage - Rated:	400V
Tolerance:	±20%
Capacitance:	4.7µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic Capacitors: 400RX304.7M8X20 application field and working principle

Aluminum electrolytic capacitors are typically the most commonly used capacitors in the market today. Due to their reliable performance, low cost, and easy availability, they are often used in various consumer electronics, automotive, industrial and defense applications. In addition, they are widely used in medical electronics, instrumentation, and power supplies due to their ability to exhibit high voltage ratings and very low equivalent series resistance (ESR) values. The 400RX304.7M8X20 series of aluminum electrolytic capacitors is one of the most commonly used low ESR and high temperature series of capacitors. The general full technical specifications for this series state a voltage rating between 25V and 400V, a capacitance range of 1 to 470 µF, a temperature range of -60°C to +125°C, a ripple current of 10 to 60 mA, and an ESR range of 0.10 to 2.20 mΩ. The standard details of this series usually includes a diameter of 10 mm (maximum), a height of 20mm, a tolerance of ±20%, and a life of 2000-10000 hours at full rated voltage. The various features that make this series of capacitors so special are the high voltage rating (up to 400V), low ESR, excellent high temperature capability, and long life. The working principle of aluminum electrolytic capacitors is based on introducing an electrolyte between two aluminum foils. The use of aluminum foils as electrodes provides for an extremely high capacitance due to their extremely high surface area. The use of electrolyte and its chemical properties allows for a much larger volume of charge for a given area of surface in comparison to other types of capacitors. The combination of aluminum foils and electrolytes works by forming an electrical film (dielectric) in the space between the two foils, which is insured by the electrical properties of the electrolyte. The voltage applied to the capacitor is set by the dielectric constant of the electrolyte. The capacitance value of the capacitor is determined by the area of the aluminum foil sheet, the thickness of the electrolyte, and the distance between the two electrodes. The 400RX304.7M8X20 series of aluminum capacitors is primarily used in high voltage and high temperature applications due to its reliable performance, good temperature capabilities, and the low ESR value. Its high voltage capability makes it ideal for use in automotive, defense, and medical electronics applications, while it’s low ESR value allows it to be used in instrumentation and power supplies applications. In addition, its low cost and easy availability make it a popular choice in the consumer electronics market. Overall, the 400RX304.7M8X20 series of aluminum electrolytic capacitors are a reliable, low cost, and easy to source series of capacitors that provides good performance in high voltage and high temperature applications. Its high voltage rating and low ESR value make it ideal for use in automotive, defense, medical electronics, instrumentation, and power supplies applications.

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