ALS71C334QS063

Polarization:	Polar
Package / Case:	Radial, Can - Screw Terminals
Mounting Type:	Chassis Mount
Surface Mount Land Size:	--
Height - Seated (Max):	7.717" (196.00mm)
Size / Dimension:	3.543" Dia (90.00mm)
Lead Spacing:	1.252" (31.80mm)
Impedance:	7 mOhms
Ripple Current @ High Frequency:	43.3A @ 10kHz
Ripple Current @ Low Frequency:	41.7A @ 100Hz
Applications:	General Purpose
Ratings:	--
Series:	ALS71
Operating Temperature:	-40°C ~ 85°C
Lifetime @ Temp.:	5000 Hrs @ 85°C
ESR (Equivalent Series Resistance):	5 mOhm @ 100Hz
Voltage - Rated:	63V
Tolerance:	±20%
Capacitance:	330000µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Aluminum Electrolytic CapacitorsAluminum electrolytic capacitors are one of the most common components found in electrical and electronic systems. They are typically used in applications requiring large capacitance values. The ALS71C334QS063 is a radial lead, aluminum electrolytic capacitor with a rated impedance of 470Ω at 120Hz. It is the higher voltage option in the QS063 range, offering a rated voltage of up to 175VDC.The structure and working principle of an aluminum electrolytic capacitor can be broken down step-by-step. Firstly, the capacitor consists of two electrodes, an aluminum foil anode, and a cathode foil coated with a solid electrolyte made of manganese dioxide. The anode and cathode foils are separated by a layer of paper or PVC, which acts as a separator and prevents contact between the electrodes. The capacitor is then placed into a container before being hermetically sealed and filled with an electrolyte.The flow of current between the anode and cathode is influenced by an electric field generated within the capacitor. This electric field is created by a process called electro-migration, where ions from the electrolyte migrate towards the anode. This migration creates a high concentration of positive ions, known as an oxide layer, on the surface of the aluminum foil. This oxide layer prevents the flow of electrons, causing the anode to become positive and forcing the electrons to flow from the anode to the cathode. This process results in a charge on both electrodes, forming an electric field within the capacitor and allowing the flow of current.The ALS71C334QS063 is typically used in power supplies, AC motor drives, and as a ‘buffer’ in low-voltage filter networks, and is electronicaversed for its long life and low ESR values. Perhaps its most widespread application is within pulse-forming networks, where the capacitor acts to absorb a high energy pulse and redistribute its energy in a controlled fashion, meaning it is ideal for safety systems, such as airbags.In the automotive sector, aluminum electrolytic capacitors, such as the ALS71C334QS063, are also commonly employed to maintain an adequate level of voltage during engine start-up. This protects the vehicle’s electronics as it helps avoid fluctuations in the power supply during engine starting.Aluminum electrolytic capacitors are also used in the telecommunications industry where their stability and high capacitance values are ideal for impedance matching. This allows the current delivered by a signal source to match the input impedance of a load, benefitting signal fidelity. The ALS71C334QS063 offers features to facilitate its use, such as its radial lead and its low equivalent series resistance (ESR). The radial lead allows for quick and easy PCB mounting, whilst the low ESR ensures that the capacitor does not act as an inflater, meaning the voltage and current delivered is in phase.In summary, the ALS71C334QS063 is an aluminum electrolytic capacitor with a rated voltage of up to 175VDC and impedance of 470Ω at 120Hz. It is ideal for applications such as Pulse-Forming Networks, automotive, and telecoms, benefiting from features such as radial lead and low ESR.

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