Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
383LX681M450B052VS Cornell Dubilier Electronics	CAP ALUM 680UF 20% 450V SNAP	76
380LQ222M250A062 Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 250V SNAP	1188
CG203U025V4C Cornell Dubilier Electronics	CAP ALUM 20000UF 25V SCREW	0
VPR282U025N2C Cornell Dubilier Electronics	CAP ALUM 2800UF 25V RADIAL	0
381LX183M016H032 Cornell Dubilier Electronics	CAP ALUM 18000UF 20% 16V SNAP	881
227TMA100M Cornell Dubilier Electronics	CAP ALUM 220UF 20% 100V AXIAL	0
SLP472M063H3P3 Cornell Dubilier Electronics	CAP ALUM 4700UF 20% 63V SNAP	0
AVE476M16D16T-F Cornell Dubilier Electronics	CAP ALUM 47UF 20% 16V SMD	2558
106TXK400M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 400V RADIAL	0
381LX331M450K052 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 450V SNAP	0
CGS382T350W4L Cornell Dubilier Electronics	CAP ALUM 3800UF 350V SCREW	0
PSU16165A Cornell Dubilier Electronics	CAP ALUM 161UF 165V QC TERM	0
381LX471M250K022 Cornell Dubilier Electronics	CAP ALUM 470UF 20% 250V SNAP	2
HVMLS601M150EA1A Cornell Dubilier Electronics	CAP ALUM 600UF 20% 150V FLATPACK	0
107BPA025M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 25V AXIAL	0
AEB686M2DU44T-F Cornell Dubilier Electronics	CAP ALUM 68UF 20% 200V SMD	0
THA231M200AB1C Cornell Dubilier Electronics	THINPACK CAP ALUM 230 200V	0
SLPX821M160A4P3 Cornell Dubilier Electronics	CAP ALUM 820UF 20% 160V SNAP	0
381LQ102M180A012 Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 180V SNAP	0
827LMX200M2CG Cornell Dubilier Electronics	CAP ALUM 820UF 20% 200V SNAP	0

Aluminum Electrolytic Capacitors

1. Overview

Aluminum electrolytic capacitors are polarized capacitors using an aluminum oxide layer as the dielectric medium. They consist of an aluminum anode, electrolyte solution, and cathode. These capacitors offer high capacitance values (1 F-2.7F) with relatively compact size, making them essential components in power supply filtering, signal decoupling, and energy storage applications. Their evolution has enabled miniaturization in electronics while maintaining performance in harsh environments.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Radial Lead Type	Vertical mounting with dual leads	Consumer electronics power supplies
SMD Type	Surface-mount design for PCB integration	Computer motherboards
Stud Mount Type	High-current screw terminal design	Industrial inverters
Bi-polar Type	Able to withstand reverse voltage	Motor drive circuits

3. Structure and Composition

Typical construction includes: - Anode Foil: High-purity aluminum with etched surface (100-600m /m effective area) - Dielectric Layer: 0.1-0.8 m thick aluminum oxide (Al O ) - Electrolyte: Ammonium borate solution in organic solvent - Cathode Foil: 50-100 m aluminum sheet - Separator Paper: 50 m thick kraft paper soaked in electrolyte - Aluminum Case: 0.5-2.0mm thick stamped enclosure

4. Key Technical Specifications

Parameter	Description	Importance
Capacitance (C)	1 F-2.7F (120Hz measurement)	Determines filtering effectiveness
Rated Voltage (UR)	6.3V-630V DC working range	Failure risk above limit
ESR	5m -1.5 at 100kHz	Affects switching performance
Ripple Current	100mA-5A RMS	Lifetime predictor
Leakage Current	0.01C UR A maximum	Power efficiency factor
Operating Temp	-55 C to +150 C range	Reliability indicator

5. Application Fields

Power Electronics: Switching power supplies, UPS systems
Consumer Devices: TVs, gaming consoles, LED lighting
Industrial: Variable frequency drives, welding machines
Automotive: On-board chargers, ADAS systems
Renewables: Solar inverters, wind turbine converters

6. Leading Manufacturers

Manufacturer	Headquarters	Representative Product
Nichicon	Japan	UPW Series (105 C, 2000h)
Rubycon	Japan	ZL Series (Low ESR 4m )
United Chemi-Con	USA	KXJ Series (630V rating)
Samxon	Taiwan	EEU-FR Series (Conductive polymer hybrid)

7. Selection Guidelines

Consider these factors: - Required capacitance tolerance ( 20% standard) - Voltage derating (select 1.25 operating voltage) - Temperature range (automotive requires -40 C to +150 C) - Vibration resistance (screw-terminal better than SMD) - Lifetime calculation: Lx = L0 (T0/ T) (UR/UX) - RoHS compliance for environmental regulations

Industry Trends

Current developments include: - Conductive polymer hybrid capacitors (30% ESR reduction) - Nanoscale dielectric engineering (<0.1 m oxide layers) - AI-driven lifetime prediction models - Bio-compatible electrolyte formulations - 4D printing of anode structures - Integration with PCB substrates

Application Case

In a 3kW server power supply, 4x 450V/470 F capacitors in parallel provide 2220 F total capacitance with 14Arms ripple current handling. The design uses Nichicon U3 series devices with 6.5mm lead spacing, operating at 120 C with 95% voltage derating, achieving 8000-hour MTBF.