Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
SEK682M025ST Cornell Dubilier Electronics	CAP ALUM 6800UF 20% 25V RADIAL	0
AVS226M16B12T-F Cornell Dubilier Electronics	CAP ALUM 22UF 20% 16V SMD	0
SLP680M450A3P3 Cornell Dubilier Electronics	CAP ALUM 68UF 20% 450V SNAP	460
567LBB350M2EF Cornell Dubilier Electronics	CAP ALUM 560UF 20% 350V SNAP	0
336RSS025M Cornell Dubilier Electronics	CAP ALUM 33UF 20% 25V THRU HOLE	0
AVE226M25D16T-F Cornell Dubilier Electronics	CAP ALUM 22UF 20% 25V SMD	0
CGS321T450V3C Cornell Dubilier Electronics	CAP ALUM 320UF 450V SCREW	4109
AVE107M16X16T-F Cornell Dubilier Electronics	CAP ALUM 100UF 20% 16V SMD	995
228CKS050MQW Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 50V T/H	0
SLPX123M016C1P3 Cornell Dubilier Electronics	CAP ALUM 12000UF 20% 16V SNAP	0
107SML035M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 35V SMD	6340
MLP371M350EB1C Cornell Dubilier Electronics	CAP ALUM 370UF 20% 350V FLATPACK	0
383LX182M400N102 Cornell Dubilier Electronics	CAP ALUM 1800UF 20% 400V SNAP	14
THAS401M150AC0C Cornell Dubilier Electronics	CAP ALUM 400UF 20% 150V T/H	0
WBR12-450A Cornell Dubilier Electronics	CAP ALUM 12UF 450V AXIAL	0
335CKE200M Cornell Dubilier Electronics	CAP ALUM 3.3UF 20% 200V RADIAL	0
CGS124U016V4C Cornell Dubilier Electronics	CAP ALUM 120000UF 16V SCREW	0
381LX103M025K022 Cornell Dubilier Electronics	CAP ALUM 10000UF 20% 25V SNAP	387
SLPX102M100A3P3 Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 100V SNAP	1100
SLPX822M025C1P3 Cornell Dubilier Electronics	CAP ALUM 8200UF 20% 25V 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.