Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
MLP331M300EA0C Cornell Dubilier Electronics	CAP ALUM 330UF 20% 300V FLATPACK	0
SEK010M050ST Cornell Dubilier Electronics	CAP ALUM 1UF 20% 50V RADIAL	1785
AFC476M25E16T-F Cornell Dubilier Electronics	CAP ALUM 47UF 20% 25V SMD	0
SLP681M180C5P3 Cornell Dubilier Electronics	CAP ALUM 680UF 20% 180V SNAP	0
382LX152M250A052 Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 250V SNAP	2048
CGS134U050W5L Cornell Dubilier Electronics	CAP ALUM 130000UF 50V SCREW	0
MLP193M7R5EK0D Cornell Dubilier Electronics	CAP ALUM 19000UF 20% 7.5V FLTPCK	0
381LR331M400A022 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 400V SNAP	536
SLPX152M100A5P3 Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 100V SNAP	0
AVE107M10E16T-F Cornell Dubilier Electronics	CAP ALUM 100UF 20% 10V SMD	0
SLP153M016E1P3 Cornell Dubilier Electronics	CAP ALUM 15000UF 20% 16V SNAP	0
CGS563U050X3L Cornell Dubilier Electronics	CAP ALUM 56000UF 50V SCREW	51164
AHA476M25D16T-F Cornell Dubilier Electronics	CAP ALUM 47UF 20% 25V SMD	0
CG333U050X5L Cornell Dubilier Electronics	CAP ALUM 33000UF 50V SCREW	0
HVMLS173M020EB0A Cornell Dubilier Electronics	CAP ALUM 17000UF 20% 20V FLATPCK	0
SLPX123M016A3P3 Cornell Dubilier Electronics	CAP ALUM 12000UF 20% 16V SNAP	0
383LX123M063A052 Cornell Dubilier Electronics	CAP ALUM 12000UF 20% 63V SNAP	156
CGS322T350W4C Cornell Dubilier Electronics	CAP ALUM 3200UF 350V SCREW	0
PSU8815 Cornell Dubilier Electronics	CAP ALUM 88UF 125V QC TERM	13304
380LX821M400A062 Cornell Dubilier Electronics	CAP ALUM 820UF 20% 400V 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.