Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
CGS203U040V5L Cornell Dubilier Electronics	CAP ALUM 20000UF 40V SCREW	0
380LX471M100H012 Cornell Dubilier Electronics	CAP ALUM 470UF 20% 100V SNAP	160
CG403U016V4C Cornell Dubilier Electronics	CAP ALUM 40000UF 16V SCREW	0
477SML016MD10 Cornell Dubilier Electronics	CAP ALUM 470UF 20% 16V SMD	0
477CKS063M Cornell Dubilier Electronics	CAP ALUM 470UF 20% 63V THRU HOLE	0
AFK106M35C12T-F Cornell Dubilier Electronics	CAP ALUM 10UF 20% 35V SMD	2714
336SML010MD4 Cornell Dubilier Electronics	CAP ALUM 33UF 20% 10V SMD	0
381LX332M080J052 Cornell Dubilier Electronics	CAP ALUM 3300UF 20% 80V SNAP	1040
CGS182T500W4L Cornell Dubilier Electronics	CAP ALUM 1800UF 500V SCREW	0
SEK220M250ST Cornell Dubilier Electronics	CAP ALUM 22UF 20% 250V RADIAL	235
381LX222M063J022 Cornell Dubilier Electronics	CAP ALUM 2200UF 63V 20% SNAP	15
AVS477M10F24T-F Cornell Dubilier Electronics	CAP ALUM 470UF 20% 10V SMD	0
VPR451U075N1L Cornell Dubilier Electronics	CAP ALUM 450UF 75V RADIAL	0
CG102U100R4C Cornell Dubilier Electronics	CAP ALUM 1000UF 100V SCREW	0
382LX471M500N052 Cornell Dubilier Electronics	CAP ALUM 470UF 20% 500V SNAP	0
338RZM016M1625 Cornell Dubilier Electronics	CAP ALUM 3300UF 20% 16V T/H	0
225SMH050MHR Cornell Dubilier Electronics	CAP ALUM 2.2UF 20% 50V SMD	1975
401C113M063AH8 Cornell Dubilier Electronics	CAP ALUM 11000UF 20% 63V RADIAL	0
381LX561M315A042 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 315V SNAP	0
382LX223M050A052 Cornell Dubilier Electronics	CAP ALUM 22000UF 20% 50V SNAP	2150

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.