Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
EET-HC2E681BA Panasonic	CAP ALUM 680UF 20% 250V SNAP	468
EEE-FN1A152UP Panasonic	CAP ALUM 1500UF 10VDC 20% SMD	0
EEE-1AA330AR Panasonic	CAP ALUM 33UF 20% 10V SMD	24
EEE-0JA102UP Panasonic	CAP ALUM 1000UF 20% 6.3V SMD	0
EEU-EB1J4R7S Panasonic	CAP ALUM 4.7UF 20% 63V RADIAL	5280
EEE-TK1J471AM Panasonic	CAP ALUM 470UF 20% 63V SMD	4951
EEV-FK1A472M Panasonic	CAP ALUM 4700UF 20% 10V SMD	5528
EEU-FK1A182B Panasonic	CAP ALUM 1800UF 20% 10V RAD TH	0
EEU-FC2A390L Panasonic	CAP ALUM 39UF 20% 100V RADIAL	0
EEU-FC1A681B Panasonic	CAP ALUM 680UF 20% 10V RADIAL	0
ECA-1JM102B Panasonic	CAP ALUM 1000UF 20% 63V RADIAL	0
EEU-ED2V101 Panasonic	CAP ALUM 100UF 20% 350V RADIAL	249
EEE-FK1C101SR Panasonic	SMD AL ELECTROLYTIC, 16VDC, 100U	0
EEU-HD1C221 Panasonic	CAP ALUM 220UF 20% 16V RADIAL	650
ECE-A1CKS101Q Panasonic	CAP ALUM 100UF 20% 16V RADIAL	0
EEU-EB1A221S Panasonic	CAP ALUM 220UF 20% 10V RADIAL	7161
EEE-1JA470P Panasonic	CAP ALUM 47UF 20% 63V SMD	2936
EEE-1EA221UP Panasonic	CAP ALUM 220UF 20% 25V SMD	243
ECA-2CHG470 Panasonic	CAP ALUM 47UF 20% 160V RADIAL	19
EEU-EB1E470SB Panasonic	CAP ALUM 47UF 20% 25V RADIAL	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.