Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
EEU-TA1V221B Panasonic	CAP ALUM 220UF 20% 35V RADIAL	0
EEE-FN0J681P Panasonic	CAP ALUM 680UF 6.3VDC 20% SMD	1480
EEU-EE2V470S Panasonic	CAP ALUM 47UF 20% 350V RADIAL	352
EEU-FR1V222 Panasonic	CAP ALUM 2200UF 20% 35V RADIAL	989
ECE-A1AKA101B Panasonic	CAP ALUM 100UF 20% 10V RADIAL	0
EEU-FR1C152L Panasonic	CAP ALUM 1500UF 20% 16V RADIAL	1518
ECE-A1AN472U Panasonic	CAP ALUM 4700UF 20% 10V RADIAL	473
ECA-2EHG4R7B Panasonic	CAP ALUM 4.7UF 20% 250V RADIAL	1701
EEE-FT1E330AR Panasonic	CAP ALUM 33UF 20% 25V SMD	0
EEE-FK1H101L Panasonic	CAP ALUM 100UF 50V 20% SMD	945
EEU-FR1C102B Panasonic	CAP ALUM 1000UF 20% 16V RADIAL	437
EEU-EB1J470 Panasonic	CAP ALUM 47UF 20% 63V RADIAL	5487
EEU-EB1V102 Panasonic	CAP ALUM 1000UF 20% 35V RADIAL	639
EEE-FN1V221V Panasonic	CAP ALUM 220UF 35VDC 20% SMD	495
EEU-FC1J820 Panasonic	CAP ALUM 82UF 20% 63V RADIAL	0
EEV-FK1E331GP Panasonic	CAP ALUM 330UF 20% 25V SMD	4
EEU-FS0J182L Panasonic	CAP ALUM 1800UF 20% 6.3V T/H	1850
EEE-FK1A102GP Panasonic	CAP ALUM 1000UF 20% 10V SMD	16
EEV-HB1E100R Panasonic	CAP ALUM 10UF 20% 25V SMD	2895
EEE-FT1E821AP Panasonic	CAP ALUM 820UF 20% 25V SMD	3505

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.