Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
EEU-FC1E471LC Panasonic	CAP ALUM 470UF 20% 25V RADIAL	0
EEU-FR1V471L Panasonic	CAP ALUM 470UF 20% 35V RADIAL	4214
EEE-HBJ101UAR Panasonic	CAP ALUM 100UF 20% 6.3V SMD	1833
EEU-FS2A181B Panasonic	CAP ALUM 180UF 20% 100V THRUHOLE	2000
EEE-FKJ471XSV Panasonic	CAP ALUM 470UF 20% 6.3V SMD	900
EEU-FR1C392L Panasonic	CAP ALUM 3900UF 20% 16V RADIAL	165
EEU-FP1E102 Panasonic	CAP ALUM 1000UF 20% 25V THRUHOLE	0
EEU-FR0J182 Panasonic	CAP ALUM 1800UF 20% 6.3V RADIAL	13
ECA-2WHG3R3B Panasonic	CAP ALUM 3.3UF 20% 450V RADIAL	79
EEU-FC1J221SB Panasonic	CAP ALUM 220UF 20% 63V RADIAL	2556
EEA-FC1A220H Panasonic	CAP ALUM 22UF 20% 10V RADIAL	0
EEU-FC0J822 Panasonic	CAP ALUM 8200UF 20% 6.3V RADIAL	4808
ECA-2GHG470 Panasonic	CAP ALUM 47UF 20% 400V RADIAL	0
EEU-ED2E151 Panasonic	CAP ALUM 150UF 20% 250V RADIAL	0
EEU-ED2C820B Panasonic	CAP ALUM 82UF 20% 160V RADIAL	0
EET-ED2W181BA Panasonic	CAP ALUM 180UF 20% 450V SNAP	890
ECA-2DHG4R7BJ Panasonic	CAP ALUM 4.7UF 20% 200V RADIAL	0
EET-HC2S391LA Panasonic	CAP ALUM 390UF 20% 420V SNAP	51
EEU-FS1A562L Panasonic	CAP ALUM 5600UF 20% 10V T/H	755
ECA-2WHG330 Panasonic	CAP ALUM 33UF 20% 450V RADIAL	45

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.