Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
EEV-FC1V4R7R Panasonic	CAP ALUM 4.7UF 20% 35V SMD	8698
EEE-TC1V221UV Panasonic	CAP ALUM 220UF 20% 35V SMD	158
EEE-TC1C331UV Panasonic	CAP ALUM 330UF 20% 16V SMD	500
ECA-1VHG331 Panasonic	CAP ALUM 330UF 20% 35V RADIAL	189
EEE-1CA331AP Panasonic	CAP ALUM 330UF 20% 16V SMD	884
ECE-A1VKA100B Panasonic	CAP ALUM 10UF 20% 35V RADIAL	8514
EEE-HD2A3R3P Panasonic	CAP ALUM 3.3UF 20% 100V SMD	2
EEU-EE2C470 Panasonic	CAP ALUM 47UF 20% 160V RADIAL	0
EEU-FM1C331BJ Panasonic	CAP ALUM 330UF 20% 16V RADIAL	0
EEE-FPC151XAV Panasonic	CAP ALUM 150UF 20% 16V SMD	900
EEU-FC1H100LB Panasonic	CAP ALUM 10UF 20% 50V RADIAL	11318
EEU-FC2A5R6B Panasonic	CAP ALUM 5.6UF 20% 100V RADIAL	0
ECE-A1HN100UB Panasonic	CAP ALUM 10UF 20% 50V RADIAL	6432
EEE-FK0J470UR Panasonic	CAP ALUM 47UF 20% 6.3V SMD	78
EEU-TP1V121B Panasonic	CAP ALUM 120UF 20% 35V RADIAL	1322
EEU-FS1J121B Panasonic	CAP ALUM 120UF 20% 63V THRU HOLE	736
ECA-1CHG102E Panasonic	CAP ALUM 1000UF 20% 16V RADIAL	0
EEE-FK1H470P Panasonic	CAP ALUM 47UF 20% 50V SMD	0
EEU-EB2C220 Panasonic	CAP ALUM 22UF 20% 160V RADIAL	838
EEU-EB1A471B Panasonic	CAP ALUM 470UF 20% 10V 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.