Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
EEE-FK1K470P Panasonic	CAP ALUM 47UF 20% 80V SMD	0
ECA-2AHG101 Panasonic	CAP ALUM 100UF 20% 100V RADIAL	135
EEU-TP1V391 Panasonic	CAP ALUM 390UF 20% 35V RADIAL	6124
EEA-FC0J121 Panasonic	CAP ALUM 120UF 20% 6.3V RADIAL	0
EEU-FR2A101 Panasonic	CAP ALUM 100UF 20% 100V RAD TH	0
EEU-FS1V182S Panasonic	CAP ALUM 1800UF 20% 35V T/H	38
EEE-FN0J152V Panasonic	CAP ALUM 1500UF 6.3VDC 20% SMD	498
EEU-FC1E182 Panasonic	CAP ALUM 1800UF 20% 25V RADIAL	391
EEE-FC1V331AP Panasonic	CAP ALUM 330UF 20% 35V SMD	1476
EEE-HC0J220R Panasonic	CAP ALUM 22UF 20% 6.3V SMD	18749
EEU-FR1H220B Panasonic	CAP ALUM 22UF 20% 50V RADIAL	2303
EEU-FR1J221L Panasonic	CAP ALUM 220UF 20% 63V RADIAL	0
EEE-FP1A471AL Panasonic	CAP ALUM 470UF 10V 20% SMD	995
EEU-FR1E681L Panasonic	CAP ALUM 680UF 20% 25V RADIAL	0
EEU-FC1H470B Panasonic	CAP ALUM 47UF 20% 50V RADIAL	1832
ECA-2VM3R3B Panasonic	CAP ALUM 3.3UF 20% 350V RADIAL	0
EEE-FK1J220P Panasonic	CAP ALUM 22UF 20% 63V SMD	771
EET-HC2S181HA Panasonic	CAP ALUM 180UF 20% 420V SNAP	36
ECA-1AM682B Panasonic	CAP ALUM 6800UF 20% 10V RADIAL	0
EEU-FK0J822B Panasonic	CAP ALUM 8200UF 20% 6.3V RAD TH	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.