Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
LNT2W392MSEG Nichicon	CAP ALUM 3900UF 20% 450V SCREW	9
UKL1E680MPDANATD Nichicon	CAP ALUM 68UF 20% 25V RADIAL	0
UPTW6220MHD1TO Nichicon	CAP ALUM 22UF 20% 420V RADIAL	432
UHV1C101MDD1TA Nichicon	CAP ALUM 100UF 20% 16V RADIAL	0
UPM1C182MHD6TN Nichicon	CAP ALUM 1800UF 20% 16V RADIAL	193
UHW1E222MHD Nichicon	CAP ALUM 2200UF 20% 25V RADIAL	0
LLS1V223MELC Nichicon	CAP ALUM 22000UF 20% 35V SNAP	4805
UHW1C222MHD Nichicon	CAP ALUM 2200UF 20% 16V RADIAL	1194
URS1V220MDD1TA Nichicon	CAP ALUM 22UF 20% 35V RADIAL	0
UCD0J222MCL1GS Nichicon	CAP ALUM 2200UF 20% 6.3V SMD	0
UPJ1V561MHD6TN Nichicon	CAP ALUM 560UF 20% 35V RADIAL	32
UFW1J470MED1TA Nichicon	CAP ALUM 47UF 20% 63V RADIAL	0
UCS2W6R8MPD Nichicon	CAP ALUM 6.8UF 20% 450V RADIAL	0
UVP2A010MDD1TD Nichicon	CAP ALUM 1UF 20% 100V RADIAL	3325
UUJ2A101MNQ6MS Nichicon	CAP ALUM 100UF 20% 100V SMD	237
UVR1E330MDD6 Nichicon	CAP ALUM 33UF 20% 25V RADIAL	0
UPA1C472MHD Nichicon	CAP ALUM 4700UF 20% 16V RADIAL	0
USA1C470MDD1TP Nichicon	CAP ALUM 47UF 20% 16V RADIAL	3503
UKL1C221MPDANATD Nichicon	CAP ALUM 220UF 20% 16V RADIAL	0
UPJ1C122MHD Nichicon	CAP ALUM 1200UF 20% 16V RADIAL	889

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.