Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
B43540C9277M62 TDK EPCOS	CAP ALUM 270UF 20% 400V SNAP	0
ESE477M016AG3AA KEMET	CAP ALUM 470UF 20% 16V RADIAL	5839
LGGW6151MELZ35 Nichicon	CAP ALUM 150UF 20% 420V SNAP	141
B43254A4107M TDK EPCOS	CAP ALUM 100UF 20% 350V SNAP	0
ECA-1CM222 Panasonic	CAP ALUM 2200UF 20% 16V RADIAL	0
50YXH2200MEFC18X35.5 Rubycon	CAP ALUM 2200UF 20% 50V RADIAL	0
SLP333M016H5P3 Cornell Dubilier Electronics	CAP ALUM 33000UF 20% 16V SNAP	0
EEV-TA1E101P Panasonic	CAP ALUM 100UF 20% 25V SMD	6685
URS1C682MHD1TN Nichicon	CAP ALUM 6800UF 20% 16V RADIAL	240
UPW1H180MDD1TD Nichicon	CAP ALUM 18UF 20% 50V RADIAL	1825
EEE-FT1V101AP Panasonic	CAP ALUM 100UF 20% 35V SMD	0
HVMLS272M075EB1A Cornell Dubilier Electronics	CAP ALUM 2700UF 20% 75V FLATPACK	0
UPM1E820MED Nichicon	CAP ALUM 82UF 20% 25V RADIAL	3220
UPM1A680MDD1TA Nichicon	CAP ALUM 68UF 20% 10V RADIAL	0
381LX561M180J032 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 180V SNAP	0
B43255A9227M TDK EPCOS	CAP ALUM 220UF 20% 400V SNAP	150
UPM1A152MHD6 Nichicon	CAP ALUM 1500UF 20% 10V RADIAL	0
UVK2W470MHD Nichicon	CAP ALUM 47UF 20% 450V RADIAL	84
25YXH1000MEFC10X28 Rubycon	CAP ALUM 1000UF 20% 25V RADIAL	0
USR1H220MDD1TE Nichicon	CAP ALUM 22UF 20% 50V 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.