Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
UPJ2V330MHD Nichicon	CAP ALUM 33UF 20% 350V RADIAL	41
UMW1A220MDD1TE Nichicon	CAP ALUM 22UF 20% 10V RADIAL	0
UUX1H101MNL1GS Nichicon	CAP ALUM 100UF 20% 50V SMD	60
EEU-FR1J121B Panasonic	CAP ALUM 120UF 20% 63V RADIAL	33
LNR1V333MSE Nichicon	CAP ALUM 33000UF 20% 35V SCREW	170
ALC80D271EB450 KEMET	SNAP-IN HIGH CV 105C 270UF 450V	0
AVS226M50E16T-F Cornell Dubilier Electronics	CAP ALUM 22UF 20% 50V SMD	0
EKY-500ELL151MJC5S United Chemi-Con	CAP ALUM 150UF 20% 50V RADIAL	349
450MXK680MEFCSN35X45 Rubycon	CAP ALUM 680UF 20% 450V SNAP	0
ALS81P752NP400 KEMET	CAP ALUM 7500UF 20% 400V SCREW	0
UVY0J332MPD Nichicon	CAP ALUM 3300UF 20% 6.3V RADIAL	925
UVR0J101MDD Nichicon	CAP ALUM 100UF 20% 6.3V RADIAL	6982
LNC2G102MSEF Nichicon	CAP ALUM 1000UF 20% 400V SCREW	3
MAL202129331E3 Vishay BC Components/Beyshlag/Draloric	CAP ALUM 330UF 20% 100V AXIAL	0
EKMR451VSN271MR30S United Chemi-Con	CAP ALUM 270UF 20% 450V SNAP	0
UHV1A102MPD6TA Nichicon	CAP ALUM 1000UF 20% 10V RADIAL	0
ALF20C102EL450 KEMET	CAP ALU 1000UF 20% 450V PRESSFIT	84
EKZN630ELL152MLP1S United Chemi-Con	CAP ALUM 1500UF 20% 63V RADIAL	26
860240575006 Würth Elektronik Midcom	CAP 100 UF 20% 35 V	474
UUX1J100MCL1GS Nichicon	CAP ALUM 10UF 20% 63V SMD	469

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.