Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
UPV1A221MGD Nichicon	CAP ALUM 220UF 20% 10V RADIAL	0
LKX2W121MESA30 Nichicon	CAP ALUM 120UF 20% 450V SNAP	139
UKW2AR33MDD1TA Nichicon	CAP ALUM 0.33UF 20% 100V RADIAL	0
250PK3.3MEFC6.3X11 Rubycon	CAP ALUM 3.3UF 20% 250V RADIAL	0
380LQ331M450K042 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 450V SNAP	0
100ZL39MEFCT78X16 Rubycon	CAP ALUM 39UF 20% 100V RADIAL	0
MAL212525102E3 Vishay BC Components/Beyshlag/Draloric	CAP ALUM 1000UF 16V 2000H	0
35ML150MEFC8X9 Rubycon	CAP ALUM 150UF 20% 35V RADIAL	0
ALS81G244NT063 KEMET	CAP ALUM 240000UF 20% 63V SCREW	0
EGXF201ELL131MM20S United Chemi-Con	CAP ALUM 130UF 20% 200V RAD TH	0
16YXG120MEFC6.3X11 Rubycon	CAP ALUM 120UF 20% 16V RADIAL	459
EKXJ401ELL560MK35S United Chemi-Con	CAP ALUM 56UF 20% 400V RADIAL	457
EEU-FC1C562 Panasonic	CAP ALUM 5600UF 20% 16V RADIAL	116
B43706B6478M600 TDK EPCOS	ALUMINIUM ELECTROLYTIC SCREW TER	0
UVP1J100MED Nichicon	CAP ALUM 10UF 20% 63V RADIAL	1784
UPJ1V221MPD6TD Nichicon	CAP ALUM 220UF 20% 35V RADIAL	0
UPM2A330MPD1TD Nichicon	CAP ALUM 33UF 20% 100V RADIAL	797
UPM1J121MPD Nichicon	CAP ALUM 120UF 20% 63V RADIAL	1434
ELXV350ELL272ML40S United Chemi-Con	CAP ALUM 2700UF 20% 35V RADIAL	0
EKZN100ELL182MJ20S United Chemi-Con	CAP ALUM 1800UF 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.