Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
CGS784U010X5C Cornell Dubilier Electronics	CAP ALUM 780000UF 10V SCREW	0
106SML016MQ5 Cornell Dubilier Electronics	CAP ALUM 10UF 20% 16V SMD	0
HVMLS221M250EK0D Cornell Dubilier Electronics	CAP ALUM 220UF 20% 250V FLATPACK	0
HVMLS221M250EK1C Cornell Dubilier Electronics	CAP ALUM 220UF 20% 250V FLATPACK	0
381LQ271M350J032 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 350V SNAP	0
AFK476M50X16T-F Cornell Dubilier Electronics	CAP ALUM 47UF 20% 50V SMD	6609
THAS103M016AC1C Cornell Dubilier Electronics	THINPACK CAP ALUM 10000 16V	0
382LX682M200B082VS Cornell Dubilier Electronics	CAP ALUM 6800UF 20% 200V SNAP	61
SLP122M250H4P3 Cornell Dubilier Electronics	CAP ALUM 1200UF 20% 250V SNAP	0
CGS192T250V5L Cornell Dubilier Electronics	CAP ALUM 1900UF 250V SCREW	0
MLS221M250EK1D Cornell Dubilier Electronics	CAP ALUM 220UF 20% 250V FLATPACK	0
CGS683U075X5L Cornell Dubilier Electronics	CAP ALUM 68000UF 75V SCREW	0
226SML016MD4 Cornell Dubilier Electronics	CAP ALUM 22UF 20% 16V SMD	0
CGS182T450V5L Cornell Dubilier Electronics	CAP ALUM 1800UF 450V SCREW	0
SLPX122M220E4P3 Cornell Dubilier Electronics	CAP ALUM 1200UF 20% 220V SNAP	0
PSU10835A Cornell Dubilier Electronics	CAP ALUM 108UF 250V QC TERM	11110
381LQ222M200K052 Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 200V SNAP	869
AFC337M06F24T-F Cornell Dubilier Electronics	CAP ALUM 330UF 20% 6.3V SMD	0
MLP662M050EA1C Cornell Dubilier Electronics	CAP ALUM 6600UF 20% 50V FLATPACK	0
SLPX182M160E4P3 Cornell Dubilier Electronics	CAP ALUM 1800UF 20% 160V SNAP	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.