Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
HVMLS401M100EK0C Cornell Dubilier Electronics	CAP ALUM 400UF 20% 100V FLATPACK	0
AHA336M2AG24T-F Cornell Dubilier Electronics	CAP ALUM 33UF 20% 100V SMD	0
108LBB100M2CC Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 100V SNAP	0
SLPX103M035E3P3 Cornell Dubilier Electronics	CAP ALUM 10000UF 20% 35V SNAP	4713
VPR112U075N3C Cornell Dubilier Electronics	CAP ALUM 1100UF 75V RADIAL	0
SLPX822M025A5P3 Cornell Dubilier Electronics	CAP ALUM 8200UF 20% 25V SNAP	0
CGS123U100V3C Cornell Dubilier Electronics	CAP ALUM 12000UF 100V SCREW	0
SLP822M035A9P3 Cornell Dubilier Electronics	CAP ALUM 8200UF 20% 35V SNAP	986
476KBM050M Cornell Dubilier Electronics	CAP ALUM 47UF 20% 50V THRU HOLE	16000
380LX271M315K022 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 315V SNAP	0
AXLH901P063EL Cornell Dubilier Electronics	CAP ALUM 900UF 63V AXIAL	109750
HES502G350X5C Cornell Dubilier Electronics	CAP ALUM 5000UF 350V SCREW	0
277LMH350M2BF Cornell Dubilier Electronics	CAP ALUM 270UF 20% 350V SNAP	0
SLPX562M063H3P3 Cornell Dubilier Electronics	CAP ALUM 5600UF 20% 63V SNAP	0
CGR222U030R1N Cornell Dubilier Electronics	CAP ALUM 2200UF 30V SCREW	0
AFC227M25G24T-F Cornell Dubilier Electronics	CAP ALUM 220UF 20% 25V SMD	0
336TLS050M Cornell Dubilier Electronics	CAP ALUM 33UF 20% 50V AXIAL	0
107PUM016M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 16V THRU HOLE	0
380LX471M450A452 Cornell Dubilier Electronics	CAP ALUM 470UF 450V 20% SNAP	10
105SVH050MCR Cornell Dubilier Electronics	CAP ALUM 1UF 20% 50V SMD	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.