Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
SN010M025ST Cornell Dubilier Electronics	CAP ALUM 1UF 20% 25V RADIAL	358
226TLS016M Cornell Dubilier Electronics	CAP ALUM 22UF 20% 16V AXIAL	0
NLW50-16 Cornell Dubilier Electronics	CAP ALUM 50UF 16V AXIAL	0
381LX821M180K032 Cornell Dubilier Electronics	CAP ALUM 820UF 20% 180V SNAP	0
CGS802U030R3C Cornell Dubilier Electronics	CAP ALUM 8000UF 30V SCREW	10173
227BPS063M Cornell Dubilier Electronics	CAP ALUM 220UF 20% 63V RADIAL	0
826KXM063MJU Cornell Dubilier Electronics	CAP ALUM 82UF 20% 63V THRU HOLE	0
157SVH035MFE Cornell Dubilier Electronics	CAP ALUM 150UF 20% 35V SMD	0
228RZM6R3M1030 Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 6.3V T/H	0
MLP802M025EK1C Cornell Dubilier Electronics	CAP ALUM 8000UF 20% 25V FLATPACK	0
107SVL016MEL Cornell Dubilier Electronics	CAP ALUM 100UF 20% 16V SMD	0
SLPX821M220H3P3 Cornell Dubilier Electronics	CAP ALUM 820UF 20% 220V SNAP	0
SLPX103M035A9P3 Cornell Dubilier Electronics	CAP ALUM 10000UF 20% 35V SNAP	0
SLP681M350H4P3 Cornell Dubilier Electronics	CAP ALUM 680UF 20% 350V SNAP	0
686TTA016M Cornell Dubilier Electronics	CAP ALUM 68UF 20% 16V AXIAL	0
381LX223M035A052 Cornell Dubilier Electronics	CAP ALUM 22000UF 20% 35V SNAP	1669
CG602U025V3C Cornell Dubilier Electronics	CAP ALUM 6000UF 25V SCREW	0
PSU37815A Cornell Dubilier Electronics	CAP ALUM 378UF 125V QC TERM	0
AVE226M35D16T-F Cornell Dubilier Electronics	CAP ALUM 22UF 20% 35V SMD	446
THAS521M150AD0C Cornell Dubilier Electronics	CAP ALUM 520UF 20% 150V T/H	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.