Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
NLW100-50 Cornell Dubilier Electronics	CAP ALUM 100UF 50V AXIAL	750
MLP143M035EB0C Cornell Dubilier Electronics	CAP ALUM 14000UF 20% 35V FLATPCK	0
PSU13065A Cornell Dubilier Electronics	CAP ALUM 130UF 165V QC TERM	0
MLS821M200EB1A Cornell Dubilier Electronics	CAP ALUM 820UF 20% 200V FLATPACK	0
SK101M350ST Cornell Dubilier Electronics	CAP ALUM 100UF 20% 350V RADIAL	1822
SLP271M315C5P3 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 315V SNAP	0
336CKE160MLQ Cornell Dubilier Electronics	CAP ALUM 33UF 20% 160V RADIAL	0
THA272M050AC0C Cornell Dubilier Electronics	CAP ALUM 2700UF 50V 24.2 X 53.8L	28
SLPX820M385A1P3 Cornell Dubilier Electronics	CAP ALUM 82UF 20% 385V SNAP	0
380LX182M100K022 Cornell Dubilier Electronics	CAP ALUM 1800UF 20% 100V SNAP	0
476RZM025M Cornell Dubilier Electronics	CAP ALUM 47UF 20% 25V THRU HOLE	0
380LQ681M350A032 Cornell Dubilier Electronics	CAP ALUM 680UF 20% 350V SNAP	0
AVE227M50G24T-F Cornell Dubilier Electronics	CAP ALUM 220UF 20% 50V SMD	0
106SVL050MEW Cornell Dubilier Electronics	CAP ALUM 10UF 20% 50V SMD	0
687LMX200M2DD Cornell Dubilier Electronics	CAP ALUM 680UF 20% 200V SNAP	0
381LQ221M450A022 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 450V SNAP	0
CGR562U040R4C Cornell Dubilier Electronics	CAP ALUM 5600UF 40V SCREW	0
476SML004M Cornell Dubilier Electronics	CAP ALUM 47UF 20% 4V SMD	0
HES302G400W5L Cornell Dubilier Electronics	CAP ALUM 3000UF 400V SCREW	0
157RZM050M Cornell Dubilier Electronics	CAP ALUM 150UF 20% 50V THRU HOLE	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.