Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
CG143U035V4C Cornell Dubilier Electronics	CAP ALUM 14000UF 35V SCREW	0
SLP331M200A3P3 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 200V SNAP	387300
SLP121M385A5P3 Cornell Dubilier Electronics	CAP ALUM 120UF 20% 385V SNAP	0
228RZM016M1325 Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 16V T/H	0
381LX271M450K452A Cornell Dubilier Electronics	CAP ALUM 270UF 20% 450V SNAP	0
228CKS063M Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 63V T/H	8000
381LX272M080J452 Cornell Dubilier Electronics	CAP ALUM 2700UF 20% 80V SNAP	0
157SML004M Cornell Dubilier Electronics	CAP ALUM 150UF 20% 4V SMD	0
381LX102M080J012 Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 80V SNAP	1972
CGS242T450W4L Cornell Dubilier Electronics	CAP ALUM 2400UF 450V SCREW	0
LP560M450A1P3 Cornell Dubilier Electronics	CAP ALUM 56UF 20% 450V SNAP	0
276KXM063M Cornell Dubilier Electronics	CAP ALUM 27UF 20% 63V THRU HOLE	0
383LX823M025B052V Cornell Dubilier Electronics	CAP ALUM 82000UF 20% 25V SNAP	0
337SML025MD10 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 25V SMD	0
SLP271M250A5P3 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 250V SNAP	0
106NPS035M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 35V SMD	0
107SAK050M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 50V THRU HOLE	0
THA600M450AA0C Cornell Dubilier Electronics	CAP ALUM 60UF 20% 450V T/H	0
381LX393M010J052 Cornell Dubilier Electronics	CAP ALUM 39000UF 20% 10V SNAP	0
383LX122M250A052 Cornell Dubilier Electronics	CAP ALUM 1200UF 20% 250V 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.