Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
106TTA250M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 250V AXIAL	11824200
158KXM035M Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 35V T/H	0
NLW8-50 Cornell Dubilier Electronics	CAP ALUM 8UF 50V AXIAL	0
336SML010M Cornell Dubilier Electronics	CAP ALUM 33UF 20% 10V SMD	0
477LBB250M2BF Cornell Dubilier Electronics	CAP ALUM 470UF 20% 250V SNAP	0
HVMLS283M5R0EA1A Cornell Dubilier Electronics	CAP ALUM 28000UF 20% 5V FLATPACK	0
382LX102M450B062V Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 450V SNAP	0
CGR742U040R5C Cornell Dubilier Electronics	CAP ALUM 7400UF 40V SCREW	0
381LR391M200H022 Cornell Dubilier Electronics	CAP ALUM 390UF 20% 200V SNAP	14
335TTA450M Cornell Dubilier Electronics	CAP ALUM 3.3UF 20% 450V AXIAL	7907
109CKE6R3M Cornell Dubilier Electronics	CAP ALUM 10000UF 20% 6.3V RADIAL	0
SEK330M400ST Cornell Dubilier Electronics	CAP ALUM 33UF 20% 400V RADIAL	1556
SEK101M035ST Cornell Dubilier Electronics	CAP ALUM 100UF 20% 35V RADIAL	123
381LQ393M016K042 Cornell Dubilier Electronics	CAP ALUM 39000UF 20% 16V SNAP	0
CG952U050V4C Cornell Dubilier Electronics	CAP ALUM 9500UF 50V SCREW	0
106CKR063M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 63V THRU HOLE	16974
THA311M250AD1C Cornell Dubilier Electronics	THINPACK CAP ALUM 310 250V	0
HVMLS561M250EB0A Cornell Dubilier Electronics	CAP ALUM 560UF 20% 250V FLATPACK	0
381LQ561M180H022 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 180V SNAP	0
SLP331M220A5P3 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 220V 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.