Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
381LQ561M250H452 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 250V SNAP	0
477CKH016M Cornell Dubilier Electronics	CAP ALUM 470UF 20% 16V THRU HOLE	0
AVS476M50G24T-F Cornell Dubilier Electronics	CAP ALUM 47UF 20% 50V SMD	0
AVES336M10C12T-F Cornell Dubilier Electronics	CAP ALUM 33UF 20% 10V SMD	0
CGS412T300W4C Cornell Dubilier Electronics	CAP ALUM 4100UF 300V SCREW	0
CGS312U100R5C Cornell Dubilier Electronics	CAP ALUM 3100UF 100V SCREW	0
NLW250-12 Cornell Dubilier Electronics	CAP ALUM 250UF 12V AXIAL	0
HVMLS152M060EK0D Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 60V FLATPACK	0
WBR1500-50A Cornell Dubilier Electronics	CAP ALUM 1500UF 50V AXIAL	0
SLP153M035E4P3 Cornell Dubilier Electronics	CAP ALUM 15000UF 20% 35V SNAP	0
SLP391M160A3P3 Cornell Dubilier Electronics	CAP ALUM 390UF 20% 160V SNAP	0
336SVH050MEL Cornell Dubilier Electronics	CAP ALUM 33UF 20% 50V SMD	0
478RZM035M Cornell Dubilier Electronics	CAP ALUM 4700UF 20% 35V T/H	0
MLS112M075EK1C Cornell Dubilier Electronics	CAP ALUM 1100UF 20% 75V FLATPACK	0
381LX152M035H202 Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 35V SNAP	0
109CKE016M Cornell Dubilier Electronics	CAP ALUM 10000UF 20% 16V RADIAL	2064200
381LR560M450H012 Cornell Dubilier Electronics	CAP ALUM 56UF 20% 450V SNAP	512
CG113U075X4C Cornell Dubilier Electronics	CAP ALUM 11000UF 75V SCREW	0
478LBA035M2BD Cornell Dubilier Electronics	CAP ALUM 4700UF 20% 35V SNAP	1084
HVMLS331M250EA0C Cornell Dubilier Electronics	CAP ALUM 330UF 20% 250V FLATPACK	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.