Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
337RZM016M Cornell Dubilier Electronics	CAP ALUM 330UF 20% 16V THRU HOLE	0
SLP471M200A7P3 Cornell Dubilier Electronics	CAP ALUM 470UF 20% 200V SNAP	513
THA632M016AA0C Cornell Dubilier Electronics	CAP ALUM 6300UF 20% 16V T/H	0
MLS212M060EA0A Cornell Dubilier Electronics	CAP ALUM 2100UF 20% 60V FLATPACK	0
HVMLS283M5R0EA0D Cornell Dubilier Electronics	CAP ALUM 28000UF 20% 5V FLATPACK	0
MLP771M150EA1A Cornell Dubilier Electronics	CAP ALUM 770UF 20% 150V FLATPACK	0
CGH692T500X8L Cornell Dubilier Electronics	CAP ALUM 6900UF 500V SCREW	0
SLP331M450H7P3 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 450V SNAP	23
107LMX400M2BD Cornell Dubilier Electronics	CAP ALUM 100UF 20% 400V SNAP	0
229LBB016M2EC Cornell Dubilier Electronics	CAP ALUM 22000UF 20% 16V SNAP	0
SLPX181M385A7P3 Cornell Dubilier Electronics	CAP ALUM 180UF 20% 385V SNAP	0
MLS601M150EA0A Cornell Dubilier Electronics	CAP ALUM 600UF 20% 150V FLATPACK	0
AVS477M25G24T-F Cornell Dubilier Electronics	CAP ALUM 470UF 20% 25V SMD	0
SLPX221M450C7P3 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 450V SNAP	0
228TTA100M Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 100V AXIAL	4046
383LX561M450N052 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 450V SNAP	775
107BPA016M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 16V AXIAL	2
LP152M050A1P3 Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 50V SNAP	482
HVMLS383M010EB0C Cornell Dubilier Electronics	CAP ALUM 38000UF 20% 10V FLATPCK	0
SLP470M400A1P3 Cornell Dubilier Electronics	CAP ALUM 47UF 20% 400V SNAP	764

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.