Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
SLP221M385E3P3 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 385V SNAP	0
380LX102M200J452 Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 200V SNAP	0
380LQ681M250J032 Cornell Dubilier Electronics	CAP ALUM 680UF 20% 250V SNAP	0
156TLS025M Cornell Dubilier Electronics	CAP ALUM 150UF 20% 25V AXIAL	0
SLP101M350A1P3 Cornell Dubilier Electronics	CAP ALUM 100UF 20% 350V SNAP	0
SLPX153M010A3P3 Cornell Dubilier Electronics	CAP ALUM 15000UF 20% 10V SNAP	0
SLP473M010H5P3 Cornell Dubilier Electronics	CAP ALUM 47000UF 20% 10V SNAP	0
SEK010M160ST Cornell Dubilier Electronics	CAP ALUM 1UF 20% 160V RADIAL	0
HVMLS132M100EB0C Cornell Dubilier Electronics	CAP ALUM 1300UF 20% 100V FLATPCK	0
107RZM050M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 50V THRU HOLE	250121000
108LBA100M2CC Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 100V SNAP	500
383LX183M063A082 Cornell Dubilier Electronics	CAP ALUM 18000UF 20% 63V SNAP	47
381LQ681M315A032 Cornell Dubilier Electronics	CAP ALUM 680UF 20% 315V SNAP	0
CGS233U016V3C Cornell Dubilier Electronics	CAP ALUM 23000UF 16V SCREW	0
107TTA250M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 250V AXIAL	290
337KXM035M Cornell Dubilier Electronics	CAP ALUM 330UF 20% 35V THRU HOLE	2000
CGS951T500V4C Cornell Dubilier Electronics	CAP ALUM 950UF 500V SCREW	0
MLP331M400EB0C Cornell Dubilier Electronics	CAP ALUM 330UF 20% 400V FLATPACK	0
CGR152T075U2C Cornell Dubilier Electronics	CAP ALUM 1500UF 75V SCREW	0
381LX392M063J452 Cornell Dubilier Electronics	CAP ALUM 3900UF 20% 63V SNAP	31

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.