Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
688SAK016M Cornell Dubilier Electronics	CAP ALUM 6800UF 20% 16V T/H	0
3186FE332M400MPC1 Cornell Dubilier Electronics	CAP ALUM 3300UF 20% 400V SCREW	30
THAS201M300AD1C Cornell Dubilier Electronics	THINPACK CAP ALUM 200 300V	0
227LBB350M2BF Cornell Dubilier Electronics	CAP ALUM 220UF 20% 350V SNAP	0
SLP221M450H3P3 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 450V SNAP	0
381LX332M100K052 Cornell Dubilier Electronics	CAP ALUM 3300UF 20% 100V SNAP	83
DCM472U075AH2B Cornell Dubilier Electronics	CAP ALUM 4700UF 75V SCREW	0
687LBA100M2BC Cornell Dubilier Electronics	CAP ALUM 680UF 20% 100V SNAP	0
383LX473M050B082VS Cornell Dubilier Electronics	CAP ALUM 47000UF 20% 50V SNAP	112
381LX271M180H012 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 180V SNAP	0
WBR100-150A Cornell Dubilier Electronics	CAP ALUM 100UF 150V AXIAL	0
SLPX221M350A5P3 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 350V SNAP	0
PSU18935A Cornell Dubilier Electronics	CAP ALUM 189UF 250V QC TERM	16
476BPS025M Cornell Dubilier Electronics	CAP ALUM 47UF 20% 25V RADIAL	0
159LBB035M2DE Cornell Dubilier Electronics	CAP ALUM 15000UF 20% 35V SNAP	0
SLPX821M160E3P3 Cornell Dubilier Electronics	CAP ALUM 820UF 20% 160V SNAP	0
CGS323U040V4C Cornell Dubilier Electronics	CAP ALUM 32000UF 40V SCREW	0
381LX153M025A022 Cornell Dubilier Electronics	CAP ALUM 15000UF 25V 20% SNAP	224
SLP183M010C3P3 Cornell Dubilier Electronics	CAP ALUM 18000UF 20% 10V SNAP	0
SLPX182M100E1P3 Cornell Dubilier Electronics	CAP ALUM 1800UF 20% 100V 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.