Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
476CKS450MQW Cornell Dubilier Electronics	CAP ALUM 47UF 20% 450V THRU HOLE	18142700
476BPS063M Cornell Dubilier Electronics	CAP ALUM 47UF 20% 63V RADIAL	0
MLS332M060EB0A Cornell Dubilier Electronics	CAP ALUM 3300UF 20% 60V FLATPACK	0
381LR221M420K032 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 420V SNAP	0
381LX273M010J042 Cornell Dubilier Electronics	CAP ALUM 27000UF 20% 10V SNAP	0
AVE476M35X16T-F Cornell Dubilier Electronics	CAP ALUM 47UF 20% 35V SMD	0
CGS253U050U4C Cornell Dubilier Electronics	CAP ALUM 25000UF 50V SCREW	0
MLP162M100EA0A Cornell Dubilier Electronics	CAP ALUM 1600UF 20% 100V FLATPCK	0
380LX223M035A042 Cornell Dubilier Electronics	CAP ALUM 22000UF 20% 35V SNAP	560
ULP153M010DBF1A0 Cornell Dubilier Electronics	CAP ALUM 15000UF 20% 10V FLTPACK	9
380LX183M050A452 Cornell Dubilier Electronics	CAP ALUM 18000UF 20% 50V SNAP	4852
DCMC692T200BC2B Cornell Dubilier Electronics	CAP ALUM 6900UF 200V SCREW	0
THA322M040AB1C Cornell Dubilier Electronics	THINPACK CAP ALUM 3200 40V	0
MLSG221M250JA0C Cornell Dubilier Electronics	CAP ALUM 220UF 20% 250V FLATPACK	0
337LBA250M2CD Cornell Dubilier Electronics	CAP ALUM 330UF 20% 250V SNAP	0
500C473T025BB2B Cornell Dubilier Electronics	CAP ALUM 47000UF 25V SCREW	60
226CKE063M Cornell Dubilier Electronics	CAP ALUM 22UF 20% 63V RADIAL	0
227CKE035M Cornell Dubilier Electronics	CAP ALUM 220UF 20% 35V RADIAL	0
NLW20-25 Cornell Dubilier Electronics	CAP ALUM 20UF 25V AXIAL	0
380LQ221M450H452 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 450V 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.