Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
158LBB200M2EF Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 200V SNAP	0
336CKE250M Cornell Dubilier Electronics	CAP ALUM 33UF 20% 250V RADIAL	0
108RZM035M1325 Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 35V T/H	0
108LBB100M2BD Cornell Dubilier Electronics	CAP ALUM 1000UF 20% 100V SNAP	0
380LQ331M450K042 Cornell Dubilier Electronics	CAP ALUM 330UF 20% 450V SNAP	0
381LR181M420H452 Cornell Dubilier Electronics	CAP ALUM 180UF 20% 420V SNAP	0
LPX561M200C5P3 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 200V SNAP	0
MLS113M040EB0A Cornell Dubilier Electronics	CAP ALUM 11000UF 20% 40V FLATPCK	61
AVS226M50E16T-F Cornell Dubilier Electronics	CAP ALUM 22UF 20% 50V SMD	0
CGS703U016V4C Cornell Dubilier Electronics	CAP ALUM 70000UF 16V SCREW	0
PSU3065A Cornell Dubilier Electronics	CAP ALUM 33UF 165V QC TERM	0
335SML100M Cornell Dubilier Electronics	CAP ALUM 3.3UF 20% 100V SMD	0
381LX471M400A052 Cornell Dubilier Electronics	CAP ALUM 470UF 20% 400V SNAP	2
SLP152M160E4P3 Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 160V SNAP	0
SLPX822M080H4P3 Cornell Dubilier Electronics	CAP ALUM 8200UF 20% 80V SNAP	0
CGS332T450X5L Cornell Dubilier Electronics	CAP ALUM 3300UF 450V SCREW	0
CG223U035W4C Cornell Dubilier Electronics	CAP ALUM 22000UF 35V SCREW	0
SLPX121M385C1P3 Cornell Dubilier Electronics	CAP ALUM 120UF 20% 385V SNAP	0
381LR681M200J032 Cornell Dubilier Electronics	CAP ALUM 680UF 20% 200V SNAP	2317
224SML050MD4 Cornell Dubilier Electronics	CAP ALUM 0.22UF 20% 50V SMD	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.