Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
MLS103M020EA1A Cornell Dubilier Electronics	CAP ALUM 10000UF 20% 20V FLATPCK	0
CGS362T450W5L Cornell Dubilier Electronics	CAP ALUM 3600UF 450V SCREW	0
MLP331M250EK1A Cornell Dubilier Electronics	CAP ALUM 330UF 20% 250V FLATPACK	0
478CKS025M Cornell Dubilier Electronics	CAP ALUM 4700UF 20% 25V TH	4412400
THAS852M010AA1C Cornell Dubilier Electronics	THINPACK CAP ALUM 8500 10V	0
SLP391M350C9P3 Cornell Dubilier Electronics	CAP ALUM 390UF 20% 350V SNAP	0
158KXM035MQV Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 35V T/H	0
SLPX561M200C3P3 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 200V SNAP	0
CGS932U040V3C Cornell Dubilier Electronics	CAP ALUM 9300UF 40V SCREW	0
CGS422T400W5L Cornell Dubilier Electronics	CAP ALUM 4200UF 400V SCREW	0
HVMLS662M040EA1A Cornell Dubilier Electronics	CAP ALUM 6600UF 20% 40V FLATPACK	0
MLP203M025EB1A Cornell Dubilier Electronics	CAP ALUM 20000UF 20% 25V FLATPCK	0
SLPX101M385A3P3 Cornell Dubilier Electronics	CAP ALUM 100UF 20% 385V SNAP	0
MLS133M010EK1C Cornell Dubilier Electronics	CAP ALUM 13000UF 20% 10V FLATPCK	0
AFK477M80R44T-F Cornell Dubilier Electronics	CAP ALUM 470UF 20% 80V SMD	3
VPR422U010N1L Cornell Dubilier Electronics	CAP ALUM 4200UF 10V RADIAL	0
3186BE153T045APA3 Cornell Dubilier Electronics	CAP ALUM 15000UF 45V SCREW	96
107RSS6R3M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 6.3V T/H	0
SLP271M400E5P3 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 400V SNAP	0
CGH312T350V5L Cornell Dubilier Electronics	CAP ALUM 3100UF 350V SCREW	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.