Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
SLP561M315E4P3 Cornell Dubilier Electronics	CAP ALUM 560UF 20% 315V SNAP	0
SLP472M025A1P3 Cornell Dubilier Electronics	CAP ALUM 4700UF 20% 25V SNAP	0
105AXZ050M Cornell Dubilier Electronics	CAP ALUM 1UF 20% 50V SMD	0
PSU6465A Cornell Dubilier Electronics	CAP ALUM 64UF 165V QC TERM	0
SLP333M010H3P3 Cornell Dubilier Electronics	CAP ALUM 33000UF 20% 10V SNAP	0
187LBB450M2BH Cornell Dubilier Electronics	CAP ALUM 180UF 20% 450V SNAP	0
550C102T400BJ2B Cornell Dubilier Electronics	CAP ALUM 1000UF 400V SCREW	18
CGS133U075R4C Cornell Dubilier Electronics	CAP ALUM 13000UF 75V SCREW	0
381LR151M450K022 Cornell Dubilier Electronics	CAP ALUM 150UF 20% 450V SNAP	0
336RZM035M Cornell Dubilier Electronics	CAP ALUM 33UF 20% 35V THRU HOLE	0
382LX471M450A052 Cornell Dubilier Electronics	CAP ALUM 470UF 20% 450V SNAP	292
SLP822M025A5P3 Cornell Dubilier Electronics	CAP ALUM 8200UF 20% 25V SNAP	0
MLS133M010EK0A Cornell Dubilier Electronics	CAP ALUM 13000UF 20% 10V FLATPCK	0
MLS152M060EK0C Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 60V FLATPACK	0
HVMLS332M060EB1A Cornell Dubilier Electronics	CAP ALUM 3300UF 20% 60V FLATPACK	0
SK4R7M063ST Cornell Dubilier Electronics	CAP ALUM 4.7UF 20% 63V RADIAL	1182
SK330M025ST Cornell Dubilier Electronics	CAP ALUM 33UF 20% 25V RADIAL	1192
380LX103M050K042 Cornell Dubilier Electronics	CAP ALUM 10000UF 20% 50V SNAP	0
381LX682M050A022 Cornell Dubilier Electronics	CAP ALUM 6800UF 20% 50V SNAP	12884
SLPX332M050A3P3 Cornell Dubilier Electronics	CAP ALUM 3300UF 20% 50V SNAP	51400

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.