Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
AVS227M25G24T-F Cornell Dubilier Electronics	CAP ALUM 220UF 20% 25V SMD	0
106SML016M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 16V SMD	0
WBR8-450A Cornell Dubilier Electronics	CAP ALUM 8UF 450V AXIAL	0
106CKH050M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 50V THRU HOLE	13
107AXZ050M Cornell Dubilier Electronics	CAP ALUM 100UF 20% 50V SMD	4231
CGS114U025X5L Cornell Dubilier Electronics	CAP ALUM 110000UF 25V SCREW	0
HES562G350X5L Cornell Dubilier Electronics	CAP ALUM 5600UF 350V SCREW	0
AHA226M63E16T-F Cornell Dubilier Electronics	CAP ALUM 22UF 20% 63V SMD	0
MLP771M150EA0D Cornell Dubilier Electronics	CAP ALUM 770UF 20% 150V FLATPACK	0
381LX221M315K012 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 315V SNAP	0
CGS182T300R5L Cornell Dubilier Electronics	CAP ALUM 1800UF 300V SCREW	0
228LBB050M2BC Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 50V SNAP	0
ATB225M050 Cornell Dubilier Electronics	CAP ALUM 2.2UF 20% 50V SMD	0
AFK106M50C12T-F Cornell Dubilier Electronics	CAP ALUM 10UF 20% 50V SMD	37973000
106SMH035M Cornell Dubilier Electronics	CAP ALUM 10UF 20% 35V SMD	0
SLP271M315A4P3 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 315V SNAP	0
AEB106M2GP44T-F Cornell Dubilier Electronics	CAP ALUM 10UF 20% 400V SMD	0
SLP271M350A9P3 Cornell Dubilier Electronics	CAP ALUM 270UF 20% 350V SNAP	0
SLP123M035C9P3 Cornell Dubilier Electronics	CAP ALUM 12000UF 20% 35V SNAP	0
NLW250-16 Cornell Dubilier Electronics	CAP ALUM 250UF 16V AXIAL	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.