Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
VUJ102M1ETR-1621S SURGE	CAP ALUM 1000UF 20% 25V SMD	500
RZW222M1VBK-1632S SURGE	CAP ALUM 2200UF 20% 35V RADIAL	500
VE-471M1ETR-1010S SURGE	CAP ALUM 470UF 20% 25V SMD	500
RZW102M1VBK-1816S SURGE	CAP ALUM 1000UF 20% 35V RADIAL	450
RJA101M1VBK-0611S SURGE	CAP ALUM 100UF 20% 35V RADIAL	1000
VZU331M1VTR-0810S SURGE	CAP ALUM 330UF 20% 35V SMD	500
RUA221M1VBK-1325S SURGE	CAP ALUM 220UF 20% 35V RADIAL	500
VZH221M1VTR-0810CS SURGE	CAP ALUM 220UF 20% 35V SMD	500
RXW100M1CBK-0511S SURGE	CAP ALUM 10UF 20% 16V RADIAL	994
VZH222M1CTR-1616S SURGE	CAP ALUM 2200UF 20% 16V SMD	400
RXW222M1VBK-1825S SURGE	CAP ALUM 2200UF 20% 35V RADIAL	500
VZH101M1VTR-0810ES SURGE	CAP ALUM 100UF 20% 35V SMD	500
RXW4R7M1HBK-0511S SURGE	CAP ALUM 4.7UF 20% 50V RADIAL	995
RXK471M1CBK-1016S SURGE	CAP ALUM 470UF 20% 16V RADIAL	500
RJA100M1HBK-0511S SURGE	CAP ALUM 10UF 20% 50V RADIAL	965
VUJ221M1VTR-1313S SURGE	CAP ALUM 220UF 20% 35V SMD	400
VZH101M1HTR-1010S SURGE	CAP ALUM 100UF 20% 50V SMD	500
VZU102M1CTR-1010S SURGE	CAP ALUM 1000UF 20% 16V SMD	500
RXW222M1HBK-1836S SURGE	CAP ALUM 2200UF 20% 50V RADIAL	490
RXW101M1VBK-0811S SURGE	CAP ALUM 100UF 20% 35V RADIAL	1000

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.