Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
NEV33M63CB NTE Electronics, Inc.	CAP ALUM 33UF 20% 63V RADIAL	1268
NPA330M63 NTE Electronics, Inc.	CAP-330MF 63V AXIAL	642
VHT4.7M35 NTE Electronics, Inc.	CAP ALUM 4.7UF 20% 35V RADIAL	484
NEH.33M100AA NTE Electronics, Inc.	CAP ALUM 0.33UF 20% 100V AXIAL	605
VHT10M250 NTE Electronics, Inc.	CAP ALUM 10UF 20% 250V RADIAL	407
NEH.47M100AA NTE Electronics, Inc.	CAP ALUM 0.47UF 20% 100V AXIAL	123
NEV220M16DC NTE Electronics, Inc.	CAP ALUM 220UF 20% 16V RADIAL	2999
MSC125V25 NTE Electronics, Inc.	CAP ALUM 25UF 125V QC TERM	28
MSC125V590 NTE Electronics, Inc.	CAP ALUM 590UF 125V QC TERM	0
VHT10M160 NTE Electronics, Inc.	CAP ALUM 10UF 20% 160V RADIAL	100
NEV470M10DD NTE Electronics, Inc.	CAP ALUM 470UF 20% 10V RADIAL	644
NEHH22M350EE NTE Electronics, Inc.	CAP ALUM 22UF 350V AXIAL	116
VHT1000M100 NTE Electronics, Inc.	CAP ALUM 1000UF 20% 100V RADIAL	629
VHT6.8M100 NTE Electronics, Inc.	CAP ALUM 6.8UF 20% 100V RADIAL	696
NEH220M16CB NTE Electronics, Inc.	CAP ALUM 220UF 20% 16V AXIAL	409
NEH3300M35GF NTE Electronics, Inc.	CAP ALUM 3300UF 20% 35V AXIAL	715
NPR330M50 NTE Electronics, Inc.	CAP ALUM 330UF 20% 50V RADIAL	539
NEHH3.3M450CD NTE Electronics, Inc.	CAP ALUM 3.3UF 450V AXIAL	700
NPA33M50 NTE Electronics, Inc.	CAP ALUM 33UF 20% 50V AXIAL	51
VHT68M63 NTE Electronics, Inc.	CAP ALUM 68UF 20% 63V RADIAL	474

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.