Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
MSC125V189 NTE Electronics, Inc.	CAP ALUM 189UF 125V QC TERM	68
VHT820M50 NTE Electronics, Inc.	CAP ALUM 820UF 20% 50V RADIAL	547
NEH470M50EE NTE Electronics, Inc.	CAP ALUM 470UF 20% 50V AXIAL	443
VHT1000M6.3 NTE Electronics, Inc.	CAP ALUM 1000UF 20% 6.3V RADIAL	411
NEH1000M6.3DC NTE Electronics, Inc.	CAP ALUM 1000UF 20% 6.3V AXIAL	801
NEVH100M250II NTE Electronics, Inc.	CAP ALUM 100UF 250V RADIAL	516
ULM220M6.3 NTE Electronics, Inc.	CAP ALUM 220UF 20% 6.3V RADIAL	2364
NEV330M35EE NTE Electronics, Inc.	CAP ALUM 330UF 20% 35V RADIAL	748
MSC330V340 NTE Electronics, Inc.	CAP ALUM 340UF 330V RADIAL CAN	10
NPA33M25 NTE Electronics, Inc.	CAP ALUM 33UF 20% 25V AXIAL	684
VHT330M100 NTE Electronics, Inc.	CAP ALUM 330UF 20% 100V RADIAL	714
NEH.47M50AA NTE Electronics, Inc.	CAP ALUM 0.47UF 20% 50V AXIAL	36
NEH22M63CB NTE Electronics, Inc.	CAP ALUM 22UF 20% 63V AXIAL	344
MSC125V1800 NTE Electronics, Inc.	CAP ALUM 1800UF 125V RADIAL CAN	20
NEVH330M160HA NTE Electronics, Inc.	CAP ALUM 330UF 160V RADIAL	365
NEV3300M50HA NTE Electronics, Inc.	CAP ALUM 3300UF 20% 50V RADIAL	56
NPR47M16 NTE Electronics, Inc.	CAP ALUM 47UF 20% 16V RADIAL	1114
NPR220M25 NTE Electronics, Inc.	CAP ALUM 220UF 20% 25V RADIAL	1040
NPA220M63 NTE Electronics, Inc.	CAP ALUM 220UF 20% 63V AXIAL	1435
MSC250V30 NTE Electronics, Inc.	CAP ALUM 30UF 250V QC TERM	40

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.