Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
NEH47M35CB NTE Electronics, Inc.	CAP ALUM 47UF 20% 35V AXIAL	676
VHT68M350 NTE Electronics, Inc.	CAP ALUM 68UF 20% 350V RADIAL	676
NEV.47M100AA NTE Electronics, Inc.	CAP ALUM 0.47UF 20% 100V RADIAL	102
VHT15000M6.3 NTE Electronics, Inc.	CAP-15000UF 6.3V 105*C RA	668
VHT10M350 NTE Electronics, Inc.	CAP ALUM 10UF 20% 350V RADIAL	508
VHT680M25 NTE Electronics, Inc.	CAP ALUM 680UF 20% 25V RADIAL	1728
NEV680M50FF NTE Electronics, Inc.	CAP ALUM 680UF 20% 50V RADIAL	184
NEH2200M63HB NTE Electronics, Inc.	CAP ALUM 2200UF 20% 63V AXIAL	344
MSC125V53 NTE Electronics, Inc.	CAP ALUM 53UF 125V QC TERM	11
MSC250V708 NTE Electronics, Inc.	CAP ALUM 708UF 250V RADIAL CAN	199
VHT3.3M63 NTE Electronics, Inc.	CAP ALUM 3.3UF 20% 63V RADIAL	357
VHT3.3M50 NTE Electronics, Inc.	CAP ALUM 3.3UF 20% 50V RADIAL	609
VHT1M250 NTE Electronics, Inc.	CAP ALUM 1UF 20% 250V RADIAL	379
ULM22M35 NTE Electronics, Inc.	CAP ALUM 22UF 20% 35V RADIAL	2230
NPR10M16 NTE Electronics, Inc.	CAP ALUM 10UF 20% 16V RADIAL	129
NEH2200M16FE NTE Electronics, Inc.	CAP ALUM 2200UF 20% 16V AXIAL	1
NPA100M16 NTE Electronics, Inc.	CAP ALUM 100UF 20% 16V AXIAL	783
MSC250V130 NTE Electronics, Inc.	CAP ALUM 130UF 250V QC TERM	13
NPA47M100 NTE Electronics, Inc.	CAP ALUM 47UF 20% 100V AXIAL	659
MSC250V108 NTE Electronics, Inc.	CAP ALUM 108UF 250V QC TERM	30

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.