Aluminum Electrolytic Capacitors

Part Number	Description / PDF	Quantity
381LX820M400J012 Cornell Dubilier Electronics	CAP ALUM 82UF 400V 20% SNAP	0
381LQ152M160K452 Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 160V SNAP	0
381LQ221M400J032 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 400V SNAP	622
HVMLS331M250EA1A Cornell Dubilier Electronics	CAP ALUM 330UF 20% 250V FLATPACK	0
CGS141T450R3C Cornell Dubilier Electronics	CAP ALUM 140UF 450V SCREW	364
SLP391M315H3P3 Cornell Dubilier Electronics	CAP ALUM 390UF 20% 315V SNAP	0
228CKS050M Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 50V T/H	69743200
CGS332T350X5L Cornell Dubilier Electronics	CAP ALUM 3300UF 350V SCREW	1
THAS322M050AD1C Cornell Dubilier Electronics	THINPACK CAP ALUM 3200 50V	0
SLPX221M220A1P3 Cornell Dubilier Electronics	CAP ALUM 220UF 20% 220V SNAP	0
229LMB016M2ED Cornell Dubilier Electronics	CAP ALUM 22000UF 20% 16V SNAP	0
MLP112M100EK1D Cornell Dubilier Electronics	CAP ALUM 1100UF 20% 100V FLATPCK	0
158CKS010M Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 10V T/H	21600
381LX152M180A032 Cornell Dubilier Electronics	CAP ALUM 1500UF 20% 180V SNAP	0
HVMLS173M020EB1A Cornell Dubilier Electronics	CAP ALUM 17000UF 20% 20V FLATPCK	0
SLP181M385A4P3 Cornell Dubilier Electronics	CAP ALUM 180UF 20% 385V SNAP	0
336BPS100M Cornell Dubilier Electronics	CAP ALUM 33UF 20% 100V RADIAL	0
CGS192T500X3L Cornell Dubilier Electronics	CAP ALUM 1900UF 500V SCREW	0
228CKS6R3M Cornell Dubilier Electronics	CAP ALUM 2200UF 20% 6.3V T/H	0
550C372T450DF2B Cornell Dubilier Electronics	CAP ALUM 3700UF 450V SCREW	16

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.