Aluminum - Polymer Capacitors

Part Number	Description / PDF	Quantity
ECASD40J157M015K00 TOKO / Murata	CAP ALUM POLY 150UF 20% 6.3V SMD	2716
ECASD60J227M010K00 TOKO / Murata	CAP ALUM POLY 220UF 20% 6.3V SMD	0
ECASD41A476M025K00 TOKO / Murata	POLYMER AL CAP 7343 47UF 10V 20%	0
ECASD40D227M009K00 TOKO / Murata	CAP ALUM POLY 220UF 20% 2V SMD	3617
ECASD31C476M040KA0 TOKO / Murata	CAP ALUM POLY 47UF 20% 16V SMD	2672
ECASD41E226M040KA0 TOKO / Murata	CAP ALUM POLY 22UF 20% 25V SMD	23910
ECASD40G107M016K00 TOKO / Murata	CAP ALUM POLY 100UF 20% 4V SMD	3000
ECASD60D477M006K00 TOKO / Murata	CAP ALUM POLY 470UF 20% 2V SMD	555
ECASD41C336M040KA0 TOKO / Murata	CAP ALUM POLY 33UF 20% 16V SMD	1499
ECASD91A157M010K00 TOKO / Murata	CAP ALUM POLY 150UF 20% 10V SMD	6048
ECASD41E106M040KA0 TOKO / Murata	CAP ALUM POLY 10UF 20% 25V SMD	1974
ECASD41C476M040KA0 TOKO / Murata	CAP ALUM POLY	0
ECASD41C106M060K00 TOKO / Murata	CAP ALUM POLY 10UF 20% 16V SMD	9483
ECASD41A336M025K00 TOKO / Murata	CAP ALUM POLY 33UF 20% 10V SMD	1727
ECASD40G227M009K00 TOKO / Murata	CAP ALUM POLY 220UF 20% 4V SMD	0
ECASD41A106M055K00 TOKO / Murata	CAP ALUM POLY 10UF 20% 10V SMD	2238
ECASD91A107M010K00 TOKO / Murata	CAP ALUM POLY 100UF 20% 10V SMD	0
ECASD90G337M008K00 TOKO / Murata	CAP ALUM POLY 330UF 20% 4V SMD	2172
ECASD41E336M040KA0 TOKO / Murata	CAP ALUM POLY 33UF 20% 25V SMD	9593
ECASD90J337M009K00 TOKO / Murata	CAP ALUM POLY 330UF 20% 6.3V SMD	3

Aluminum - Polymer Capacitors

1. Overview

Aluminum polymer capacitors are a type of electrolytic capacitor utilizing conductive polymer materials as the cathode. Compared to traditional liquid electrolyte capacitors, they offer lower equivalent series resistance (ESR), longer operational lifespan, and improved stability. Their hybrid structure combining aluminum oxide dielectric and polymer electrolytes makes them critical components in modern electronics for power filtering, signal decoupling, and energy storage applications.

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
SMD Aluminum Polymer Capacitors	Surface-mount design with compact size and low profile	Smartphones, laptops, VR devices
Leaded Aluminum Polymer Capacitors	Radial/axial leads with high current handling capability	Power supplies, industrial inverters
High Voltage Polymer Capacitors	Rated voltage 100V with reinforced dielectric layers	Automotive ECUs, solar inverters
Low ESR Polymer Capacitors	ESR values < 10m for high-frequency filtering	Server motherboards, GPU power modules

3. Structure & Composition

The typical construction includes:

Anode: High-purity aluminum foil with etched surface for increased area
Dielectric: Thin aluminum oxide layer (Al O ) formed through electrochemical oxidation
Cathode: Conductive polymer (e.g., PEDOT:PSS) combined with graphite/carbon layer
Electrolyte: Solid polymer matrix with high ion conductivity
Encapsulation: Aluminum casing with rubber sealing for moisture protection

4. Key Technical Specifications

Parameter	Description	Importance
Capacitance Range	Typically 10 F to 3300 F	Determines energy storage capacity
Rated Voltage	2.5V to 100V DC	Defines maximum operating voltage
ESR (Equivalent Series Resistance)	3m to 150m	Affects high-frequency filtering efficiency
Ripple Current	100mA to 5Arms	Crucial for power supply stability
Operating Temperature	-55 C to +105 C	Determines environmental durability
Lifetime	5000 to 15000 hours @ 105 C	Impacts product reliability

5. Application Fields

Consumer Electronics: Smartphones, gaming consoles, wearables
Automotive Systems: ADAS controllers, battery management systems
Industrial Equipment: CNC machines, servo drives, PLCs
Telecom Infrastructure: 5G base stations, optical network terminals
Medical Devices: MRI scanners, portable diagnostic equipment

6. Leading Manufacturers & Products

Manufacturer	Product Series	Key Features
Nichicon	UPW Series	105 C, 3000hrs, ultra-low ESR (5m )
Chemicon	SP-Cap	High ripple current: 2.5A@100kHz
Panasonic	FC-F Series	Conductive polymer hybrid technology
AVX	TACMicro	Military-grade reliability (MIL-STD-883)
Samsung Electro-Mechanics	CA Series	0805 case size with 220 F capacitance

7. Selection Guidelines

Key considerations:

Capacitance & Voltage Margin: Select 20% higher than circuit requirements
ESR Requirements: Critical for switching power supplies (e.g., VRMs require <20m )
Thermal Management: Derate ripple current at temperatures >85 C
Package Constraints: SMD preferred for mobile devices, through-hole for high-current applications
Cost Optimization: Balance polymer content vs. performance needs

Case Study: Selecting a 470 F/16V capacitor for a GPU power circuit requires ESR <15m and 105 C rating.

8. Industry Trends

Development of nanocomposite polymers for ESR reduction to sub-5m levels
Miniturization: 0603 SMD case achieving 100 F+ capacitance
High-temperature tolerance: 125 C operational capability
Biodegradable polymer electrolytes for eco-friendly manufacturing
Embedded capacitor technology for 3D IC packaging
AI-driven lifetime prediction models for reliability optimization