Aluminum - Polymer Capacitors

Part Number	Description / PDF	Quantity
A768MS127M1HLAV024 KEMET	CAP ALUM POLY 120UF 20% 50V SMD	250
A768KE187M1ELAS029 KEMET	CAP ALUM POLY 180UF 20% 25V SMD	1000
A768EB186M1HLAE048 KEMET	CAP ALUM POLY 18UF 20% 50V SMD	1789
A798D477M2R5ATE009 KEMET	AO CAP ALUMINUM POLYMER HARSH EN	1500
A700X477M002ATE015 KEMET	CAP ALUM POLY 470UF 20% 2V SMD	309
A755KS476M1EAAE025 KEMET	CAP ALUM POLY 47UF 20% 25V T/HL	2032
A758KK128M0EAAE014 KEMET	CAP ALUM POLY 1200UF 2.5V T/H	633
A759KS827M1AAAE013 KEMET	CAP ALUM POLY 820UF 20% 10V TH	1000
A758EK277M0JAAE018 KEMET	CAP ALUM POLY 270UF 20% 6.3V T/H	990
A750EK476M1EAAE040 KEMET	CAP ALUM POLY 47UF 20% 25V T/H	1
A700X157M010ATE010 KEMET	CAP ALUM POLY 150UF 20% 10V SMD	24376
A766KE397M0JLAE022 KEMET	CAP ALUM POLY 390UF 20% 6.3V SMD	1475
A767KN336M1VLAE031 KEMET	CAP ALUM POLY 33UF 20% 35V SMD	500
A750KR158M0EAAE007 KEMET	POLYMER ALUMINUM, RADIAL, 1,500	0
A768EB336M1GLAE045 KEMET	CAP ALUM POLY 33UF 20% 40V SMD	1999
A765KN108M0ELAE012 KEMET	CAP ALUM POLY 1000UF 2.5V SMD	480
A700W227M2R5ATE009 KEMET	CAP ALUM POLY 220UF 20% 2.5V SMD	6000
A759BQ336M1VAAE075 KEMET	CAP ALUM POLY 33UF 20% 35V T/H	975
A768KE187M1ELAE029 KEMET	CAP ALUM POLY 180UF 20% 25V SMD	995
A750KS827M1AAAE014 KEMET	CAP ALUM POLY 820UF 20% 10V T/H	500

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