Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T543B106K025AHE100 KEMET	CAP TANT POLY 10UF 25V 1411	1398
M551B507K025AT KEMET	CAP TANT POLY 500UF 25V CHAS MNT	0
T525D477M004ATE040 KEMET	CAP TANT POLY 470UF 4V 2917	0
T520D107M010ATE080 KEMET	CAP TANT POLY 100UF 10V 2917	0
T520A226M006ATE100 KEMET	CAP TANT POLY 22UF 6.3V 1206	14213
T551B107M040AT4251 KEMET	CAP TANT POLY 100UF 40V AXIAL	0
T523W686M016APE070 KEMET	CAP TANT POLY 68UF 16V 2917	0
M550B348K008AH KEMET	CAP TANT POLY 3400UF 8V CHAS MNT	0
T540D477K2R5AH8705WAFL KEMET	CAP TANT POLY 470UF 2.5V 2917	0
T528Z337M2R5ATE006 KEMET	CAP TANT POLY 330UF 2.5V 2917	280
T550B107K060AT KEMET	CAP TANT POLY 100UF 60V AXIAL	0
T540D477M003DH8705 KEMET	CAP TANT POLY 470UF 3V 2917	0
T541X108M004DT8705 KEMET	CAP TANT POLY 1000UF 4V 2917	0
T540D477K004DH8510WAFL KEMET	CAP TANT POLY 470UF 4V 2917	0
T540D336M025DH8605 KEMET	CAP TANT POLY 33UF 25V 2917	0
T540A226M010AT6710 KEMET	CAP TANT POLY 22UF 10V 1206	0
T540D337K004DH85057280 KEMET	CAP TANT POLY 330UF 4V 2917	0
T540D336K025BH8605 KEMET	CAP TANT POLY 33UF 25V 2917	0
T541X476K035AT8510 KEMET	CAP TANT POLY 47UF 35V 2917	0
T540D156M0AT8510 KEMET	CAP TANT POLY 15UF 2917	0

Tantalum - Polymer Capacitors

1. Overview

Tantalum polymer capacitors are a type of electrolytic capacitor utilizing conductive polymer as the electrolyte and tantalum metal as the anode. Compared to traditional liquid-electrolyte tantalum capacitors, they offer lower equivalent series resistance (ESR), higher thermal stability, and longer operational lifespan. Their ability to deliver stable capacitance in compact packages makes them critical components in modern electronics for power management, noise filtering, and energy storage.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Solid Polymer Electrolyte	Ultra-low ESR (<10m ), high ripple current tolerance	High-frequency DC-DC converters
Hybrid Polymer-Electrolyte	Combines polymer and liquid electrolyte for cost-performance balance	Consumer electronics power supplies
High-Voltage Polymer	Rated voltage >25V with enhanced dielectric strength	Industrial motor drives

3. Structure and Composition

Typical construction includes:

Anode: Sintered tantalum pellet with porous structure
Dielectric: Thin Ta₂O₅ layer formed via anodization
Electrolyte: Conductive polymer (e.g., PEDOT:PSS) coating
Cathode: Graphite/silver layered termination

The porous anode structure maximizes surface area while the polymer electrolyte provides solid-state reliability.

4. Key Technical Specifications

Parameter	Significance
Capacitance Range: 10 F - 1000 F	Determines energy storage capacity
Rated Voltage: 2.5V - 50V	Defines maximum operational voltage
ESR: <20m typical	Impacts power efficiency and thermal performance
Leakage Current: <0.01C*V	Affects battery-powered device standby consumption
Operating Temperature: -55 C to +125 C	Ensures reliability in harsh environments

5. Application Fields

Consumer Electronics: Smartphone power management modules
Automotive: Engine control units (ECUs) and ADAS systems
Industrial: Programmable logic controllers (PLCs)
Medical: Portable diagnostic equipment power filtering
Telecom: 5G base station RF amplifiers

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Features
Vishay	T55 Series	2000 hours life at 105 C
AVX	TACMIC	Military-grade vibration resistance
KEMET	A700 Series	Automotive AEC-Q200 qualified

7. Selection Guidelines

Key considerations:

Capacitance-voltage (CV) product must exceed circuit requirements by 20%
ESR requirements for high-frequency noise suppression
Package size constraints (e.g., 3216 vs 7343)
Temperature derating: Reduce rated voltage by 30% at 125 C
Failure mode analysis for safety-critical applications

8. Industry Trends

Emerging developments include:

Nano-structured polymer electrolytes enabling 30% higher capacitance density
Low-flammability materials for EV battery management systems
Embedded capacitor technology for 5G RF modules
AI-driven accelerated life testing methods

Market demand is projected to grow at 6.2% CAGR through 2030, driven by automotive electrification and IoT device proliferation.