Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
M550B228M010AH KEMET	CAP TANT POLY 2200UF 10V CHAS MT	0
T543D685M063ATE075 KEMET	CAP TANT POLY 6.8UF 63V 2917	0
T540D227K004AH8705 KEMET	CAP TANT POLY 220UF 4V 2917	0
T541X686K030DT8610 KEMET	CAP TANT POLY 68UF 30V 2917	0
T550B256K100BH42510100 KEMET	CAP TANT POLY 25UF 100V AXIAL	0
T520V157M010ATE025 KEMET	CAP TANT POLY 150UF 10V 2917	526
TCJB155M050R0300E Elco (AVX)	CAP TANT POLY 1.5UF 50V 1411	2000
T540D477M004CH8610 KEMET	CAP TANT POLY 470UF 4V 2917	0
T543D685M063ATE0757280 KEMET	CAP TANT POLY 6.8UF 63V 2917	0
T520T476M006ATE070 KEMET	CAP TANT POLY 47UF 6.3V 1411	8744
T540D336K020AH8705 KEMET	CAP TANT POLY 33UF 20V 2917	0
6TCE330MIL Panasonic	CAP TANT POLY 330UF 6.3V 2917	2497
T541X107M030BH6510 KEMET	CAP TANT POLY 100UF 30V 2917	0
M550B108M040BS KEMET	CAP TANT POLY 1000UF 40V CHAS MT	0
T541X477K006CT8505 KEMET	CAP TANT POLY 470UF 6.3V 2917	0
TCJN106M006R0500 Elco (AVX)	CAP TANT POLY 10UF 6.3V 0805	5114
T540D227M004DH86057610 KEMET	CAP TANT POLY 220UF 4V 2917	0
T598B225M050AHE200 KEMET	CAP TANT POLY 2.2UF 50V 1411	0
T541X476K030AT8610 KEMET	CAP TANT POLY 47UF 30V 2917	0
4TPF330ML Panasonic	CAP TANT POLY 330UF 4V 2917	3290

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.