Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T521D565M050ATE090 KEMET	CAP TANT POLY 5.6UF 50V 2917	2494
T540D227M004BH85057610 KEMET	CAP TANT POLY 220UF 4V 2917	0
T540D337M003CH8505 KEMET	CAP TANT POLY 330UF 3V 2917	0
T540B107K004DH8710 KEMET	CAP TANT POLY 100UF 4V 1411	0
T550B687K008AT KEMET	CAP TANT POLY 680UF 8V AXIAL	0
T540D336M0CT8505 KEMET	CAP TANT POLY 33UF 2917	0
T527I476M010ATE200 KEMET	CAP TANT POLY 47UF 10V 1206	0
T550B827M006AH KEMET	CAP TANT POLY 820UF 6V AXIAL	0
T540B336M010CH8610WAFL KEMET	CAP TANT POLY 33UF 10V 1411	0
T540D157K006DH8605WAFL KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T550B756K075AT0100 KEMET	CAP TANT POLY 75UF 75V AXIAL	0
T521D476M016ATE040 KEMET	CAP TANT POLY 47UF 16V 2917	514
T540D337M004DH8705 KEMET	CAP TANT POLY 330UF 4V 2917	0
T540B107M003AH8710 KEMET	CAP TANT POLY 100UF 3V 1411	0
T540B107M003CH8610WAFL KEMET	CAP TANT POLY 100UF 3V 1411	0
T540D157M006CH86057610 KEMET	CAP TANT POLY 150UF 6.3V 2917	0
M551B688K008AS KEMET	CAP TANT POLY 6800UF 8V CHAS MNT	0
T540B686M004DH85107610 KEMET	CAP TANT POLY 68UF 4V 1411	0
T540D336M020BH8705 KEMET	CAP TANT POLY 33UF 20V 2917	0
T520Y227M010ATE0407280 KEMET	CAP TANT POLY 220UF 10V 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.