Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T520T156M006ATE100 KEMET	CAP TANT POLY 15UF 6.3V 1411	2753
T555B107K050AH KEMET	CAP TANT POLY 100UF 50V SMD	0
T550B827M006AH4251 KEMET	CAP TANT POLY 820UF 6V AXIAL	0
T555B187K010AH KEMET	CAP TANT POLY 180UF 10V SMD	0
T520B336M010AHE040 KEMET	CAP TANT POLY 33UF 10V 1411	0
T540D336M0BT8605 KEMET	CAP TANT POLY 33UF 2917	0
T520V107M006ATE007 KEMET	CAP TANT POLY 100UF 6.3V 2917	0
T551B127K015AT4251 KEMET	CAP TANT POLY 120UF 15V AXIAL	0
T540B157M003AH8510 KEMET	CAP TANT POLY 150UF 3V 1411	0
T598B476M010ATE070 KEMET	CAP TANT POLY 47UF 10V 1411	0
T540B107K004AH85107280 KEMET	CAP TANT POLY 100UF 4V 1411	0
T541X337M016BT8710 KEMET	CAP TANT POLY 330UF 16V 2917	0
T550B756M075TH KEMET	CAP TANT POLY 75UF 75V AXIAL	0
T540B226K010CH86107280 KEMET	CAP TANT POLY 22UF 10V 1411	0
T530D567M2R5ATE005 KEMET	CAP TANT POLY 560UF 2.5V 2917	384
T540D157M006CH8505WAFL KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T598B686M006ATE0707280 KEMET	CAP TANT POLY 68UF 6.3V 1411	0
T550B397K015AH4251 KEMET	CAP TANT POLY 390UF 15V AXIAL	0
T598B157M006AHS070 KEMET	CAP TANT POLY 150UF 6.3V 1411	0
T540B476M006CH8610WAFL KEMET	CAP TANT POLY 47UF 6.3V 1411	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.