Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T540B686K004BH85107280 KEMET	CAP TANT POLY 68UF 4V 1411	0
T540D477M004AH8510 KEMET	CAP TANT POLY 470UF 4V 2917	0
T521D157M016ATE040 KEMET	CAP TANT POLY 150UF 16V 2917	1095
M550B507M025AA KEMET	CAP TANT POLY 500UF 25V CHAS MNT	0
T540D227M006AH8605 KEMET	CAP TANT POLY 220UF 6.3V 2917	0
T541X107K030CT8520 KEMET	CAP TANT POLY 100UF 30V 2917	0
T550B406K030AH KEMET	CAP TANT POLY 40UF 30V AXIAL	0
T523W157M016APE0707280 KEMET	CAP TANT POLY 150UF 16V 2917	0
TCJB227M004R0060 Elco (AVX)	CAP TANT POLY 220UF 4V 1411	851
T550B687M008AH KEMET	CAP TANT POLY 680UF 8V AXIAL	0
M551B398M015AH KEMET	CAP TANT POLY 3900UF 15V CHAS MT	0
T520W686M010ATE025 KEMET	CAP TANT POLY 68UF 10V 2917	0
T540D337K2R5AH8705 KEMET	CAP TANT POLY 330UF 2.5V 2917	0
T541X477K010AT8510 KEMET	CAP TANT POLY 470UF 10V 2917	0
T555B406K030AH KEMET	CAP TANT POLY 40UF 30V SMD	0
TCJX476M016R0070E Elco (AVX)	CAP TANT POLY 47UF 16V 2917	0
T550B127K015AH4250 KEMET	CAP TANT POLY 120UF 15V AXIAL	0
T540D157M006DH8705 KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T541X476K030CH8510 KEMET	CAP TANT POLY 47UF 30V 2917	0
T540B157M003CH8610WAFL KEMET	CAP TANT POLY 150UF 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.