Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T540B107K004BH8710WAFL KEMET	CAP TANT POLY 100UF 4V 1411	0
T540D477K003CH87057280 KEMET	CAP TANT POLY 470UF 3V 2917	0
T598B476M006AHS070 KEMET	CAP TANT POLY 47UF 6.3V 1411	0
T520T476M006ATE040 KEMET	CAP TANT POLY 47UF 6.3V 1411	3951
T540D226M0BT8705 KEMET	CAP TANT POLY 22UF 2917	0
T543D107K016AHW050D100 KEMET	CAP TANT POLY 100UF 16V 2917	0
T543D685M063AHE075 KEMET	CAP TANT POLY 6.8UF 63V 2917	0
T522V157M006ATE025 KEMET	CAP TANT POLY 150UF 6.3V 2917	471
T540B107M003BH87107280 KEMET	CAP TANT POLY 100UF 3V 1411	0
TCJB106M035R0200E Elco (AVX)	CAP TANT POLY 10UF 35V 1411	14670
T540B686K006BH8610WAFL KEMET	CAP TANT POLY 68UF 6.3V 1411	0
T550B756K075BH0100 KEMET	CAP TANT POLY 75UF 75V AXIAL	0
M550B687M030AA KEMET	CAP TANT POLY 680UF 30V CHAS MNT	0
TCNT157M006R0200E Elco (AVX)	CAP TANT POLY 150UF 6.3V 1411	4000
T541X108K003DH8605 KEMET	CAP TANT POLY 1000UF 3V 2917	0
TCJB336M006R0070E Elco (AVX)	CAP TANT POLY 33UF 6.3V 1411	0
T541X107K020BH8610 KEMET	CAP TANT POLY 100UF 20V 2917	0
T540D336M020BT8705 KEMET	CAP TANT POLY 33UF 20V 2917	0
T550B686K030AH KEMET	CAP TANT POLY 68UF 30V AXIAL	0
M551B348M008AH KEMET	CAP TANT POLY 3400UF 8V CHAS MNT	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.