Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T551B397K015AT4251 KEMET	CAP TANT POLY 390UF 15V AXIAL	0
4TCF330ML Panasonic	CAP TANT POLY 330UF 4V 2917	2148
T540D157M006AH85057280 KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T550B406M030AH4251 KEMET	CAP TANT POLY 40UF 30V AXIAL	0
T540D226M020DH8505 KEMET	CAP TANT POLY 22UF 20V 2917	0
T591D227M010ATE025 KEMET	CAP TANT POLY 220UF 10V 2917	8
TCJT476M006R0070E Elco (AVX)	CAP TANT POLY 47UF 6.3V 1411	0
T540B336K006CH8510 KEMET	CAP TANT POLY 33UF 6.3V 1411	0
T541X337M016CH8520 KEMET	CAP TANT POLY 330UF 16V 2917	0
T540D336K020AT8605 KEMET	CAP TANT POLY 33UF 20V 2917	0
TCJB226M020R0090E Elco (AVX)	CAP TANT POLY 22UF 20V 1411	3959
M550B688M008AT KEMET	CAP TANT POLY 6800UF 8V CHAS MNT	0
T598B336M010AHS080 KEMET	CAP TANT POLY 33UF 10V 1411	0
T540B686K006CH8510WAFL KEMET	CAP TANT POLY 68UF 6.3V 1411	0
T521V476M020ATE080 KEMET	CAP TANT POLY 47UF 20V 2917	0
T541X157M016BH8610 KEMET	CAP TANT POLY 150UF 16V 2917	0
M550B257M100BS KEMET	CAP TANT POLY 250UF 100V CHAS MT	0
M550B507M040AT KEMET	CAP TANT POLY 500UF 40V CHAS MNT	0
T550B227K008AH4250 KEMET	CAP TANT POLY 220UF 8V AXIAL	0
T521V686M016ATE090 KEMET	CAP TANT POLY 68UF 16V 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.