Tantalum - Polymer Capacitors

Image	Part Number	Description / PDF	Quantity	Rfq
	T550B127M015AT KEMET	CAP TANT POLY 120UF 15V AXIAL	0
	M550B507K050AS KEMET	CAP TANT POLY 500UF 50V CHAS MNT	0
	T591D157M010ATE025 KEMET	CAP TANT POLY 150UF 10V 2917	0
	T540D227K006BH8505 KEMET	CAP TANT POLY 220UF 6.3V 2917	0
	T520V337M2R5ATE009 KEMET	CAP TANT POLY 330UF 2.5V 2917	0
	T540B107M003CH8710 KEMET	CAP TANT POLY 100UF 3V 1411	0
	T540D226M030DT8505 KEMET	CAP TANT POLY 22UF 30V 2917	0
	T540B686M006AH86107610 KEMET	CAP TANT POLY 68UF 6.3V 1411	0
	T529P476M006AAE200 KEMET	CAP TANT POLY 47UF 6.3V 0805	0
	T541X158K2R5BT8505 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
	M550B348K008AG KEMET	CAP TANT POLY 3400UF 8V CHAS MNT	0
	T541X108K004CH8605 KEMET	CAP TANT POLY 1000UF 4V 2917	0
	T540D227K006BH8605WAFL KEMET	CAP TANT POLY 220UF 6.3V 2917	0
	T540B686K004CH8510WAFL KEMET	CAP TANT POLY 68UF 4V 1411	0
	T550B756K075TH KEMET	CAP TANT POLY 75UF 75V AXIAL	0
	T520B476M010ATE035 KEMET	CAP TANT POLY 47UF 10V 1411	0
	T520B107M004ATE040 KEMET	CAP TANT POLY 100UF 4V 1411	0
	M550B257M100BG KEMET	CAP TANT POLY 250UF 100V CHAS MT	0
	T556B107K025AH KEMET	CAP TANT POLY 100UF 25V SMD	0
	M550B507M025AT KEMET	CAP TANT POLY 500UF 25V 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.