Tantalum - Polymer Capacitors

Image	Part Number	Description / PDF	Quantity	Rfq
	T540D687K2R5BH85057280 KEMET	CAP TANT POLY 680UF 2.5V 2917	0
	T540B686M004BH8710WAFL KEMET	CAP TANT POLY 68UF 4V 1411	0
	T540D477K2R5DH8505 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
	T540D226M030DT8705 KEMET	CAP TANT POLY 22UF 30V 2917	0
	M550B108M040BT KEMET	CAP TANT POLY 1000UF 40V CHAS MT	0
	T551B397M015AT KEMET	CAP TANT POLY 390UF 15V AXIAL	0
	T550B147M006AH KEMET	CAP TANT POLY 140UF 6V AXIAL	0
	T540B336K006AH8610 KEMET	CAP TANT POLY 33UF 6.3V 1411	0
	M550B688M008AA KEMET	CAP TANT POLY 6800UF 8V CHAS MNT	0
	T540D687K003CH85057610 KEMET	CAP TANT POLY 680UF 3V 2917	0
	T540B107M004AH86107280 KEMET	CAP TANT POLY 100UF 4V 1411	0
	T555B256M050AH KEMET	CAP TANT POLY 25UF 50V SMD	0
	T540B686M004BH87107280 KEMET	CAP TANT POLY 68UF 4V 1411	0
	T541X107M030BT8510 KEMET	CAP TANT POLY 100UF 30V 2917	0
	T541X687M006AH8710 KEMET	CAP TANT POLY 680UF 6.3V 2917	0
	T540B157K003CH87107280 KEMET	CAP TANT POLY 150UF 3V 1411	0
	T541X157K016DH8710 KEMET	CAP TANT POLY 150UF 16V 2917	0
	T541X107K025AH8510 KEMET	CAP TANT POLY 100UF 25V 2917	0
	T540D337M2R5CH8605WAFL KEMET	CAP TANT POLY 330UF 2.5V 2917	0
	T541X108M2R5CT8705 KEMET	CAP TANT POLY 1000UF 2.5V 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.