Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T540D476K020CH8705 KEMET	CAP TANT POLY 47UF 20V 2917	0
T550B756K075TH0100 KEMET	CAP TANT POLY 75UF 75V AXIAL	0
T551B227M008AT KEMET	CAP TANT POLY 220UF 8V AXIAL	0
T540D477M2R5BH85057610 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
T591D106M050ATE090 KEMET	CAP TANT POLY 10UF 50V 2917	420
T550B107M060TH KEMET	CAP TANT POLY 100UF 60V AXIAL	0
T540B336M010DH86107280 KEMET	CAP TANT POLY 33UF 10V 1411	0
T540D687M2R5BH8505WAFL KEMET	CAP TANT POLY 680UF 2.5V 2917	0
T540D687K2R5AH87057280 KEMET	CAP TANT POLY 680UF 2.5V 2917	0
M550B108K040BS KEMET	CAP TANT POLY 1000UF 40V CHAS MT	0
T540D687M003AH87057280 KEMET	CAP TANT POLY 680UF 3V 2917	0
T530X687M004ATE005 KEMET	CAP TANT POLY 680UF 4V 2917	0
M550B418M006AS KEMET	CAP TANT POLY 4100UF 6V CHAS MNT	0
T540D227M006BH85057280 KEMET	CAP TANT POLY 220UF 6.3V 2917	0
T541X337M016BH8610 KEMET	CAP TANT POLY 330UF 16V 2917	0
T540D226M0AT8605 KEMET	CAP TANT POLY 22UF 2917	0
T550B756K075AT42510100 KEMET	CAP TANT POLY 75UF 75V AXIAL	0
T521V686M016ATE0407280 KEMET	CAP TANT POLY 68UF 16V 2917	0
M550B108M025TA KEMET	CAP TANT POLY 1000UF 25V CHAS MT	0
T540D337M006AH8710WAFL KEMET	CAP TANT POLY 330UF 6.3V 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.