Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T520Y477M006ATE035 KEMET	CAP TANT POLY 470UF 6.3V 2917	302
T540D687K003DH86057280 KEMET	CAP TANT POLY 680UF 3V 2917	0
T540A226M010BH6510 KEMET	CAP TANT POLY 22UF 10V 1206	0
T540B157M003BH8610 KEMET	CAP TANT POLY 150UF 3V 1411	0
T540B226M010DH8610WAFL KEMET	CAP TANT POLY 22UF 10V 1411	0
T540D476K020BT8605 KEMET	CAP TANT POLY 47UF 20V 2917	0
T598V106M035AHE120 KEMET	CAP TANT POLY 10UF 35V 2917	0
T540B226K010DH86107280 KEMET	CAP TANT POLY 22UF 10V 1411	0
T541X476M035AH6510 KEMET	CAP TANT POLY 47UF 35V 2917	1200
T550B686M030AH KEMET	CAP TANT POLY 68UF 30V AXIAL	0
T541X337M016CT8520 KEMET	CAP TANT POLY 330UF 16V 2917	0
T520H108M006ATE055 KEMET	CAP TANT POLY 1000UF 6.3V 2924	1146
T541X107K030AH8510 KEMET	CAP TANT POLY 100UF 30V 2917	0
T540D157K010AH85107280 KEMET	CAP TANT POLY 150UF 10V 2917	0
T541X686K030AT8510 KEMET	CAP TANT POLY 68UF 30V 2917	0
T541X686K030BT8620 KEMET	CAP TANT POLY 68UF 30V 2917	0
T540B686M006AH85107610 KEMET	CAP TANT POLY 68UF 6.3V 1411	0
T540D687M003DH85057280 KEMET	CAP TANT POLY 680UF 3V 2917	0
T540D477M2R5CH86057610 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
T540B686K004DH86107610 KEMET	CAP TANT POLY 68UF 4V 1411	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.