Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T540D336K025CH8705 KEMET	CAP TANT POLY 33UF 25V 2917	0
T543D157K010AHW0257505 KEMET	CAP TANT POLY 150UF 10V 2917	0
T520D107M010AHE055 KEMET	CAP TANT POLY 100UF 10V 2917	0
T541X477K010CT8710 KEMET	CAP TANT POLY 470UF 10V 2917	0
T541X107K030DT8510 KEMET	CAP TANT POLY 100UF 30V 2917	0
T520B107M006ATE045 KEMET	CAP TANT POLY 100UF 6.3V 1411	1
T525D687M003ATE025 KEMET	CAP TANT POLY 680UF 3V 2917	488
T540D227M006DH85057610 KEMET	CAP TANT POLY 220UF 6.3V 2917	0
T540A226M010CT6710 KEMET	CAP TANT POLY 22UF 10V 1206	0
T550B107M060TH42510100 KEMET	CAP TANT POLY 100UF 60V AXIAL	0
T541X107K020BT8610 KEMET	CAP TANT POLY 100UF 20V 2917	0
T598B476M006AHE070 KEMET	CAP TANT POLY 47UF 6.3V 1411	0
T530X158M003AHE008 KEMET	CAP TANT POLY 1500UF 3V 2917	262
T550B256K050AH4251 KEMET	CAP TANT POLY 25UF 50V AXIAL	0
T540B226M010CH87107610 KEMET	CAP TANT POLY 22UF 10V 1411	0
T540B107K004CH8510WAFL KEMET	CAP TANT POLY 100UF 4V 1411	0
T541X477M010CH8710 KEMET	CAP TANT POLY 470UF 10V 2917	0
T520D227M004ATE065 KEMET	CAP TANT POLY 220UF 4V 2917	0
T540B107K003AH8510WAFL KEMET	CAP TANT POLY 100UF 3V 1411	0
M551B607M040AS KEMET	CAP TANT POLY 600UF 40V 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.