Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T540D226M0CT8605 KEMET	CAP TANT POLY 22UF 2917	0
T540D336M030DT8710 KEMET	CAP TANT POLY 33UF 30V 2917	0
T540D227K004AH86057610 KEMET	CAP TANT POLY 220UF 4V 2917	0
T541X337M016BT8720 KEMET	CAP TANT POLY 330UF 16V 2917	0
T540D157M006AH86057280 KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T520D337M006ATE0257280 KEMET	CAP TANT POLY 330UF 6.3V 2917	0
T520T107M004ATE070 KEMET	CAP TANT POLY 100UF 4V 1411	2766
T520X337M010ATE010 KEMET	CAP TANT POLY 330UF 10V 2917	2499
T543X158M003AHE008 KEMET	CAP TANT POLY 1500UF 3V 2917	0
M551B507M060AS KEMET	CAP TANT POLY 500UF 60V CHAS MNT	0
T540D477M003BH8505WAFL KEMET	CAP TANT POLY 470UF 3V 2917	0
T521B684M063ATE200 KEMET	CAP TANT POLY 0.68UF 63V 1411	1959
T541X108K003DH8505 KEMET	CAP TANT POLY 1000UF 3V 2917	0
T540B686M006CH86107610 KEMET	CAP TANT POLY 68UF 6.3V 1411	0
T543X336M050AHE040 KEMET	CAP TANT POLY 33UF 50V 2917	12227
M550B108K060BS KEMET	CAP TANT POLY 1000UF 60V CHAS MT	0
T555B107M060AH KEMET	CAP TANT POLY 100UF 60V SMD	0
M550B507K050BH KEMET	CAP TANT POLY 500UF 50V CHAS MNT	0
T540D226M025AH8605 KEMET	CAP TANT POLY 22UF 25V 2917	0
T540D156M0DT8610 KEMET	CAP TANT POLY 15UF 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.