Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T550B256K100BH0100 KEMET	CAP TANT POLY 25UF 100V AXIAL	0
M550B208K015AG KEMET	CAP TANT POLY 2000UF 15V CHAS MT	0
T540D687M003BH87057280 KEMET	CAP TANT POLY 680UF 3V 2917	0
M550B108M060AA KEMET	CAP TANT POLY 1000UF 60V CHAS MT	0
T541X158K003CH8505 KEMET	CAP TANT POLY 1500UF 3V 2917	0
T541X107K030DH8620 KEMET	CAP TANT POLY 100UF 30V 2917	0
T520U686M006ATE070 KEMET	CAP TANT POLY 68UF 6.3V 2312	0
T551B107M040AT KEMET	CAP TANT POLY 100UF 40V AXIAL	0
T540D156M035BT8510 KEMET	CAP TANT POLY 15UF 35V 2917	0
T530D227M010ATE006 KEMET	CAP TANT POLY 220UF 10V 2917	6759
T523H108M010APE0707280 KEMET	CAP TANT POLY 1000UF 10V 2924	0
M550B128M050AG KEMET	CAP TANT POLY 1200UF 50V CHAS MT	0
T540D336M020DT8705 KEMET	CAP TANT POLY 33UF 20V 2917	0
M550B257K100BS KEMET	CAP TANT POLY 250UF 100V CHAS MT	0
T550B107K025AH KEMET	CAP TANT POLY 100UF 25V AXIAL	0
T540D477M2R5CH8605 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
T541X336M035AH8610 KEMET	CAP TANT POLY 33UF 35V 2917	0
T540D157M006BH8605 KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T541X158K2R5DH8505 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
T551B127M040AT KEMET	CAP TANT POLY 120UF 40V AXIAL	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.