Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
M551B108M050AT KEMET	CAP TANT POLY 1000UF 50V CHAS MT	0
M550B507K040AA KEMET	CAP TANT POLY 500UF 40V CHAS MNT	0
T541X158M2R5BT8605 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
T550B107K025AT4250 KEMET	CAP TANT POLY 100UF 25V AXIAL	0
M551B507K040AA KEMET	CAP TANT POLY 500UF 40V CHAS MNT	0
T521V476M016AHE055 KEMET	CAP TANT POLY 47UF 16V 2917	0
T540B336K010DH85107610 KEMET	CAP TANT POLY 33UF 10V 1411	0
T541X158M2R5DT8505 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
T551B256K050AH KEMET	CAP TANT POLY 25UF 50V AXIAL	0
T550B567M010AT4250 KEMET	CAP TANT POLY 560UF 10V AXIAL	0
T551B107M025AT4251 KEMET	CAP TANT POLY 100UF 25V AXIAL	0
T521B685M035ATE200 KEMET	CAP TANT POLY 6.8UF 35V 1411	21
T540D336M025DH8705 KEMET	CAP TANT POLY 33UF 25V 2917	0
T540B686M004BH85107610 KEMET	CAP TANT POLY 68UF 4V 1411	0
T541X107M020CT8610 KEMET	CAP TANT POLY 100UF 20V 2917	0
T540D337K003CH87057610 KEMET	CAP TANT POLY 330UF 3V 2917	0
T540B157K003CH87107610 KEMET	CAP TANT POLY 150UF 3V 1411	0
T550B107M060AT42520100 KEMET	CAP TANT POLY 100UF 60V AXIAL	0
T543X337M016AHE025 KEMET	CAP TANT POLY 330UF 16V 2917	1090
T540B686M006BH85107610 KEMET	CAP TANT POLY 68UF 6.3V 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.