Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T520V157M010ATE025 KEMET	CAP TANT POLY 150UF 10V 2917	526
T540D477M004CH8610 KEMET	CAP TANT POLY 470UF 4V 2917	0
T543D685M063ATE0757280 KEMET	CAP TANT POLY 6.8UF 63V 2917	0
T520T476M006ATE070 KEMET	CAP TANT POLY 47UF 6.3V 1411	8744
T540D336K020AH8705 KEMET	CAP TANT POLY 33UF 20V 2917	0
T541X107M030BH6510 KEMET	CAP TANT POLY 100UF 30V 2917	0
M550B108M040BS KEMET	CAP TANT POLY 1000UF 40V CHAS MT	0
T541X477K006CT8505 KEMET	CAP TANT POLY 470UF 6.3V 2917	0
T540D227M004DH86057610 KEMET	CAP TANT POLY 220UF 4V 2917	0
T598B225M050AHE200 KEMET	CAP TANT POLY 2.2UF 50V 1411	0
T541X476K030AT8610 KEMET	CAP TANT POLY 47UF 30V 2917	0
T540B336M006DH8710 KEMET	CAP TANT POLY 33UF 6.3V 1411	0
T551B127K040AT KEMET	CAP TANT POLY 120UF 40V AXIAL	0
T521V336M025AHE0407280 KEMET	CAP TANT POLY 33UF 25V 2917	0
T541X476K030CT8710 KEMET	CAP TANT POLY 47UF 30V 2917	0
T540B336K010CH86107610 KEMET	CAP TANT POLY 33UF 10V 1411	0
T541X108M004BH8505 KEMET	CAP TANT POLY 1000UF 4V 2917	0
M551B108M025AG KEMET	CAP TANT POLY 1000UF 25V CHAS MT	0
T540B107K003BH8610WAFL KEMET	CAP TANT POLY 100UF 3V 1411	0
M551B507K040AG KEMET	CAP TANT POLY 500UF 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.