Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T556B107K050AT KEMET	CAP TANT POLY 100UF 50V SMD	0
T55V477M6R3C0050 Vishay / Sprague	CAP TANT POLY 470UF 6.3V 2917	1529
T541X687K004AT8505 KEMET	CAP TANT POLY 680UF 4V 2917	0
T598V157M006AHS025 KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T520B227M2R5ATE035 KEMET	CAP TANT POLY 220UF 2.5V 1411	626
M551B108K060AS KEMET	CAP TANT POLY 1000UF 60V CHAS MT	0
T598V107M010AHS045 KEMET	CAP TANT POLY 100UF 10V 2917	0
T555B206K060AT KEMET	CAP TANT POLY 20UF 60V SMD	0
T555B127M015AT KEMET	CAP TANT POLY 120UF 15V SMD	0
M550B128M040BT KEMET	CAP TANT POLY 1200UF 40V CHAS MT	0
TCME226M035R0025E Elco (AVX)	CAP TANT POLY 22UF 35V 2917	295
T58W0476M8R2C0500 Vishay / Sprague	CAP TANT POLY 47UF 8.2V 0805	6125
T540B336M006AH8710WAFL KEMET	CAP TANT POLY 33UF 6.3V 1411	0
T521T336M016AHE045 KEMET	CAP TANT POLY 33UF 16V 1411	0
T551B107M010AH KEMET	CAP TANT POLY 100UF 10V AXIAL	0
T541X157M016CT8610 KEMET	CAP TANT POLY 150UF 16V 2917	0
T541X107K020CT8610 KEMET	CAP TANT POLY 100UF 20V 2917	0
T541X687K004DH8705 KEMET	CAP TANT POLY 680UF 4V 2917	0
T541X157M016DT8610 KEMET	CAP TANT POLY 150UF 16V 2917	0
T540D227K006CH8505WAFL KEMET	CAP TANT POLY 220UF 6.3V 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.