Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T520B476M008ATE070 KEMET	CAP TANT POLY 47UF 8V 1411	3
TCJC156M035R0200E Elco (AVX)	CAP TANT POLY 15UF 35V 2312	353
T540D477M003AH87057280 KEMET	CAP TANT POLY 470UF 3V 2917	0
T520D477M006ATE030 KEMET	CAP TANT POLY 470UF 6.3V 2917	860
T541X108K004BH8705 KEMET	CAP TANT POLY 1000UF 4V 2917	0
T541X686K0DT8510 KEMET	CAP TANT POLY 68UF 2917	0
M551B128M050AT KEMET	CAP TANT POLY 1200UF 50V CHAS MT	0
T598B336M006ATE070 KEMET	CAP TANT POLY 33UF 6.3V 1411	1800
TCNL107M006R0200E Elco (AVX)	CAP TANT POLY 100UF 6.3V 1411	0
T551B107M010AT4251 KEMET	CAP TANT POLY 100UF 10V AXIAL	0
T540D687K2R5BH85057280 KEMET	CAP TANT POLY 680UF 2.5V 2917	0
T540B686M004BH8710WAFL KEMET	CAP TANT POLY 68UF 4V 1411	0
T540D477K2R5DH8505 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
T540D226M030DT8705 KEMET	CAP TANT POLY 22UF 30V 2917	0
TCQD157M010R0025E Elco (AVX)	CAP TANT POLY 150UF 10V 2917	498
T55B476M004C0150 Vishay / Sprague	CAP TANT POLY 47UF 4V 1411	0
M550B108M040BT KEMET	CAP TANT POLY 1000UF 40V CHAS MT	0
TCJD335M125R0250E Elco (AVX)	CAP TANT POLY 3.3UF 125V 2917	899
T551B397M015AT KEMET	CAP TANT POLY 390UF 15V AXIAL	0
T550B147M006AH KEMET	CAP TANT POLY 140UF 6V 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.