Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T551B107K025AH4251 KEMET	CAP TANT POLY 100UF 25V AXIAL	0
T540D337M006AH87107610 KEMET	CAP TANT POLY 330UF 6.3V 2917	0
TCJX476M020R0070E Elco (AVX)	CAP TANT POLY 47UF 20V 2917	2468
M551B347K030AT KEMET	CAP TANT POLY 340UF 30V CHAS MNT	0
T543X107M025ATE060 KEMET	CAP TANT POLY 100UF 25V 2917	1693
T598D336M035AHE065 KEMET	CAP TANT POLY 33UF 35V 2917	0
TCJB684M063R0300E Elco (AVX)	CAP TANT POLY 0.68UF 63V 1411	1980
6TPG150M Panasonic	CAP TANT POLY 150UF 6.3V 1411	0
T543X226K063AHW075 KEMET	CAP TANT POLY 22UF 63V 2917	0
6THB330M Panasonic	CAP TANT POLY 330UF 6.3V 2917	331
T540B336M006CH87107280 KEMET	CAP TANT POLY 33UF 6.3V 1411	0
T55A107M6R3C0070 Vishay / Sprague	CAP TANT POLY 100UF 6.3V 1206	0
T555B397M015AT KEMET	CAP TANT POLY 390UF 15V SMD	0
T540D157M010AH6710 KEMET	CAP TANT POLY 150UF 10V 2917	143
M550B108K025TS KEMET	CAP TANT POLY 1000UF 25V CHAS MT	0
T540B226M010CH87107280 KEMET	CAP TANT POLY 22UF 10V 1411	0
T540D337M003BH8605 KEMET	CAP TANT POLY 330UF 3V 2917	0
T540D226K0DT8705 KEMET	CAP TANT POLY 22UF 2917	0
M551B127K100AA KEMET	CAP TANT POLY 120UF 100V CHAS MT	0
T541X107K025CH8610 KEMET	CAP TANT POLY 100UF 25V 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.