Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T551B397M015AH4251 KEMET	CAP TANT POLY 390UF 15V AXIAL	0
T541X108K2R5CH8705 KEMET	CAP TANT POLY 1000UF 2.5V 2917	0
T556B147K006AH KEMET	CAP TANT POLY 140UF 6.3V SMD	0
T540D226M020BH8505 KEMET	CAP TANT POLY 22UF 20V 2917	0
T540B686K006DH87107610 KEMET	CAP TANT POLY 68UF 6.3V 1411	0
T541X687K006AT8710 KEMET	CAP TANT POLY 680UF 6.3V 2917	0
M550B507M040AG KEMET	CAP TANT POLY 500UF 40V CHAS MNT	0
T540B107M003AH8610 KEMET	CAP TANT POLY 100UF 3V 1411	0
T598B336M006AHS070 KEMET	CAP TANT POLY 33UF 6.3V 1411	0
T540D477K003DH8505 KEMET	CAP TANT POLY 470UF 3V 2917	0
M550B607K050AS KEMET	CAP TANT POLY 600UF 50V CHAS MNT	0
T540B336K010CH8610WAFL KEMET	CAP TANT POLY 33UF 10V 1411	0
T521D685M063ANE075 KEMET	CAP TANT POLY 6.8UF 63V 2917	0
6TPE470MAZU Panasonic	CAP TANT POLY 470UF 6.3V 2917	0
T598D157M006ATE0257280 KEMET	CAP TANT POLY 150UF 6.3V 2917	0
T541X337M016AT8510 KEMET	CAP TANT POLY 330UF 16V 2917	0
T55D106M050C0090 Vishay / Sprague	CAP TANT POLY 10UF 50V 2917	0
T540D226M020DH8605 KEMET	CAP TANT POLY 22UF 20V 2917	0
T540B157K003BH8610WAFL KEMET	CAP TANT POLY 150UF 3V 1411	0
T520B476M006AHE070 KEMET	CAP TANT POLY 47UF 6.3V 1411	4188

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.