Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T550B107K060BH4251 KEMET	CAP TANT POLY 100UF 60V AXIAL	0
T540D337K004AH86057280 KEMET	CAP TANT POLY 330UF 4V 2917	0
TCJD685M063R0120E Elco (AVX)	CAP TANT POLY 6.8UF 63V 2917	0
T540B157M003BH8510 KEMET	CAP TANT POLY 150UF 3V 1411	0
T540D687K2R5DH8705 KEMET	CAP TANT POLY 680UF 2.5V 2917	0
T525T476M006ATE080 KEMET	CAP TANT POLY 47UF 6.3V 1411	6446
TCJB157M006S0035 Elco (AVX)	CAP TANT POLYMER	0
T540B686K004DH8610WAFL KEMET	CAP TANT POLY 68UF 4V 1411	0
T551B506K025AH KEMET	CAP TANT POLY 50UF 25V AXIAL	0
TCJY686M010R0045 Elco (AVX)	CAP TANT POLY 68UF 10V 2917	4421
T541X337K016DH8710 KEMET	CAP TANT POLY 330UF 16V 2917	0
TCJE686M025R0050E Elco (AVX)	CAP TANT POLY 68UF 25V 2917	0
T540D337K2R5DH86057610 KEMET	CAP TANT POLY 330UF 2.5V 2917	0
T521B226M020ATE090 KEMET	CAP TANT POLY 22UF 20V 1411	597
T540B476K006DH87107610 KEMET	CAP TANT POLY 47UF 6.3V 1411	0
T540D227M004CH85057610 KEMET	CAP TANT POLY 220UF 4V 2917	0
T551B476M050AH4251 KEMET	CAP TANT POLY 47UF 50V AXIAL	0
TCJA476M006R0100 Elco (AVX)	CAP TANT POLY 47UF 6.3V 1206	1880
T540B107M004BH8510 KEMET	CAP TANT POLY 100UF 4V 1411	0
T541X686K030BT8720 KEMET	CAP TANT POLY 68UF 30V 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.