Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T550B396M060AT4250 KEMET	CAP TANT POLY 39UF 60V AXIAL	0
T520D227M010AHE018 KEMET	CAP TANT POLY 220UF 10V 2917	0
T540D687M2R5AH8505 KEMET	CAP TANT POLY 680UF 2.5V 2917	0
T541X158K2R5AT8605 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
TCJB106M016R0100E Elco (AVX)	CAP TANT POLY 10UF 16V 1411	3626
TCJC225M063R0200 Elco (AVX)	CAP TANT POLY 2.2UF 63V 2312	764
M550B757M075TH KEMET	CAP TANT POLY 750UF 75V CHAS MNT	0
T540D156K035AH8610 KEMET	CAP TANT POLY 15UF 35V 2917	0
T551B147K006AH4251 KEMET	CAP TANT POLY 140UF 6.3V AXIAL	0
T543V685K050ATW0657280 KEMET	CAP TANT POLY 6.8UF 50V 2917	0
T540D687M2R5BH8505 KEMET	CAP TANT POLY 680UF 2.5V 2917	0
T541X107M020AH8710 KEMET	CAP TANT POLY 100UF 20V 2917	0
T551B406K030AT4251 KEMET	CAP TANT POLY 40UF 30V AXIAL	0
T540B107M003BH85107610 KEMET	CAP TANT POLY 100UF 3V 1411	0
T540D477M004DH8610WAFL KEMET	CAP TANT POLY 470UF 4V 2917	0
T523W107M016APE070 KEMET	CAP TANT POLY 100UF 16V 2917	2400
T541X107M020CT8710 KEMET	CAP TANT POLY 100UF 20V 2917	0
TCJB226M025R0100E Elco (AVX)	CAP TANT POLY 22UF 25V 1411	2000
T540D336M025BH8505 KEMET	CAP TANT POLY 33UF 25V 2917	0
T541X158K003DT8505 KEMET	CAP TANT POLY 1500UF 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.