Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T551B127M040AT KEMET	CAP TANT POLY 120UF 40V AXIAL	0
T520D337M006ATE040 KEMET	CAP TANT POLY 330UF 6.3V 2917	0
T555B187M010AT KEMET	CAP TANT POLY 180UF 10V SMD	0
T540D476K020CT8505 KEMET	CAP TANT POLY 47UF 20V 2917	0
T540B226M010DH86107610 KEMET	CAP TANT POLY 22UF 10V 1411	0
M550B127K100AT KEMET	CAP TANT POLY 120UF 100V CHAS MT	0
10THC68M Panasonic	CAP TANT POLY 68UF 10V 2917	2925
T541X107M030CT8520 KEMET	CAP TANT POLY 100UF 30V 2917	0
T540B107K004AH8710WAFL KEMET	CAP TANT POLY 100UF 4V 1411	0
T540D477M2R5BH8705 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
T540D227M006AH86057610 KEMET	CAP TANT POLY 220UF 6.3V 2917	0
T550B187K010AH KEMET	CAP TANT POLY 180UF 10V AXIAL	0
TCBB336M006CRSZ0700 Elco (AVX)	CAP TANT POLY 33UF 6.3V 1411	4000
T550B256K050AT4250 KEMET	CAP TANT POLY 25UF 50V AXIAL	0
F381E225MMA Elco (AVX)	CAP TANT POLY 2.2UF 25V 0603	6295
T540B107K004DH8610WAFL KEMET	CAP TANT POLY 100UF 4V 1411	0
T520V226M020ATE040 KEMET	CAP TANT POLY 22UF 20V 2917	0
T598V157M010AHE045 KEMET	CAP TANT POLY 150UF 10V 2917	0
T540D337K2R5CH8505WAFL KEMET	CAP TANT POLY 330UF 2.5V 2917	0
T55A336M004C0200 Vishay / Sprague	CAP TANT POLY 33UF 4V 1206	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.