Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
2R5TAE220M Panasonic	CAP TANT POLY 220UF 2.5V 2917	3000
T550B686M030AH KEMET	CAP TANT POLY 68UF 30V AXIAL	0
T541X337M016CT8520 KEMET	CAP TANT POLY 330UF 16V 2917	0
T520H108M006ATE055 KEMET	CAP TANT POLY 1000UF 6.3V 2924	1146
T541X107K030AH8510 KEMET	CAP TANT POLY 100UF 30V 2917	0
T540D157K010AH85107280 KEMET	CAP TANT POLY 150UF 10V 2917	0
T541X686K030AT8510 KEMET	CAP TANT POLY 68UF 30V 2917	0
T541X686K030BT8620 KEMET	CAP TANT POLY 68UF 30V 2917	0
T540B686M006AH85107610 KEMET	CAP TANT POLY 68UF 6.3V 1411	0
T540D687M003DH85057280 KEMET	CAP TANT POLY 680UF 3V 2917	0
TCJA476M006R0200E Elco (AVX)	CAP TANT POLY 47UF 6.3V 1206	8994
F381A226MSA Elco (AVX)	CAP TANT POLY 22UF 10V 0805	706
T540D477M2R5CH86057610 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
TCN4157M025R0070 Elco (AVX)	CAP TANT POLY 150UF 25V 2924	4991
T540B686K004DH86107610 KEMET	CAP TANT POLY 68UF 4V 1411	0
T550B127K040AH4251 KEMET	CAP TANT POLY 120UF 40V AXIAL	0
T550B127M050AH4250 KEMET	CAP TANT POLY 120UF 50V AXIAL	0
M550B507M040BH KEMET	CAP TANT POLY 500UF 40V CHAS MNT	0
T541X107K030CT8510 KEMET	CAP TANT POLY 100UF 30V 2917	0
TCBB476M006CRSZ0700 Elco (AVX)	CAP TANT POLY 47UF 6.3V 1411	2000

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.