Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T521D476M020ATE055 KEMET	CAP TANT POLY 47UF 20V 2917	127
T540D337M003CH85057280 KEMET	CAP TANT POLY 330UF 3V 2917	0
M550B108M040TT KEMET	CAP TANT POLY 1000UF 40V CHAS MT	0
TCJE476M025R0050 Elco (AVX)	CAP TANT POLY 47UF 25V 2917	1451
T540B157K003BH85107280 KEMET	CAP TANT POLY 150UF 3V 1411	0
T541X227M016DH8510 KEMET	CAP TANT POLY 220UF 16V 2917	0
M551B507M050AG KEMET	CAP TANT POLY 500UF 50V CHAS MNT	0
T598B475M035AHS200 KEMET	CAP TANT POLY 4.7UF 35V 1411	0
T550B107K060AT0100 KEMET	CAP TANT POLY 100UF 60V AXIAL	0
M550B108K040TT KEMET	CAP TANT POLY 1000UF 40V CHAS MT	0
T540D477K004DH8610 KEMET	CAP TANT POLY 470UF 4V 2917	0
T520B227M2R5ATE021 KEMET	CAP TANT POLY 220UF 2.5V 1411	1625
T540D336M0BT8505 KEMET	CAP TANT POLY 33UF 2917	0
T541X158M2R5AH8605 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
T555B107M040AH KEMET	CAP TANT POLY 100UF 40V SMD	0
T55B336M6R3C0200 Vishay / Sprague	CAP TANT POLY 33UF 6.3V 1411	0
TCJY107M020R0055E Elco (AVX)	CAP TANT POLY 100UF 20V 2917	3470
T540D336M025BH8705 KEMET	CAP TANT POLY 33UF 25V 2917	0
T598D157M010AHE045 KEMET	CAP TANT POLY 150UF 10V 2917	0
M550B127M100BH KEMET	CAP TANT POLY 120UF 100V CHAS MT	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.