Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
M550B828M006AA KEMET	CAP TANT POLY 8200UF 6V CHAS MNT	0
T521B226M025ATE100 KEMET	CAP TANT POLY 22UF 25V 1411	0
M551B607K040AA KEMET	CAP TANT POLY 600UF 40V CHAS MNT	0
T520X687M004ATE010 KEMET	CAP TANT POLY 680UF 4V 2917	0
T541X477K010DT8510 KEMET	CAP TANT POLY 470UF 10V 2917	0
T540D477M2R5AH8605 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
M550B507M060BH KEMET	CAP TANT POLY 500UF 60V CHAS MNT	0
T541X337M016DT8720 KEMET	CAP TANT POLY 330UF 16V 2917	0
T540D336M020BH8605 KEMET	CAP TANT POLY 33UF 20V 2917	0
T540B107M004AH8510WAFL KEMET	CAP TANT POLY 100UF 4V 1411	0
TCJY337M006R0040E Elco (AVX)	CAP TANT POLY 330UF 6.3V 2917	920
M550B108M025BA KEMET	CAP TANT POLY 1000UF 25V CHAS MT	0
T55A106M6R3C0200 Vishay / Sprague	CAP TANT POLY 10UF 6.3V 1206	932
T540D477K2R5AH86057280 KEMET	CAP TANT POLY 470UF 2.5V 2917	0
TCJT685M025R0150 Elco (AVX)	CAP TANT POLY 6.8UF 25V 1411	298537500
T598B225M050ATE200 KEMET	CAP TANT POLY 2.2UF 50V 1411	1737
T550B756K075AH KEMET	CAP TANT POLY 75UF 75V AXIAL	70
T540B476M006DH8510WAFL KEMET	CAP TANT POLY 47UF 6.3V 1411	0
T540D476K020BT8505 KEMET	CAP TANT POLY 47UF 20V 2917	0
T541X107K020DT8610 KEMET	CAP TANT POLY 100UF 20V 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.