Tantalum - Polymer Capacitors

Part Number	Description / PDF	Quantity
T541X477K006CH8605 KEMET	CAP TANT POLY 470UF 6.3V 2917	0
T540B336M010CH86107280 KEMET	CAP TANT POLY 33UF 10V 1411	0
T541X158M2R5DT8605 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
M550B757K075AH KEMET	CAP TANT POLY 750UF 75V CHAS MNT	0
T540B336M010BH85107610 KEMET	CAP TANT POLY 33UF 10V 1411	0
TCJD106M050R0090E Elco (AVX)	CAP TANT POLY 10UF 50V 2917	370
T540D477M004CH87107280 KEMET	CAP TANT POLY 470UF 4V 2917	0
T520C157M004ATE025 KEMET	CAP TANT POLY 150UF 4V 2312	0
M551B108K025AG KEMET	CAP TANT POLY 1000UF 25V CHAS MT	0
T555B256K100AH KEMET	CAP TANT POLY 25UF 100V SMD	0
T540B336K006DH8710 KEMET	CAP TANT POLY 33UF 6.3V 1411	0
T55Z477M2R5C0025 Vishay / Sprague	CAP TANT POLY 470UF 2.5V 2917	800
T550B756M075AT4252 KEMET	CAP TANT POLY 75UF 75V AXIAL	0
M551B108M050AT KEMET	CAP TANT POLY 1000UF 50V CHAS MT	0
M550B507K040AA KEMET	CAP TANT POLY 500UF 40V CHAS MNT	0
T541X158M2R5BT8605 KEMET	CAP TANT POLY 1500UF 2.5V 2917	0
TCJB226M020R0150 Elco (AVX)	CAP TANT POLY 22UF 20V 1411	175
T550B107K025AT4250 KEMET	CAP TANT POLY 100UF 25V AXIAL	0
TCOB1A336M8R ROHM Semiconductor	CAP TANT POLY 33UF 10V 1411	0
M551B507K040AA KEMET	CAP TANT POLY 500UF 40V CHAS MNT	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.