Tantalum Capacitors

Part Number	Description / PDF	Quantity
134D687X9050K6 Vishay	CAP TANT 680UF 10% 50V AXIAL	21
135D127X9008F6 Vishay	CAP TANT 120UF 10% 8V AXIAL	0
135D826X9015C2 Vishay	CAP TANT 82UF 10% 15V AXIAL	0
135D226X9025C6 Vishay	CAP TANT 22UF 10% 25V AXIAL	25
135D127X9010C2 Vishay	CAP TANT 120UF 10% 10V AXIAL	0
135D227X9008F2 Vishay	CAP TANT 220UF 10% 8V AXIAL	0
M39006/22-0365 Vishay	CAP TANT 8.2UF 10% 60V AXIAL	0
135D566X9008C6 Vishay	CAP TANT 56UF 10% 8V AXIAL	0
135D128X9006K6 Vishay	CAP TANT 1200UF 10% 6V AXIAL	0
STE1000-60T4KI Vishay	CAP TANT 1000UF 10% 60V AXIAL	0
T16B686K100EZSS Vishay	CAP TANT 68UF 10% 100V AXIAL	0
135D206X9010C2 Vishay	CAP TANT 20UF 10% 10V AXIAL	0
ST1200-25T3KI Vishay	CAP TANT 1200UF 10% 25V AXIAL	0
135D156X9075F6 Vishay	CAP TANT 15UF 10% 75V AXIAL	0
ST680-50T4KI Vishay	CAP TANT 680UF 10% 50V AXIAL	13
135D306X9006C6 Vishay	CAP TANT 30UF 10% 6V AXIAL	0
ST250-75L2KI Vishay	CAP TANT 250UF 10% 75V AXIAL	0
109D187X9025T2 Vishay	CAP TANT 180UF 10% 25V AXIAL	0
135D476X9010C2 Vishay	CAP TANT 47UF 10% 10V AXIAL	0
T22C106K125USS Vishay	T22S106K125CUS	25

Tantalum Capacitors

Tantalum capacitors are a type of electrolytic capacitor known for their high capacitance density, stability, and reliability. Utilizing tantalum metal as the anode material, these capacitors form a thin insulating oxide layer as the dielectric, enabling efficient charge storage in compact sizes. Their ability to maintain stable capacitance under varying temperatures and voltages makes them critical components in modern electronics, particularly in applications requiring long-term performance and miniaturization, such as consumer electronics, automotive systems, and medical devices.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Solid Electrolyte Tantalum Capacitors	High reliability, low leakage current, and stable performance at elevated temperatures	Power supply circuits in smartphones, laptops, and industrial control systems
Wet Electrolyte Tantalum Capacitors	High capacitance values, excellent stability over time	Aerospace systems, military equipment, and high-reliability energy storage
Polymer Electrolyte Tantalum Capacitors	Low equivalent series resistance (ESR), improved safety, and vibration resistance	Medical implants (e.g., pacemakers), automotive sensors, and high-frequency circuits

3. Structure and Composition

A typical tantalum capacitor consists of four key components:

Anode: Sintered tantalum metal pellet with porous structure for increased surface area.
Dielectric: A thin layer of tantalum pentoxide (Ta₂O₅) formed electrochemically on the anode surface.
Electrolyte: Conductive material (solid MnO₂, liquid electrolyte, or conductive polymer) serving as the cathode.
Encapsulation: Epoxy resin or ceramic casing for mechanical protection and electrical insulation.

This layered structure ensures high capacitance density while maintaining stability under thermal and electrical stress.

4. Key Technical Specifications

Parameter	Description	Importance
Capacitance (C)	Range: 0.1 F to 1000 F	Determines energy storage capacity and filtering effectiveness
Rated Voltage (V_R)	Typically 2.5V to 50V	Defines safe operating voltage range without dielectric breakdown
Leakage Current	Typically < 0.01 C V_R A	Affects circuit efficiency and long-term reliability
Equivalent Series Resistance (ESR)	0.1 to 10 (varies by type)	Impacts high-frequency performance and thermal dissipation
Operating Temperature Range	-55 C to +125 C	Determines suitability for industrial and automotive applications

5. Application Fields

Consumer Electronics: Mobile phones (decoupling circuits), laptops (power management), and wearable devices.
Automotive: Engine control units (ECUs), ADAS sensors, and infotainment systems.
Medical Devices: Pacemakers, defibrillators, and diagnostic imaging equipment.
Aerospace: Avionics systems, satellite power supplies, and radar equipment.

6. Leading Manufacturers and Representative Products

Manufacturer	Product Series	Key Features
AVX Corporation	TAJ Series	Low ESR polymer capacitors for high-frequency applications
KEMET Electronics	T511 Series	Military-grade wet electrolyte capacitors with extended lifespan
Vishay Intertechnology	TVCQ Series	Automotive-qualified capacitors with AEC-Q200 compliance

7. Selection Guidelines

Key factors to consider when selecting tantalum capacitors:

Operating Conditions: Ensure rated voltage exceeds circuit requirements by 20-50% to prevent voltage spikes.
Temperature Requirements: Choose appropriate dielectric materials for extreme temperature environments.
Size Constraints: Polymer electrolyte types offer lower ESR in smaller packages for space-limited designs.
Reliability Needs: Prioritize hermetically sealed packages for mission-critical applications (e.g., aerospace).
Cost vs. Performance: Solid electrolyte capacitors provide optimal cost-effectiveness for general electronics.

Always verify compliance with industry standards such as MIL-PRF-55365 for military use or AEC-Q200 for automotive applications.

8. Industry Trends and Future Outlook

Key development trends include:

Miniaturization: Advancements in powder sintering technology enable 0603/0402 package sizes with capacitance above 100 F.
High-Temperature Stability: New dielectric materials extend operational limits to 200 C for EV and 5G infrastructure.
ESR Reduction: Conductive polymer electrolytes now achieve ESR below 10m for high-efficiency power systems.
Environmental Compliance: Lead-free terminations and RoHS-compliant encapsulation materials becoming standard.
Integration: Embedded tantalum capacitors in SiP (System-in-Package) modules for advanced computing.

The global market is projected to grow at 6.2% CAGR through 2030, driven by demand in IoT devices, electric vehicles, and medical electronics.