Tantalum Capacitors

Part Number	Description / PDF	Quantity
T491C156M010AT2478 KEMET	CAP TANT 15UF 20% 10V 2312	0
T491B107M004AH KEMET	CAP TANT 100UF 20% 4V 1411	0
T491B686K006AH KEMET	CAP TANT 68UF 10% 6.3V 1411	0
T499B474K035ATE8K0 KEMET	CAP TANT 0.47UF 10% 35V 1411	1218
T510X157K016ATE030 KEMET	CAP TANT 150UF 10% 16V 2917	882
T495D686M006ATE180 KEMET	CAP TANT 68UF 20% 6.3V 2917	0
T491C685M025AT42807333 KEMET	CAP TANT 6.8UF 20% 25V 2312	0
T322D106K035AS7200 KEMET	CAP TANT 10UF 10% 35V AXIAL	0
T495X106M035ATE200 KEMET	CAP TANT 10UF 20% 35V 2917	0
T491D476K016AH4814 KEMET	CAP TANT 47UF 10% 16V 2917	0
T322C106M020AS KEMET	CAP TANT 10UF 20% 20V AXIAL	157
T498A105K035ATE10K KEMET	CAP TANT 1UF 10% 35V 1206	0
T355E225K050AT KEMET	CAP TANT 2.2UF 10% 50V RADIAL	0
T491D226M025AT4069 KEMET	CAP TANT 22UF 20% 25V 2917	0
T322E686K020AT KEMET	CAP TANT 68UF 10% 20V AXIAL	0
T498X336K035ATE500 KEMET	CAP TANT 33UF 10% 35V 2917	369
T491C336K016AH KEMET	CAP TANT 33UF 10% 16V 2312	0
T491D107M010AT4280 KEMET	CAP TANT 100UF 20% 10V 2917	0
T322D106M035AS KEMET	CAP TANT 10UF 20% 35V AXIAL	0
T491X106K050AT KEMET	CAP TANT 10UF 10% 50V 2917	3575

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.