Tantalum Capacitors

Part Number	Description / PDF	Quantity
TD47M6.3 NTE Electronics, Inc.	CAP TANT 47UF 20% 6.3V RADIAL	172
SCTC225K35 NTE Electronics, Inc.	CAP TANT 2.2UF 10% 35V 2312	410
SCTB155K25 NTE Electronics, Inc.	CAP TANT 1.5UF 10% 25V 1411/1210	1157
TD1.5M20 NTE Electronics, Inc.	CAP TANT 1.5UF 20% 20V RADIAL	128
TD33M25 NTE Electronics, Inc.	CAP TANT 33UF 20% 25V RADIAL	819
SCTD475K35 NTE Electronics, Inc.	CAP TANT 4.7UF 10% 35V 2917	408
TD10M35 NTE Electronics, Inc.	CAP TANT 10UF 20% 35V RADIAL	241
TD220M16 NTE Electronics, Inc.	CAP TANT 220UF 20% 16V RADIAL	132
TD1.0M50 NTE Electronics, Inc.	CAP TANT 1UF 20% 50V RADIAL	652
TD4.7M20 NTE Electronics, Inc.	CAP TANT 4.7UF 20% 20V RADIAL	860
TD22M35 NTE Electronics, Inc.	CAP TANT 22UF 20% 35V RADIAL	544
SCTA225K16 NTE Electronics, Inc.	CAP TANT 2.2UF 10% 16V 1206	1010
TD68M25 NTE Electronics, Inc.	CAP TANT 68UF 20% 25V RADIAL	160
TD1.5M16 NTE Electronics, Inc.	CAP TANT 1.5UF 20% 16V RADIAL	225
SCTB156K10 NTE Electronics, Inc.	CAP TANT 15UF 10% 10V 1411/1210	199
TD4.7M50 NTE Electronics, Inc.	CAP TANT 4.7UF 20% 50V RADIAL	164
TD22M16 NTE Electronics, Inc.	CAP TANT 22UF 20% 16V RADIAL	650
TD1.0M25 NTE Electronics, Inc.	CAP TANT 1UF 20% 25V RADIAL	886
TD3.3M6.3 NTE Electronics, Inc.	CAP TANT 3.3UF 20% 6.3V RADIAL	214
SCTD686K6.3 NTE Electronics, Inc.	CAP TANT 68UF 10% 6.3V 2917	410

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.