Niobium Oxide Capacitors

Part Number	Description / PDF	Quantity
NOSD227M004R0100 Elco (AVX)	CAP NIOB OXIDE 220UF 20% 4V 2917	0
NOJC157M006RWJ Elco (AVX)	CAP NIOB OXI 150UF 20% 6.3V 2312	0
NOME477M004R0030 Elco (AVX)	CAP NIOB OXIDE 470UF 20% 4V 2917	0
NOSD337M002R0035 Elco (AVX)	CAP NIOB OXI 330UF 20% 2.5V 2917	0
NOJW686M002RWJ Elco (AVX)	CAP NIOB OXID 68UF 20% 2.5V 2312	0
NOJT475M010RWJ Elco (AVX)	CAP NIOB OXID 4.7UF 20% 10V 1210	0
NOSD477M002R0055 Elco (AVX)	CAP NIOB OXI 470UF 20% 2.5V 2917	0
NOSC686M006R0075 Elco (AVX)	CAP NIOB OXID 68UF 20% 6.3V 2312	0
NOME687M002R0023 Elco (AVX)	CAP NIOB OXI 680UF 20% 2.5V 2917	0
NOME337M006S0023 Elco (AVX)	CAP NIOB OXI 330UF 20% 6.3V 2917	0
NOSY686M006R0100 Elco (AVX)	CAP NIOB OXID 68UF 20% 6.3V 2917	0
NOSC686M004R0200 Elco (AVX)	CAP NIOB OXIDE 68UF 20% 4V 2312	0
NOJD477M002RWJ Elco (AVX)	CAP NIOB OXI 470UF 20% 2.5V 2917	0
NOME337M006R0035 Elco (AVX)	CAP NIOB OXI 330UF 20% 6.3V 2917	0
NOSD337M002R0100 Elco (AVX)	CAP NIOB OXI 330UF 20% 2.5V 2917	0
NOJB107M006RWJ Elco (AVX)	CAP NIOB OXI 100UF 20% 6.3V 1210	0
NOSC686M006R0200 Elco (AVX)	CAP NIOB OXID 68UF 20% 6.3V 2312	1036
NOSD227M006R0100 Elco (AVX)	CAP NIOB OXI 220UF 20% 6.3V 2917	0
NOJB106M010RWJ Elco (AVX)	CAP NIOB OXIDE 10UF 20% 10V 1210	56
NOJD157M006RWJ Elco (AVX)	CAP NIOB OXI 150UF 20% 6.3V 2917	537

Niobium Oxide Capacitors

1. Overview

Niobium oxide capacitors are solid-state electrolytic capacitors utilizing niobium pentoxide (Nb O ) as the dielectric material. They offer high capacitance density, excellent stability, and low leakage current compared to traditional aluminum or tantalum capacitors. Their importance in modern electronics stems from their reliability in critical applications such as automotive systems, industrial automation, and portable devices.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Solid Electrolyte Niobium Oxide Capacitors	High volumetric efficiency, low ESR (Equivalent Series Resistance)	Mobile devices, power supply units
Polymer Electrolyte Niobium Oxide Capacitors	Ultra-low ESR, improved thermal stability	High-frequency circuits, LED drivers
Hybrid Niobium-Oxide Capacitors	Combines solid and liquid electrolytes for balanced performance	Automotive ECUs, aerospace systems

3. Structure and Composition

A typical niobium oxide capacitor consists of:

Anode: Sintered niobium metal with high surface area
Dielectric Layer: Thermally oxidized Nb O film
Electrolyte: Conductive polymer or manganese dioxide (MnO )
Cathode: Graphite/silver epoxy coating

4. Key Technical Specifications

Parameter	Typical Range	Importance
Capacitance Range	1 1000 F	Determines energy storage capability
Rated Voltage	2.5 50 V	Defines safe operating limits
ESR	5 100 m	Impacts high-frequency performance
Leakage Current	0.01 0.1 A/ F	Affects power efficiency
Operating Temperature	-55 C to +125 C	Ensures reliability in harsh environments

5. Application Fields

Primary industries and devices include:

Consumer Electronics: Smartphones, notebooks, gaming consoles
Industrial: PLCs, motor drives, energy meters
Automotive: ADAS systems, battery management modules
Aerospace: Avionics, satellite power systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
AVX Corporation	NXJ Series	1000 F/16 V, 105 C rating
Vishay Intertechnology	Niobium Oxide VJ1005	0.1 F 4.7 F, 0805 package
TDK Corporation	C3225X5R16Y106M	X5R dielectric, 10 F/16 V

7. Selection Guidelines

Key considerations for optimal selection:

Capacitance-voltage (CV) product matching circuit requirements
ESR tolerance for switching frequency applications
Temperature derating curves
Physical size constraints (0603, 0805, etc.)
Cost vs. reliability trade-offs

8. Industry Trends

Emerging trends include:

Development of sub-1V ultra-low-voltage capacitors for IoT devices
Adoption of nanoscale oxide layers for 3 capacitance density improvement
Transition to lead-free packaging materials
Integration with MEMS systems for smart capacitors