Niobium Oxide Capacitors

Part Number	Description / PDF	Quantity
NOJC476M004RWJ Elco (AVX)	CAP NIOB OXIDE 47UF 20% 4V 2312	0
NOJE477M004RWJ Elco (AVX)	CAP NIOB OXIDE 470UF 20% 4V 2917	0
NOJA336M004SWJ Elco (AVX)	CAP NIOB OXIDE 33UF 20% 4V 1206	0
NOJX686M006RWJ Elco (AVX)	CAP NIOB OXID 68UF 20% 6.3V 2917	0
NOME227M006R0040 Elco (AVX)	CAP NIOB OXI 220UF 20% 6.3V 2917	0
NOME477M002R0030 Elco (AVX)	CAP NIOB OXI 470UF 20% 2.5V 2917	0
NOSD107M006R0100 Elco (AVX)	CAP NIOB OXI 100UF 20% 6.3V 2917	3184
NOSD227M004R0060 Elco (AVX)	CAP NIOB OXIDE 220UF 20% 4V 2917	652
NOSC476M004R0300 Elco (AVX)	CAP NIOB OXIDE 47UF 20% 4V 2312	0
NOSC107M004R0070 Elco (AVX)	CAP NIOB OXIDE 100UF 20% 4V 2312	730
NOJB686M002RWJ Elco (AVX)	CAP NIOB OXID 68UF 20% 2.5V 1210	0
NOJA685M006RWJ Elco (AVX)	CAP NIOB OXI 6.8UF 20% 6.3V 1206	0
NOJD107M006RWJ Elco (AVX)	CAP NIOB OXI 100UF 20% 6.3V 2917	0
NOJD157M004RWJ Elco (AVX)	CAP NIOB OXIDE 150UF 20% 4V 2917	0
NOSA106M006S0800 Elco (AVX)	CAP NIOB OXID 10UF 20% 6.3V 1206	0
NOSB336M006R0600 Elco (AVX)	CAP NIOB OXID 33UF 20% 6.3V 1210	131
NOJP475M006RWJ Elco (AVX)	CAP NIOB OXI 4.7UF 20% 6.3V 0805	0
NOJP226M001RWJ Elco (AVX)	CAP NIOB OXID 22UF 20% 1.8V 0805	0
NOJA106M006RWJ Elco (AVX)	CAP NIOB OXID 10UF 20% 6.3V 1206	0
NOJF107M006RWJ Elco (AVX)	CAP NIOB OXI 100UF 20% 6.3V 2312	0

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