Niobium Oxide Capacitors

Image	Part Number	Description / PDF	Quantity	Rfq
	NOJC226M010SWJ Elco (AVX)	OXICAP	0
	NOJB476M006RWJV Elco (AVX)	OXICAP	0
	NOJC686M010SWJ Elco (AVX)	OXICAP	0
	NOJB476M006SWJ Elco (AVX)	OXICAP	0
	NOJB107M004SWB Elco (AVX)	OXICAP	0
	NOJD227M006SWJ Elco (AVX)	OXICAP	0
	NOJB226M010SWJ Elco (AVX)	OXICAP	0
	NOJA226M006RWJV Elco (AVX)	OXICAP	0
	NOJC107M004SWJ Elco (AVX)	OXICAP	0
	NOJB226M006RWJV Elco (AVX)	OXICAP	0
	NOJD107M006SWJ Elco (AVX)	OXICAP	0
	NOJA106M010RWJV Elco (AVX)	OXICAP	0
	NOJP335M010RWJV Elco (AVX)	OXICAP	0
	NOJA475M010RWJV Elco (AVX)	OXICAP	0
	NOJC157M006SWJ Elco (AVX)	OXICAP	0
	NOSC157M004R0400 Elco (AVX)	OXICAP	0
	NOSE337M006S0100 Elco (AVX)	OXICAP	0
	NOSB476M006R0800 Elco (AVX)	OXICAP	0
	NOJC686M006SWJ Elco (AVX)	OXICAP	0
	NOJA226M006SWJ Elco (AVX)	OXICAP	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