Air inductor WL1914

air corehigh-frequencyHF

Product Overview
An air core inductor coil is an electronic component formed by winding enameled copper wire into a coil without magnetic core materials. It provides low-loss inductance for high-frequency applications by using air as the magnetic path, avoiding core saturation and hysteresis. Typical uses include radio communications, RF circuits, antennas, filters, oscillators, audio crossover networks and industrial electronic systems.

Product Datasheet
Item - Description
Air Core Inductor Coil - Enameled copper wire
Wire Diameter - 0.20 mm (AWG options available)
Winding Type - Single-layer round or sectional winding
Core Material - Air (non-magnetic)
Footprint Length - 15 mm
Encapsulation - Optional varnish, epoxy or coating
Mounting - Through-hole or custom

Electrical Specifications (Typical)
Inductance Range - 0.1 µH – 100 µH (customizable)
Tolerance - ±2%, ±5%, ±10%
DC Resistance (DCR) - 14 Ω (example with 5.5 turns)
Q Factor - High Q, optimized per frequency range
Self-Resonant Frequency - High (application dependent)
Operating Frequency - kHz to MHz range
Rated Current - Specified per design
Insulation Resistance - ≥100 MΩ

Working Principle
The coil operates by electromagnetic induction: current through the winding generates a magnetic field in air; changes in current induce a voltage opposing rapid variations. Inductance is defined by the number of turns, coil diameter, spacing and wire gauge.

Features

• Optimized for high-frequency performance
• No magnetic core saturation or hysteresis
• Low core loss and signal distortion
• Stable inductance across specified range
• Compact and lightweight
• Fast electromagnetic response
• High Q factor for RF applications
• Suitable for precise signal transmission
• Customizable size and inductance
• Good thermal stability

Applications

• RF communication equipment and antennas
• Signal filters and oscillators
• Audio crossover networks and high-end audio
• Precision measurement and medical electronics
• Industrial automation: sensing, control and filtering
• IoT modules, wireless charging and 5G components
• High-frequency converters

Advantages & Disadvantages

• Advantages: high-frequency stability, no core losses, high linearity, high Q, lightweight and easy customization
• Disadvantages: lower inductance density compared with magnetic-core inductors, potentially higher copper losses at high currents, weaker field concentration

Technical Specifications

• Material: enameled copper wire
• Wire diameter: 0.20 mm (AWG options available)
• Winding: single-layer round or sectional
• Core: air (non-magnetic)
• Footprint length: 15 mm
• Encapsulation: varnish, epoxy or coating options
• Mounting: through-hole or custom
• Inductance range: 0.1 µH – 100 µH (customizable)
• Tolerance: ±2%, ±5%, ±10%
• DC resistance example: 14 Ω (5.5 turns)
• Operating frequency: kHz to MHz
• Insulation resistance: ≥100 MΩ
• Rated current: per custom design

Troubleshooting Notes
Common issues include incorrect winding spacing, loose turns, overheating from excessive current or undersized wire, and EMI from nearby components. Verify winding integrity, measure inductance and resistance, check wire gauge and ventilation, and adjust mounting or spacing as required.