Air inductor WL610

wire-woundair coreRF

Product Overview
An SMD air inductor coil is a surface-mount, wire‑wound inductor that uses air as the magnetic medium. Without a magnetic core, the component avoids core saturation and core losses, delivering superior high‑frequency performance and a high Q‑factor. These components are compact and available in SMT packaging for integration in industrial, automotive, telecommunications and medical electronics that require stable, low‑loss inductance.

Compact SMD Air Inductor Coil - Key Points
SMD air‑core design provides high self‑resonant frequency, absence of magnetic saturation and core losses, improved linearity, low DC resistance and stable performance across operating conditions. Available in multiple inductance values and package sizes; suitable for OEM customization and automated SMT assembly.

Typical Applications

• Antenna matching and wireless communication modules (Bluetooth, Wi‑Fi, GPS, RF transceivers)
• RF amplifiers, oscillators and signal filters
• Consumer electronics, mobile and portable devices
• Automotive telematics, navigation and communication units
• Medical electronics requiring stable low‑loss inductors
• Industrial control systems, measuring instruments and test equipment

Advantages

• No magnetic saturation
• No core losses at high frequency
• High Q‑factor optimized for RF ranges
• High self‑resonant frequency and improved linearity
• Low signal distortion and good temperature stability
• Surface‑mount packaging suitable for automated assembly

Disadvantages

• Lower inductance per volume compared with ferrite‑core inductors
• Larger physical size may be required for high inductance values
• Lower energy storage capability — not ideal for power‑storage inductors
• Potentially more susceptible to external EMI if PCB layout is not optimized
• Higher cost for precision or high‑inductance requirements

Product Datasheet (selected table entries)
Description - SMD Air Inductor Coil
Material - Enameled copper wire
Wire Diameter - 0.1 mm (AWG options available)
Winding Type - Single‑layer round or sectional winding
Core Material - Air (non‑magnetic)
Footprint length - 10–15 mm
Encapsulation - Optional varnish, epoxy or coating
Mounting - Through‑hole / Custom (SMT packaging available)

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

How it works (short)
When current flows through the coil, a magnetic field forms around the turns. With an air magnetic path there is no hysteresis or magnetic saturation. Inductive reactance increases with frequency, making air‑core SMD inductors effective as filters, impedance matchers and noise suppressors in high‑frequency circuits.

Troubleshooting & Common Issues

• Drift of inductance — Cause: mechanical deformation or temperature variation. Solution: select temperature‑stable parts with tight tolerance.
• Overheat — Cause: operating current above rating. Solution: reduce current or use parts with lower DCR and appropriate current rating.
• Poor signal quality — Cause: low Q or unsuitable frequency. Solution: choose high‑Q SMD air inductors with suitable SRF.
• EMI interference — Cause: inadequate PCB layout or component proximity. Solution: increase spacing, improve grounding and PCB layout.
• Frequency shift — Cause: parasitic capacitance or tolerance stacking. Solution: verify resonance calculations and tolerances.
• Soldering defects / open circuit — Cause: incorrect reflow profile or mechanical damage. Solution: inspect solder joints and use correct SMT reflow parameters; handle parts carefully.

FAQ (selected)

• What is an SMD air coil inductor? — A surface‑mount, wire‑wound inductor with an air core (no magnetic material), optimized for high‑frequency RF use.
• Why prefer air core vs ferrite core? — Air core inductors do not saturate, have no core losses and offer higher Q and better high‑frequency behavior.
• How to calculate current rating? — For air cores, current rating is limited by allowable temperature rise; consider winding and thermal management in the design.
• Can an SMD air core inductor be used in a DC‑DC converter? — Typically no; DC‑DC converters require larger inductance and energy storage than typical SMD air inductors provide.

How to choose
Consider required inductance, operating frequency (ensure SRF ≫ operating frequency), Q‑factor, current rating, DCR, package size for PCB assembly, temperature stability, tolerance and regulatory criteria (RoHS/REACH).

Characteristics / Technical specifications

• Series / Model reference: WL610
• Core material: Air (non‑magnetic)
• Conductor: Enameled copper wire
• Wire diameter: 0.1 mm (AWG options available)
• Inductance range: 0.1 µH – 100 µH (customizable)
• Inductance tolerance: ±2%, ±5%, ±10%
• Operating frequency: kHz to MHz range
• Self‑resonant frequency: High (application dependent)
• Q factor: High, optimized per frequency range
• DC resistance (DCR): Custom
• Rated current: Custom per design
• Insulation resistance: ≥100 MΩ
• Footprint length: 10–15 mm
• Encapsulation options: Varnish, epoxy or coating (optional)
• Mounting: Through‑hole / Custom (SMT packaging available)