Air core inductor WL3049

high-frequencyRFthrough-hole type

Product Overview
A compact flat copper coil WL3049 made from enameled flat-ribbon copper for use in high-frequency and space-constrained industrial applications. The flat conductor geometry reduces AC resistance and improves thermal dissipation compared to round-wire coils.

Key Uses and Applications
Used in wireless power transfer, power electronics, automotive power systems, medical electronics and industrial automation where low profile and high power density are required.

Compact Flat Copper Coil — Product Details
Available in custom sizes and inductance values. Typical construction: enameled flat/ribbon copper, single-layer or sectional winding, air core. Mounting options include through-hole or custom fixtures. Encapsulation and coating options available.

Product Video Presentation
A technical video is available showing typical designs, manufacturing notes and application examples for integration and testing.

How Does a Flat Copper Coil Work?
The coil operates by electromagnetic induction. The flat ribbon conductor increases surface area, reducing skin-effect losses at kHz–MHz frequencies and enabling efficient energy transfer for inductors and inductive power components.

Characteristics and Advantages
Flat copper coils provide compact form factor, lower DC resistance and improved heat dissipation. They are suited to automated manufacturing and high-frequency switching environments.

Typical Applications

• Wireless charging systems (consumer devices, EV wireless chargers)
• Power electronics: DC-DC converters, inverters, high-frequency transformers
• Automotive electronics: on-board chargers, BMS, EV power systems
• Medical electronics: imaging, monitoring, therapeutic devices
• Industrial automation: sensors, control modules, robotics

Advantages & Disadvantages
Advantages:

• Lower DC resistance and higher current capacity
• Improved thermal dissipation and reduced AC losses
• Compact profile for space-constrained installations
• High manufacturability with precision winding methods

Disadvantages / Limitations:

• More complex and costlier manufacturing than round-wire coils
• Reduced conductor flexibility for some geometries
• Requires specialized winding/forming equipment and careful electromagnetic design

Troubleshooting & Typical Failures
Common checks include:

• Minimal inductance: verify winding integrity and design
• Overheating: check operating current, cooling and encapsulation
• Lower efficiency: inspect connections and possible oxidation
• Open circuit: test continuity and solder joints
• Short circuit: inspect insulation between turns
• EMI issues: evaluate shielding and component spacing

Compact Flat Copper Coil Data Sheet
Model identifier: WL3049
Conductor: enameled flat/ribbon copper
Wire diameter example: 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 / custom

Electrical Specifications (Typical)
Inductance range: 0.1 µH – 100 µH (customizable)
Inductance tolerance: ±2%, ±5%, ±10%
DC resistance (example): 14 Ω with 5.5 turns
Q factor: high, frequency-optimized
Self-resonant frequency: application-dependent
Operating frequency: kHz to MHz range
Rated current: per design
Insulation resistance: ≥100 MΩ

Applications Summary
Suitable for consumer electronics, EV and automotive power systems, renewable energy converters, medical devices, RFID and wireless communication hardware, aerospace and industrial sensors.

Technical characteristics / specifications

• Model identifier: WL3049
• Conductor: flat / ribbon copper (enameled)
• Example wire diameter: 0.20 mm
• Footprint length: 15 mm
• Winding type: single-layer or sectional
• Core: air
• Encapsulation: varnish, epoxy or coating
• Mounting: through-hole or custom
• Inductance: 0.1 µH – 100 µH
• Tolerances: ±2%, ±5%, ±10%
• Typical DCR: 14 Ω (5.5 turns)
• Operating frequency: kHz–MHz
• Insulation resistance: ≥100 MΩ