High frequency litz wire

High frequency litz wire is either used for frequency or heating-related applications. Ultra fine litz wires provide solutions for both technologies regardless of frequency or impedance range. Electrical, mechanical and cost aspects need to be considered carefully during the design phase.


Benefits of litz wire for high frequency applicationsApplications                                                       

• Cost-effective design

• RF transformers

• Resistance or frequency-related construction

• Chokes

• Increased tensile strength by using additional strain relief

• Medical application

• Sensors

• Ballasts

Benefits of litz wire for heating applications

• Switching power supplies

• Resistance wires for heating applications

• Precise resistance-related manufacturing


• Very broad field of application (drying, heating, warming up)

• Resilient base materials


Properties of litz wires


For high frequency


For heating


Tensile strengthlow - mediumhigh
Looping behaviorlowhigh
Bending cycle behaviorhighhigh


Construction of high frequency applications

The construction of a litz wire product depends upon the number of individual wire strands and the diameter of each wire. In general, our process can bunch a maximum of 60 individual wire strands in one operation. Litz wire constructions requiring more than 60 strands must be produced in multiple operations using sub-bundles twisted together. Example: Litz wire of 600 strands of 0.10 mm conductor could be construed using 24 x 5 x 5 x 0.10 mm.

Typical connection technologies are soldering, thermal compression welding, ultrasound welding, resistance welding and flame brazing.

    Typical length of lay  
Diameter of single wires                                 0.010-0.500                                  mm   Single-stage:  2 - 26 mm
Number of single wires                                       2-25,000                                    pcs          Multi-stage:   20 - 60mm
Outer diameter of litz wires                               0,095-10.0                                  mm       



Connecting Technologies                    

High frequency





Thermal compression welding


Flame brazing

Resistance welding


                Selection criteria for lengths of lay


                 • Larger length of lay enables lower cost

                 • Smaller length of lay increases the physical stiffness

                 • Smaller length of lay reduces the splicing 

                    behaviour and supports the round shape 







 "Details Connection Technologies for Litz Wires"