Pressed Litz Wires

Pressed Litz Wires

Pressed litz wire allow optimal utilization of available winding area due to the superior filling factor. In comparison to a standard round cross section construction, profiled litz wire can increase the filling factor by up to 20%.

Types of Pressed Litz Wire 

  • Round Litz Wires
  • Rectangular Litz Wire
  • Square Litz Wire

W.R.T Frequency Range

Frequency Individual Strand Diameter
1.5 MHz-2.8 MHz 0.032 mm
850 kHz-1.5 MHz 0.040 mm
500 kHz-850 kHz 0.050 mm
250 kHz-500 kHz 0.063 mm
100 kHz-250 kHz 0.071 mm
50 kHz-100 kHz 0.100 mm
20 kHz-50 kHz 0.125 mm
10 kHz – 20 kHz 0.200 mm
1 kHz-10 kHz 0.250 mm
50 Hz-1 Hz 0.250 mm

W.R.T Product Range

Specification Range
Cross-sectional Area 0.1 MM2-400 MM2
Diameter of single strand 0.04 MM-2.52 MM
Direction of lay S/Z
Width of litz Up to 25 mm
Thickness of Litz Up to 20 mm

Type Of Insulation

Insulation Type Temperature Class Features
Polyimide – imide 220°C – Better thermal properties.
Polyimide-imide modified 180°C – Good electrical properties.
Polyester-imide modified
+ Polyimide – imide
200°C – High temperature/Better dielectric values/ Better moisture
Polyimide 240°C – Better flexibility/Better chemical compatibility/ High
dielectric values.
Polyurethane modified 155 to 180 – Solderable/Good flexibility/ Better moisture
Cotton 105°C – Low cost/Good abrasion resistance.
Cellulosic Papers (Kraft paper/Crepe Paper) 120°C – Better electrical values / Better bending values for crepe
Polyester (PET) 130°C High dielectric strength / Good abrasion resistance
Nomex 200°C (Up to 220°C under certain conditions – High inherent dielectric strength/Mechanical toughness /
Thermal stability
Polyimide Kapton® 240°C
(Up to 400°C under certain conditions
– high performance / Heat resistant/ Good adhesion
properties /Low outgassing under vacuum.
Fiber Glass Temperature class will depends on the Application and type
of Glass
– Excellent electrical properties at high temperature /
Excellent solvent resistance
Mica Temperature class will depend on the Application Highly flexible and easy to wind, which provides good
adhesion with coils excellent electrical insulation properties including corona
resistance/Excellent heat resistance, which also allows for use in high heat resistance
Silicon (Exclusion) 220°C  – Highly flexible and easy to bend, excellent for indoor and
outdoor application. Provides good resistance to oil, grease, water etc. Excellent heat
resistance, which also allows for use in high speed and high frequency