Litz Wire Types and Constructions | New England Wire Technologies

New England Wire Technologies is a pioneer and leading designer and manufacturer of Litz wire and specialty winding wire. Litz wire conductors are beneficial for reducing A.C. losses in high frequency windings. New England Wire Technologies offers many Litz wire constructions with multiple layers of insulation to meet the voltage—withstand requirements of UL and IEC. Multiple extruded layers of fluoropolymers, such as FEP, PFA, and ETFE are most often utilized. These extrusions are offered in different colors so that the different layers are easily distinguishable.

Various tape wraps, such as polyimide and polyester are available for applications requiring greater cut-through resistance and minimum diameter. These products, most commonly used in power conversion equipment, are desirable in any application requiring additional voltage-withstand between windings.

Listed below are descriptions of each type of Litz wire. Please contact our technical sales staff to discuss your specific requirements and custom options


Litz Wire Type 1 custom

    Type 1 Litz Wire

    Single film-insulated wire strand, twisted with optional outer insulation of textile yarn, tape or extruded compounds.
Litz Wire Type 2

    Type 2 Litz Wire

    Bundles of Type 1 Litz wire twisted together with optional outer insulation of textile yarn, tape or extruded compounds.
Litz Wire Type 3

    Type 3 Litz Wire

    Bundles of Type 2 insulated Litz wire twisted together with optional outer insulation of textile yarn, tape or extruded compounds.
Litz Wire Type 4

    Type 4 Litz Wire

    Bundles of Type 2 Litz wire twisted around a central fiber core with optional outer insulation of textile yarn, tape or extruded compounds.
Litz Wire Type 5

    Type 5 Litz Wire

    Insulated bundles of Type 2 Litz wire twisted around a fiber core with optional outer insulation of textile yarn, tape or extruded compounds.
Litz Wire Type 6

    Type 6 Litz Wire

    Insulated bundles of Type 4 Litz wire twisted around a fiber core with optional outer insulation of textile yarn, tape or extruded compounds.
Litz Wire Type 7
    Type 7 Litz Wire Film-insulated wire braided and formed into a rectangular profile with optional outer insulation of textile yarn, tape or extruded compounds.
Litz Wire Type 8
    Type 8 Litz Wire Compacted film-insulated wires or groups of compacted film-insulated wires twisted and compressed into a rectangular profile with outer insulation of textile yarn, tape or extruded compounds

Many Litz wire constructions are available with multiple layers of insulation to meet voltage-withstand requirements of UL and IEC. Multiple extruded layers of fluoropolymers such as FEP, PFA and ETFE are most common. These extrusions are offered in different colors so that the different layers are easily distinguishable.  Various tape wraps such as polyimide and polyester are available for applications requiring greater cut-through resistance and minimum diameter. These products, most commonly used in power conversion equipment, are desirable in any application requiring additional voltage withstand between windings.

All of the insulations available for complex bundles are also available over single-strand bare, tinned and silver-plated copper as well as various copper alloys and magnet wires.