Litz Wire Products - Types of Manufacturing & Insulation Material

Litz wire

Depending on the frequency range, thermal class, electrical and mechanical requirements, Metalitz can manufacture various types of litz wires and litz cables by using appropriate raw materials for conductor and insulation.

Owing to the diversified range of applications and required uniqueness for every application, standards are specifically referred in context to the raw material used rather than the complete litz wire.

The Litz wires are made with conductors or magnet wires which are individually insulated from each other. As required by the different applications, magnet wires insulated with polyurethane, polyurethane-nylon, solderable polyester, solderable polyester-nylon, polyester/polyamide-imide, and polyimide are used.

The litz wire can also be provided with additional outer insulations which may be servings of polyester, nylon, silk, cotton, or fiberglass. Polyester, aramid/nomex, polyimide/kapton, and PTFE tape wraps or extruded insulation of ETFE, FEP, PFA, Silicone, etc. are also available as outer insulation in case the application demands for voltage breakdown, mechanical or environmental protection.

Litz Wire Manufacturing Range

Litz Wire Specifications:

Conductor	Conductor Material	Bare, Tinned plated, Silver plated, Enamelled plated copper wire
	Wire Size	0.04-0.400mm
	Cross Sectional area of litz wire	Min 0.05 sq. mm
		Max 25 sq. mm
	No. of wires	Min 3 wires
		Max up to several thousand
Insulation	Insulation over conductor	Enamel Insulation	Solderable and Non-solderable type with a temperature class of 155, 180, 200, 220
	Outer Insulation	Yarn Serving	Nylon, Silk
		Taping	Polyster, Nomex, Mica, Kapton, Fibre glass, etc
		Extruded	Silicon, PTFE, ETFE, PFA, FEP, PVC

Insulation material for litz wires

Type of Enamel Insulation on individual wire as per IEC, MW specifications

Sr. No.	Type of Enamel	Maximum Temperature (°C)	Features
1	Polyurethane modified	155, 180	Self-Solderable, Good Flexibility, Better Moisture Resistance
2	Polyster-imide modified	180	Good Electrical Properties
3	Polyster-imide modified + Polyamide-imide	200	High Temperature, Better Dielectric Values
4	Polyamide-imide	220	Better Thermal Properties

Types of Outer Insulation for Litz Wires – Yarn Serving

Type of Yarn	Maximum Temperature (°C)	Features
Cotton	105	Low cost
		Good abrasion resistance
Nylon	155	Excellent abrasion resistance
		Solderable
		Better space factor

Type of Outer Insulation for Litz Wires – Taping

Sr. No.	Tape Material	Maximum Temperature (°C)	Features
1	Polyester (PET)	130	High dielectric strength, Good abrasion resistance
2	Nomex	220	Excellent thermal properties, Excellent electrical properties, Good abrasion resistance
3	Polyimide (Kapton)	240	Very Good chemical resistance, Excellent mechanical properties
4	Fibre Glass	Temperature determined by application and glass type	Excellent electrical properties, Excellent solvent resistance

Types of Outer Insulation for Litz wires – Extruded:

Sr. No.	Extrusion Material	Maximum Temperature (°C)	Features
1	Ethylene tetrafluoroethylene (ETFE)	150	Good winding characteristics, Better at tight bend than other fluropolymers, Excellent heat resistance, Excellent water / chemical resistance
2	Fluorinated Ethylene Propylene (FEP)	200	Excellent heat resistance, Outstanding water / chemical resistance, Outstanding flame retardancy, Low outgas
3	Perfluoroalkoxy alkane (PFA)	250	Excellent heat resistance, Outstanding water / chemical resistance, Outstanding flame retardancy, Low outgas
4	Silicone	200	Outstanding flexibility, Outstanding heat resistance, Medical grades
5	Polyvinyl chloride or vinyl (PVC)	105	Least expensive, Excellent flame resistance, Excellent flexibility, Medical grades

Industries We Serve - Aerospace, Medical, Power & Energy, Railways

Aerospace Technology

Medical Equipments

Electric Vehicles

Railway Technology

Renewable Energy

Induction Heating

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About Us

Founded by first generation entrepreneurs, Metalitz offers full range of Litz wires to segments like Automotive, Medical, Railways, Renewable Energy Etc.