Triple Insulated Winding Wires

Class F heat-resistant triple insulated winding wire

Reinforced insulated wire with tape winding coating that satisfies the heat resistance requirements of Class F (155°C).

In addition to tape-wrapped coatings, extruded coating types are available.Ideal for downsizing transformers used in power equipment.The self-fusion type is bobbinless and can be automated for coil winding.


  • The product has a narrow outer diameter.
  • It is possible to reliably isolate the primary and secondary sides of the transformer.
  • No need for barriers, interlayer tape, or insulation tape.
  • It has a coating strength that can withstand high-speed winding.
  • The extruded type has excellent voltage resistance against corona discharge.
Features of triple-layer insulated wire


In addition to switching power supplies and AC adapters that are widely used in industrial and consumer equipment, the extrusion type is also suitable for automotive and medical power supplies.

  • Mobile phone charger
  • automotive inverter
  • Switching power supply for medical equipment


Structure of TIW

With a three-layer insulation structure, it is positioned as a reinforced insulated wire in terms of safety standards.

Conductor composition
  • Single line
  • litz wire
  • compression stranded wire
  • Stranded wire for high frequency

Product catalog

For more information on triple-layer insulated wires, please download the catalog below.

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