3M™ ThermaVolt AR Electrical Insulation Paper


3M™ ThermaVolt AR Electrical Insulation Paper

3M™ ThermaVolt AR Electrical Insulation Paper combines the best of two technologies – inorganic and aramid – to offer the excellent thermal conductivity and voltage endurance of inorganic insulation plus the strong mechanical and thermal properties you expect of aramid insulation.

3M™ ThermaVolt AR (TVAR) Electrical Insulation Paper is a significant advancement in the development of electrical insulation used in electrical equipment, such as dry type transformers and motors. This premium-performance insulation is a cost-effective alternative to higher temperature insulation materials.



  • Toughness: tensile strength and tear resistance, even in single-ply form
  • Dielectric strength
  • Conformability
  • Long-term thermal stability
  • High thermal conductivity
  • Retains electrical strength even at operating temperatures
  • Approved for use in Electrical Insulation Systems rated through Class 220°C per UL 1446

Typical Applications: 

  • Core wrap
  • Turn insulation
  • Interwinding insulation
  • Layer insulation
  • Outer wrap insulation
  • Window insulation