Why is G10 Material Good for Electrical Insulation?

G10 is a fiberglass sheet laminate, a kind of composite material created by stacking multiple layers of glass cloth, soaked in epoxy resin, and then compressing the resulting material under heat until cured. It is made in flat sheets, channels and angles. G10 is very similar to carbon fiber and other high tech fiber epoxy laminates, because they are all resin-based laminates. G-10 is the toughest glass fiber resin laminate and therefore the most commonly used. It is sometimes known as Garolite or Glastic insulator.

G10 plastic is specified for its extremely high strength and high dimensional stability over a wide temperature and humidity conditions. It is used for electrical insulator materials, terminal boards, busebar insulation, electronic test equipment and electric motor rotor insulation. It was first used for printed circuit boards, and its designation, G10, comes from a National Electrical Manufacturers Association standard for this purpose.