Perfluoroisobutyronitrile (C4F7N) is a new type environmentally friendly insulating and arc quenching gas that used for sustainable alternative sulfur hexafluoride (SF6). As insulating and arc quenching gas, perfluoroisobutyronitrile has many key features and benefits, such as 0 ODP and very low GWP, excellent dielectric and arc quenching properties, Compatible with equipment components, Non-flammable, low toxicity, etc..