Rea Magnet Wire NanoShield SD, HTAI NS, thermal class is 200 °C, is inverter duty wire that offers substantial insulation protection against transient spikes, high frequencies, elevated voltage levels and short rise time pulses without increasing insulation thickness. - NanoShield SD offers exceptional resistance to voltage stresses generated by high frequency, rapid rise time, voltage spikes typically introduced by IGBT-type inverters. Motor life is increased significantly over standard MW-35C magnet wire under these voltage stresses and across a wide temperature range.