Wire Type: Single Build, Unserved Litz Wire (0.090" O.D.) Stranding: 5 bundles of 52 strands of 38 AWG (5/52/38) Insulation Material: Solderable Polyurethane with Polyamide Overcoat (Red) NEMA Grade: MW 80-C (Temp. Rating 155°C / 311°F) Ideal Operating Frequency: Approx. 100 kHz Litz wire is made up of individually-insulated strands of magnet wire that are twisted together in a specific pattern. This unique construction mitigates skin and/or proximity effects and lends to fewer losses in high frequency applications. As such, litz wire is ideal for switch-mode power supplies, high Q coils, and many other specialized applications that require minimal losses at higher frequencies (e.g. aviation, medical, laboratory, and communication uses). The magnet wire used to construct this litz wire is drawn to meet specific size requirements based on the National Electrical Manufacturers Association (NEMA) standards. Additionally, this wire meets the NEMA MW 80-C standard for operating temperature (155°C / 311°F) and insulation makeup.