IEEE thermal rating

Performance is based on tests appropriate to the application. Perhaps the most widely used set of IEEE thermal ratings are those used in the magnet wire industry. The IEEE thermal classes are 105°C, 130°C, 155°C, 200°C, and 220°C. IEEE magnet wire standards are described in Appendix D. 

See also electronic plastic glass transition temperature heat distortion point IEEE thermal ratings continuous-use temperature. 

TF,F,F, thermal rating A system of thermal ratings has been established by TF,F,F, institute of Electrical and Electronic Engineers) as standards for the insulation and polymeric materials that are used in the electrical and electronic industries. In these ratings, materials must have been proven, by IEEE tests, to perform reliably, with minimal electrical property changes and material thermal degradation, for set time periods (thousands of hours of operation). 

Insulation systems are divided into classes according to the thermal endurance of the system for temperature rating purposes. Four classes of insulation systems are used in motors and generators, namely, classes A, B, F, and H. These classes have been established in accordance with IEEE Std. I. 

Wong CP, Vincent MB, Shi S. East-flow underfill encapsulant flow rate and coefficient of thermal expansion, IEEE Transactions on Components. Packaging, and Manufacturing Technology - Part A June 1998 Vol. 21(No. 2). 

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