The 0077930A7 is a toroid core manufactured using KOOL MU material in a 125 perm
Kool Mu material’s low loss and relatively high saturation level (10,500 gauss) make it excellent for use in power factor correction circuits (PFC) as well as unidirectional drive applications. The near zero magnetostriction makes Kool Mu (sendust) ideal for eliminating audible frequency noise in In-Line Noise Filters and Inductors.