T60006 Nanocrystalline VITROPERM Alloy Core Vacuumschmelze (VAC) T60006 Nanocrystalline VITROPERM Alloy Core is designed for the residential Ground Fault Circuit Interrupter (GFCI) market to be used with On Semiconductor's NCS37010. High permeability nanocrystalline cores enable very high inductance levels in extremely compact core or choke dimensions.