TAK toroidal cores are supplied with epoxy and parylene insulation coating, Eopxy coating parts can withstand a minimum breakdown voltage 1000Vrms, uniformail applied across the C dimension of the core

Toroids with an outside diameter of 9.5mm or larger can be supplied with a uniform coating of a epoxy coating. This coating will increase the A and D dimensions and decrease the C dimension a maximum of 0.4mm

Toroids with an outside diameter of 9.5mm or smaller can be supplied tieh parylene coating. This coating will incresase the A and D dimensions and decrease the C dimension a maximum of 0.04mm