insulation coating C3 C5

C3 and C5 insulation coatings are used on electrical steel laminations to stop current flow between layers. These coatings create a thin insulating film on the steel surface. As a result, eddy current loss drops and heat generation becomes lower. C3 coating offers good insulation and easy stamping performance. C5 coating provides higher resistance and better heat stability for high speed motors. Both coatings protect the core from corrosion and improve stacking quality. Proper coating choice helps increase motor efficiency, extend service life, and support EV motors, industrial drives, generators, and high performance electric machines.