MuMETAL® Toroidal Cores

Please contact us for design input and recommendations
Custom Sizes Available:
Specify your diameter / height ratio and design configuration. Select CUSTOM Size option below. Please allow 8-10 weeks for custom MuMETAL® Toroidal Cores


Magnetic Shield Corporation supplies custom tape-wound, MuMETAL® Toroidal Cores to industries requiring High Metering Accuracy (HMA) current transformer cores. By using our proprietary brand of MuMETAL® and properly heat treating in a controlled hydrogen atmosphere furnace, (to a soft magnetic anneal) we maintain close control of the magnetic properties over a broad range of flux densities which permits the most economical and efficient design of your transformer.

We offer a range of custom wound cores from minimum 1.00 in / 25,0 mm inside diameter to maximum 47.25 in / 1200 mm outside diameter, using MuMETAL® foil thicknesses ranging between 0.004 in / 0,10 mm and 0.014 in / 0,36 mm. Core height is available from 0.20 in to 2.00 in / 5,0 mm to 50,0 mm.

Custom Sizes or Configurations: Select CUSTOM Size option to specify your requirements. Include your drawing or sketch if available.

For technical consulting and design input, please contact our Engineering & Technical Services Team.