MuMETAL® Toroidal Cores

Usually Ships Within 24 Hours.
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 standard wound cores from minimum 0.50 in / 12,7 mm outside diameter to maximum 3.0 in / 76.2 mm outside diameter, using MuMETAL® foil thicknesses 0.008 in / 0,20 mm.  Core height is available from 0.25 in to 0.50 in / 6,35 mm to 12,7 mm. All cores are supplied bare without any casing or coatings. 

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.