Amorphous Cores

Amorphous C-Cores from Bunting are ideal for single phase and three-phase reactors and output chokes. They offer up to 50% more energy compared with alternative materials such as ferrites, Sendust and silicon steel – allowing performance and efficiency to be enhanced without increasing the size of the system, or size to be reduced without compromising performance. Amorphous C-Cores are manufactured using an ultra-thin ribbon casting process that greatly reduces unwanted eddy current losses at higher frequencies. The non-crystalline amorphous structure of the iron-based ribbon helps ensure minimum magnetic reversal losses. The cores are ideal for the growing number of high frequency power conditioning applications.

C Core3


  • Power Transformers
  • Output Chokes
  • DMC
  • PFC
  • Medium-Frequency Transformers


  • Switch mode power supply
  • Invertors
  • Reactors
  • Power Factor Correction
  • Solid State Distribution Transformers
  • Electromagnetic Shielding

Typical Electromagnetic Performance Curve for Amorphous Cores

The following technical data… if you need further engineering assistance then please contact our Technical Department

Relative change of µ vs temperature

Amorphous - Relative change of µ vs temperature

Permeability Curve with Frequency of Amorphous CACC Cores

Permeability Curve

The DC-Bias Curve of Amorphous CACC Cores

DC Bias of Amorphous CACC Cores

The B-H Curve and µ-H Curve of Amorphous CACC Cores

BH Curve

Amorphous realtive change of Bs VS Temperature


Iron-based Amorphous Cacc Series Core Loss Curve


Amorphous Core Technical Data

Amorphous Core Technical Data

You can Download a copy of the 'Amorphous Core - Techincal Data Sheet' here:

Need Engineering Assistance?

Most of our customers often need a bit of help with selection, please contact us and our engineering staff can assist. Development quantities are available.