Tape wound cores are key components in transformers, amplifiers, filters, and other complex electronic circuitry assemblies. Due to their reliability, they are commonly used in critical applications, such as those found in the aerospace, communications, military, e-vehicles, Smart Grid, mining, and nuclear industries. 

Generally made from thin strips of soft magnetic materials, cores are available in various shapes, weights, and material thicknesses to suit different frequency, flux densities, and other requirements. The MK Magnetics team will work with you to meet your specifications by combining innovative engineering with access to cutting-edge materials typically used in the manufacture of tape wound cores. These materials may include:

• Nanocrystalline materials: These polycrystalline materials are made from crystallites that are a few nanometers in size (typically less than 100 nm). Cores made from them generally offer high permeability and saturation and very low power loss. 
• Amorphous metals: Amorphous metals have a disordered atomic microstructure. It is non-crystalline and glass-like. Cores made from them have excellent magnetic properties, including high permeability, high saturation magnetic flux density, and low power loss. 
• 3% grain-oriented and 6.5% non-oriented silicon steel: Silicon steels are available in two forms: grain-oriented and non-oriented. Grain-oriented silicon steels have magnetic properties developed in the rolling direction, while non-oriented silicon steels have magnetic properties that are similar in all directions. High saturation magnetic flux density and low cost combine to make this a good choice in many applications. 
• 50% and 80% nickel alloys: These alloys offer some of the best soft magnetic properties, making them well-suited for use in amplifiers, inductors, transformers, and other magnetics-based devices. 
• Supermendur®: This cobalt-iron material has high flux density and low core loss, making it suitable for use in chokes and transformers when size and mass are important, such as in the aerospace industry. 
• & many other highly specialized materials!

Another key advantage of working with us is our flexible manufacturing capabilities. We can build cores that are between 0.002 to 4,000 lbs. in weight and up to 7.5 ft. (height) by 4 ft. (width) in size, depending on overall geometry. They can be configured as C-, E-, D-cores, pie-type, cased and uncased toroid, bars, and a variety of custom shapes. We also have the freedom and expertise to develop custom processes to accommodate virtually any core design with no restriction on volume. This is a comprehensive offering and is backed up by a robust quality program and a full range of in-house testing capabilities, ensuring compliance with various industrial standards. Our team can typically begin delivering in three to five weeks. Expedited deliveries are available.

We can design and manufacture a broad selection of standard and custom soft magnetic core products. 

Magnetic cores are components made from magnetic materials that are designed to contain and control magnetic fields in electrical, electromechanical, and magnetic devices. We make the following types of cores: tape wound cores, cut C-cores (single-phase), cut E-cores (three-phase), toroids, multiple cut cores, epoxy-coated cores, and Optifficient cores. 

Toroids are magnetic cores with a toroidal shape (i.e., a circular ring). This unique shape allows for shorter coils, lower resistive or windings losses, and better overall efficiency in electrical and electronic circuitry assemblies. We offer them in cased, uncased, gapped, and other variations. 

In addition to supplying magnetic core components, we also manufacture stacked and custom assemblies.