C-Core Magnetic Cores

Strip-wound magnetic cores for transformers and chokes

C-Core Magnetic Cores for Maximum Efficiency and Highest Power Density

C-core magnetic cores are among the most efficient core designs for transformers, chokes, and inductive components. Their strip-wound construction enables a nearly closed magnetic circuit, reduces remagnetization losses, and ensures high magnetic power density in a compact design.

MST develops and supplies C-core magnetic cores both as standard designs and as custom solutions. We work with you to select the appropriate core material, the optimal geometry, and the required air gap—precisely tailored to your application. This results in high-performance magnetic circuits for energy, industrial, and automation technology.

 

What is a C-core magnetic core?

A C-core consists of a continuously wound strip of high-quality electrical steel or special alloys. After the winding process, the core is precisely cut to create two identical C-shaped core halves. When joined together, these form a nearly closed magnetic circuit.

This design significantly reduces magnetic leakage losses and enables a particularly efficient magnetic flux path. At the same time, defined air gaps can be easily integrated, making C-core magnetic cores ideal for transformers, chokes, and inductive components.

Compared to conventional EI-shaped laminated cores, magnetization losses are significantly lower. This not only improves efficiency but also often extends the service life of the entire system.

C-core magnetic cores are used today in nearly all areas of modern electrical engineering. Typical applications include:

  • Power transformers

    Efficient magnetic cores for high-performance, low-loss transformers.
  • Current Transformers

    Precise magnetic properties for reliable current measurements.
  • Chokes

    Optimal inductance and low losses for modern choke applications.
  • Chargers

    Compact and energy-efficient solutions for modern charging systems.
  • Inverters

    High power density for efficient energy conversion.
  • Power Supply

    Reliable magnetic cores for stable and efficient power grids.
  • Industrial Automation

    Rugged components for demanding automation processes.
  • Testing Technology

    Precision magnetic cores for reliable measurement and testing systems.

Core Materials for Different Requirements

Choosing the right core material has a significant impact on a magnetic core’s performance. That is why MST assists its customers right from the start in selecting the optimal material.

Grain-oriented electrical steel

The classic material for transformers in the power-frequency range offers low losses and high magnetic permeability.

Non-grain-oriented electrical steel

Ideal for applications with varying magnetization directions or specific requirements regarding isotropic magnetic properties.

Amorphous materials

Amorphous metal strips have extremely low remagnetization losses and are ideal for energy-efficient transformers.

Nanocrystalline materials

Nanocrystalline cores offer the highest permeability combined with very low core losses and are used in particular in modern switching power supplies, EMC filters, and high-frequency applications.

Quality You Can Rely On

Our C-Core magnetic cores are manufactured to the highest quality standards. Precise machining processes, high-quality materials, and meticulous quality control ensure reproducible magnetic properties and high process reliability.

From custom-made parts to mass production, MST delivers consistently high quality and reliable delivery.

  • Technical consulting by experienced engineers

    Expert support for your application.
  • Support starting in the development phase

    Working together to find the optimal solution.
  • Standard and custom solutions from a single source

    Custom-fit magnetic cores for every requirement.
  • From prototypes to mass production

    From single units to large-scale production.
  • International industrial projects

    Experience in global customer projects.
  • Custom core geometries and air gaps

    Precisely tailored to your application.
  • High manufacturing quality

    Precisely manufactured, reliable in operation.
  • Personal contacts

    Direct contact instead of a hotline.

Your application. Our magnetic solution.

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    Frequently Asked Questions About C-Core Magnetic Cores

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