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Common Mode Choke Guide

Common mode chokes are essential components used in electronic circuits to suppress electromagnetic interference (EMI) and improve signal integrity. This guide provides an overview of iNRCORE’s common mode choke offerings, their applications, and key considerations for selection.

View our Common Mode Chokes

What is a Common Mode Choke?

A common mode choke is an inductor designed to block high-frequency noise while allowing the desired signal to pass through. It consists of two coils wound on a magnetic core, which are connected in series with the line and neutral conductors of a circuit. This configuration helps to cancel out common mode noise while allowing differential signals to flow.

Key Functions of Common Mode Chokes

  • Noise Suppression: Reduces electromagnetic interference (EMI) from external sources.
  • Signal Integrity: Maintains the quality of the desired signal by filtering out unwanted noise.
  • Differential Signal Handling: Allows differential signals to pass while blocking common mode noise.

Applications

Common mode chokes are widely used across various industries and applications:

  • Power Supplies
  • Telecommunications
  • Industrial Equipment
  • Automotive Applications
  • Consumer Electronics

Key Features of iNRCORE's Common Mode Chokes

iNRCORE offers a range of common mode chokes designed for various applications:

  1. Wide Frequency Range: Suitable for operation from 100 kHz to over 600 kHz, making them ideal for GaN-based power supplies and traditional switching supplies.
  2. High Temperature Range: Designed to operate in extreme environments with temperature ratings from -55°C to 200°C.
  3. Compact Design: Low-profile construction suitable for automatic placement and high shock and vibration applications.
  4. Electrical Values: Available in different inductance values ranging from 110 µH to 4.9 mH, with current ratings from 0.55 A to 4.9 A.
  5. Self-Shielding Toroidal Core: Provides better performance in a smaller package size compared to competitors.

Selecting the Right Common Mode Choke

When choosing a common mode choke for your application, consider the following factors:

  1. Inductance Value: Select an inductance value that effectively suppresses the specific frequency range of unwanted noise while allowing desired signals to pass.
  2. Current Rating: Ensure the choke can handle the maximum current expected in your application without saturating.
  3. Operating Temperature Range: Choose a choke that can operate reliably within the temperature conditions of your application environment.
  4. Size Constraints: Consider the physical size of the choke, especially for compact designs where space is limited.
  5. Mounting Type: Determine whether you need surface mount or through-hole options based on your PCB design requirements.

iNRCORE's Common Mode Choke Product Line

iNRCORE provides a diverse range of common mode chokes tailored for various applications:

Conclusion

iNRCORE’s common mode chokes provide effective solutions for noise suppression and signal integrity enhancement across various applications. With their robust design, high-temperature ratings, and compact size, our common mode chokes are ideal for use in demanding environments.

For assistance in selecting the right common mode choke for your application or to discuss custom solutions, please contact our experienced sales and engineering team. We are committed to helping you optimize your designs for peak performance and reliability.

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Custom Design Services

iNRCORE excels in creating application-specific designs for unique requirements. Our extensive capabilities in design, development, production, and testing allow us to deliver tailored solutions that meet your specific needs.

For questions about our application notes or to discuss custom products, please contact our team of experts. We’re here to help you find the perfect solution for your electronic component needs

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