Uploaded December 2025 | Updated September 2026, 2 weeks ago
Selecting the right common mode choke (CMC) can make or break your EMI suppression strategy, but it’s easy to fall into common traps. In this episode of "Common Pitfalls of the Common Mode Choke," we highlight the errors most often made during CMC selection, such as focusing only on inductance or overlooking the importance of core material and geometry. You’ll learn the practical differences between inductance and impedance, how construction affects performance, and a straightforward workflow for choosing the best CMC for your application. To view the datasheets or order samples, visit Würth Elektronik online or visit the MyWE customer portal.
Würth Elektronik online: we-online.com
Listen to our PODCAST🎙️: we-online.com/en/news-center/podcast
Follow us on LinkedIn: linkedin.com/company/wurth-elektronik (Americas)
Follow us on LinkedIn: linkedin.com/company/wuerth-elektronik-group (Europe)
Like us on Facebook: facebook.com/WurthElectronics (Americas)
Like us on Facebook: facebook.com/Wuerth.Elektronik.Group (Europe)
Follow us on X: https://x.com/WurthElectronic/ (Americas)
Follow us on X: https://x.com/we_online (Europe)
Follow us on Instagram: instagram.com/wurthelectronics (Americas)
Timestamps:
00:00 Introduction
00:44 Music Intro
01:35 The Misconception of Inductance Vs. Impedance
02:52 Why Core Material Matters
04:10 Core Geometry and Winding Style
05:50 Current Imbalance and Saturation
07:15 A Simple Workflow for Selecting a Power-Line Common Mode Choke
08:20 Closing Remarks and a Recap of this Podcast Episode
Selecting the right common mode choke (CMC) can make or break your EMI suppression strategy, but it’s easy to fall into common traps. In this episode of "Common Pitfalls of the Common Mode Choke," we highlight the errors most often made during CMC selection, such as focusing only on inductance or overlooking the importance of core material and geometry. You’ll learn the practical differences between inductance and impedance, how construction affects performance, and a straightforward workflow for choosing the best CMC for your application. To view the datasheets or order samples, visit Würth Elektronik online or visit the MyWE customer portal.
Würth Elektronik online: we-online.com
Listen to our PODCAST🎙️: we-online.com/en/news-center/podcast
Follow us on LinkedIn: linkedin.com/company/wurth-elektronik (Americas)
Follow us on LinkedIn: linkedin.com/company/wuerth-elektronik-group (Europe)
Like us on Facebook: facebook.com/WurthElectronics (Americas)
Like us on Facebook: facebook.com/Wuerth.Elektronik.Group (Europe)
Follow us on X: https://x.com/WurthElectronic/ (Americas)
Follow us on X: https://x.com/we_online (Europe)
Follow us on Instagram: instagram.com/wurthelectronics (Americas)
Timestamps:
00:00 Introduction
00:44 Music Intro
01:35 The Misconception of Inductance Vs. Impedance
02:52 Why Core Material Matters
04:10 Core Geometry and Winding Style
05:50 Current Imbalance and Saturation
07:15 A Simple Workflow for Selecting a Power-Line Common Mode Choke
08:20 Closing Remarks and a Recap of this Podcast Episode
