High‑Current Planar Common Mode Choke for Demanding Power Systems

Solving EMI Challenges at High Current

As power platforms grow in current, power density, and layout complexity, electromagnetic interference control becomes a central design challenge rather than a late‑stage checklist item. Engineers must now meet higher current levels and stricter reliability targets in compact systems for industrial and aerospace environments, where failure is not an option.

To address these needs, Payton Planar Magnetics has developed a high‑current planar Common Mode Choke designed specifically for robust power platforms that demand stable EMI performance at elevated currents.

Key Performance Capabilities

This Common Mode Choke supports up to 200 A of common‑mode current, using dual 202 µH windings to deliver effective and consistent EMI attenuation around 20 kHz. The device fits into a compact 55 mm footprint with a mass of only 350 g, helping designers maintain high power levels without sacrificing space.

The choke is designed for natural convection cooling, with hotspot behavior tightly controlled to support long‑term operation in harsh environments. High dielectric strength ensures reliable isolation, even under demanding electrical stresses typical of industrial and aerospace power systems.

Planar Construction for Reliability and Repeatability

Its planar‑based construction provides excellent current handling, consistent magnetic behavior from unit to unit, and strong mechanical robustness. Welding‑compatible copper terminals and a rugged assembly enable secure integration into mission‑critical platforms and support repeatable, high‑volume manufacturing.

These characteristics make the choke well suited for industrial power supplies, aerospace power conditioning, high‑current converters, and advanced EMI filtering stages where size, current, and reliability must all be optimized simultaneously.

One Team, One Facility, Full Accountability

At Payton, design, prototyping, and production are all carried out under one roof, giving customers a single accountable partner throughout the entire product lifecycle. A unified engineering and manufacturing team streamlines communication, accelerates development, and helps ensure that each Common Mode Choke is aligned with precise electrical, mechanical, and thermal requirements.