ACST series current sensors in charging cables for electric vehicles

For more information:
ZETTLER Magnetics, Inc.
2410 Birch St
Vista, CA 92081 USA
Phone: (949)-360-5838

Application Spotlight August 2017

The trend towards using renewable energies continues unabated, especially in a broad global push for rechargeable electric vehicles.

In the development of an IC CPD (In-Cable Control and Protecting Device) for the charging cable of an electrically powered vehicle, a leading automobile manufacturer, replaced a previous design element with a current sensor from the ACST series manufactured by ZETTLER Magnetics. The previous design featured a sensor in which the electrical conductor had to be routed through the core, resulting in significant assembly effort in association with high costs.

With the ACST series current sensor from ZETTLER Magnetics, the conductor (primary winding) is already integrated into the sensor, thereby allowing it to directly detect the current being applied to the printed circuit board. Another design requirement, increasing the cross-section of the primary winding necessary for detecting currents of up to 32A, was also realized. Apart from the height, it was possible to preserve the dimensions of max. 20.5 x 17.5 mm. The height had to be increased from 16.4 mm to 20.0 mm due to the attachment of an additional plastic hood to assure reliable insulation of the primary winding.

This application example demonstrates, once again, the versatility of Zettler Magnetics components, and our ability to find pragmatic and highly effective engineering solutions for our customers.

For more information about products manufactured by the ZETTLER Group that are used in e-mobility applications, please visit

For similar solutions or to discuss the wide variety of application opportunities for the range of ZETTLER Magnetics Transformers, please contact us.

About ZETTLER Magnetics, Inc.

Zettler Magnetics, Inc., a Zettler Group company, provides application-engineering, sales, distribution and customer service for a wide variety of top quality transformers and magnetics components in North America. We cater to a broad spectrum of customers in diverse industries and across many applications.

Zettler Magnetics Transformers include epoxy sealed power transformers encapsulated switch-mode modules, open frame, low profile, switching transformers and chokes, while toroids include current sensing, zero phase current sensor, current transformers, PFC chokes and large power line filter inductors. Zettler Magnetics has the design and manufacturing capability to provide custom designs for the most specialized applications.