Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

There are many kinds of problematic noise that are emitted from the devices installed in vehicles.
The examples of the actions taken to suppress noise described here deal with the noise that is radiated from the USB signal cables.

We are making public the common mode choke coil selection guides for each application.

Non-automotive grade:
Common mode choke coil selection guide for signal lines
Common mode choke coil selection guide for power lines

Automotive grade:
Common mode choke coil selection guide for signal lines
Common mode choke coil selection guide for power lines

Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles

※The EUT here is not a product intended to be installed in a vehicle, but as the noise conditions are similar, a device for general applications is used instead.

※The tests have been carried out in both the USB 2.0 and USB 3.0 modes.

 EUT:Equipment Under Test


Here, measures to suppress noise in signal lines and in power lines, together with the effects of these measures and the test data, will be introduced.


Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles



Details of measures taken under the CISPR25 Class 5 standard in the USB 2.0 mode
Details of measures taken under the CISPR25 Class 5 standard in the USB 3.0 mode
Summary of measures taken for CISPR25 Class 5 standard signal lines


Examples of actions taken to comply with the CISPR25 standard governing radio emissions (noise emitted) from devices mounted in vehicles



Details of measures taken under the CISPR25 Class 5 standard in the USB 2.0 mode
Details of measures taken under the CISPR25 Class 5 standard in the USB 3.0 mode
Summary of measures taken for CISPR25 Class 5 standard power lines