EMI Suppression Filters (EMC and Noise Suppression)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.

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.

Selection chart for common mode choke coils

Selection chart for signal lines

Selection chart for power lines