Cable Solutions

Ferrites for Cable Assembly

Ferrite cores and snap-on ferrites are designed to suppress EMI directly on the affected cable. They work by absorbing unwanted RF noise without affecting the useful signal. This makes them an easy and effective retrofit solution for improving EMC performance without altering the PCB.

Cable Shielding & Grounding

Shielding and grounding components provide a low-impedance return path for high-frequency noise on cable assemblies. This reduces emissions from the cable and protect cables from external interference.

Cable Holders

Cable holders provide mechanical support and organized routing of wires and cables within a device. They prevent mechanical stress on solder joints and connectors by securing cables in place.

Short Introduction to Cable Solutions

Every conductor is an antenna. Therefore, it's important to anticipate radiated noise from the power cord or data cables and prevent coupling by applying the right cable ferrites. However, since cables act as antennas, their position on the PCB or layout within the housing has a great impact on their EMC behaviour. Cable holders and conductive shielding solutions ensure order and consistency in the placement of your cables.

Learn More About Cable Solutions

The picture showes different Mounting Accessories

With ferrites for cable assembly, the EMC behavior can be improved in a variety of applications. Würth Elektronik offers mounting accessories for assembling the ferrites onto the cable.

Schematic picture of a magnetic field

Functionality of ferrites for cable assembly: The higher the permeability, the greater the magnetic field bundled in the material.

The image shows the frequency range of different series for wires (WIRE) and their respective application areas.

For ferrites used in cable assembly, different core materials lead to different permeabilities and, consequently, to different frequency ranges for optimal use.

iThe graphic shows the dependence of the Impedanceon the ambiant Frequency.

For ferrites used in cable assembly, higher suppression of interference signals can be better achieved with multiple turns than by using additional ferrites. The effects for 1 to 3 turns are visible in the diagram.

In cable shielding, it is important to have seamless shielding. A so-called pigtail can cause common-mode interference, which is generated by an RF voltage between the cable shield and the conductive housing.

The image shows a cable shield

A high impedance causes a voltage drop. The ground then behaves like an antenna. For cable shielding, a 360° coverage is crucial to ensure very low impedance.