EMI power filter

Swelex offers filters that block noise and conducted interference that could otherwise damage your electronic equipment. 

An example of conducted interference is that when travelling in an older car with the radio on and the windscreen wipers switched on at the same time, there is a humming sound in the loudspeaker. To remove the hum, a noise filter is probably needed.

There are many different types of interference filters, power filters for both alternating current (AC) and direct current (DC), equipment filters for different equipment such as the washing machine and telephone.

The simplest form of filter is that they protect against transient or voltage spikes.

An interference filter is characterised by how much it attenuates the interference in a conductor. The useful signal and the interference signal are separated by the filter cut-off frequency. The components of the filter must be able to withstand the power of the useful signal, while effectively filtering the interference in the filter's operating range (frequency span).

Please feel free to contact us directly if you have any questions about our offer. 

Choose the right filter to protect your electronics

If you want to protect your electronics from interference and have appliances that work smoothly, EMI power filters, data line filters and telephone line filters are essential solutions. These filters are used to block unwanted signals and noise that could otherwise interfere with or damage your equipment. Furthermore, Swelex also offers filters against EMP, NEMP, HEMP, LEMP and ROE.

What is an EMI power filter?

One example is the EMI power filter, known as an equipment filter, which is a small component that plugs in between the power outlet and your equipment. The filter acts as a safety net that stops interfering signals (EMI) from entering or leaving your electronics. It improves power quality and reduces the risk of faults, data loss or interference in, for example, computers, monitors, household appliances and other sensitive equipment.

What type of filter should I choose?

• EMI power filter:
  Protects general electronics, such as computers, monitors and household appliances. Choose a filter suitable for the amperage and voltage your equipment requires.
• Data line filter:
  Used to protect data lines and communication cables. High performance filters for digital and analogue circuits. For applications such as shielded rooms, data security, communication devices, signalling lines, TEMPEST, RÖS, EMC, EMP protected systems, including ISDN, RS232, RS422 and RS423 protocols.
• Telephone line filter 

Why should I use EMI filters?

• Protects your electronics from interference and failure
• Improves signal and power quality
• Reduces the risk of data loss and disruption