One of the prime threats to electrical devices is electromagnetic interference. The purpose of power filters is to mitigate this danger as much as possible. Right here you can take your pick from multiple, state-of-the-art devices of this kind.

While their applications may slightly differ, endurance, efficiency and reliability is a common denominator of them all.

Don't let particularly susceptible equipment get damaged by electrical noise. Our filters will keep it functional and safe from interference.

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Power Filters as an Extra Safety Measure

One might ask why would another power filter be necessary since most electronic equipment does have a built-in power filter after all.

While that may be true, in many cases an external power filter is an absolutely necessary addition to the internal one so that the safety regulation standards are properly met. The basic filters are usually enough in ideal conditions only. In reality, however, these ideal conditions are seldom replicated. From natural to man-made EMI causes, the dangers to your device are plentiful. Especially in industrial environments.

Therefore, another filter is more often a necessity than a mere luxury.

Power Filter for AC Networks

If your equipment runs on alternating current, then it's our JETAF series filters that are meant precisely for you. These filters can be used in both analog and digital equipment and will keep it shielded from sudden surges and other noises of various origin.

The amorphous nanocrystal line core technology allows for an unprecedented temperature stability. This makes our devices suitable for uses in equipment operating in extreme climatic conditions.

To achieve maximum results, combining these with our AC/DC power supplies is recommended.

Low-pass filter for DC networks

These JETDF-series filters will protect all of your equipment in DC networks and are compatible with practically all of the off-shelf devices, though we –again – recommend combining them with DC/DC converters of our making to achieve maximum effectiveness.

By not having a power filter as an extra measure in protecting your equipment, you risk anything from decreased performance to outright damage. Don't put your devices at risk!

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What is a low-pass filter?

In simple terms, it is a device consisting of inductors and capacitors that helps to reduce unwanted electrical signal frequencies. The majority of EMI typically comes with a higher amplitude. The filter allows only the lower frequencies to pass while blocking out or rerouting the higher ones. Hence the name low-pass filter.

Line noise attenuation capability of our products

The effectiveness of any given filter is measured by what is called insertion loss. This loss is basically the amount of noise travelling through the transmission line that is effectively attenuated by adding the filter to the transmission line.

It is calculated as the ratio of the signal at the filter input to the signal at the filter output. Attenuation loss is expressed in decibels and it varies with respect to the frequency range.

To illustrate in more detail, here is the attenuation loss of our filters:

Single-phase AC filters (JETAf 1, 5, 10, 20):

Frequency range

Insertion loss

0.15-0.3 MHz

≥20 dB

0.3-1 MHz

≥35 dB

1-10 MHz

≥55 dB

10-30 MHz

≥50 dB

3-phase AC filter (JETAF 15-400)

Frequency range

Insertion loss

0.15-0.3 MHz

≥55 dB

0.3-1 MHz

≥60 dB

1-10 MHz

≥30 dB

10-30 MHz

≥20 dB

DC filters (JETDF series)

Frequency range

Insertion loss

0.15-0.3 MHz

≥15 dB

0.3-1 MHz

≥35 dB

1-10 MHz

≥55 dB

10-30 MHz

≥50 dB

Make sure to abide by international electromagnetic compatibility rules. Stay on the safe side by purchasing a reliable filter that protects not only one device, but all the other further down the line as well!

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However, There's More than Power Line Noise Threatening Your Devices

The causes of electric interference are plentiful and not all can be attenuated by simply adding an additional filter. Although our products will protect you from the vast majority of interference travelling along the power line, there are other dangers such as radiated EMI that a line filter can do little against.

So don't underestimate the question of external shielding in addition to a power line EMI filter if you wish to achieve maximum protection for your equipment!

Don't hesitate to contact us if you're uncertain about how to best protect your equipment. We'll help you choose the appropriate filter and provide any other relevant information you ask for!

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