CONTACT :
Electronicke soucastky CZ, Inc.
Syllabova 2980/37A
703 00 Ostrava, Czech Republic
VAT: CZ25852361
Phone: +420 595 781 623
E-mail: Write us

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Interference suppression filters

We offer:

Filters for mains-applications 250V 50/60Hz

• F 100.005 2,5A 250V 50Hz
• F 100.006 3,2/5A 250V 50Hz
• F 100.008 25A 250V 50Hz
• F 100.010 3,2A 250V 50Hz
• F 100.011 6,3A 250V 50Hz
• F 100.012 16A 250V 50Hz
• F 100.013 (F241P) 2,5A 250V 50Hz
• F 100.014 2A 250V 50Hz
• F 100.016 8A 250V 50Hz
• F 100.018 6,3A 250V 50Hz
• F 100.019 3,2A 250V 50Hz
• F 100.023 DIN 1A 250V 50Hz
• F 100.024 16A 250V 50Hz
• F 100.025 3,2A 250V 50Hz
• F 100.026 6,3A 250V 50Hz
• F 100.028 do 25A 440V 50/60Hz
• F 100.033 3,2A 250V 50Hz
• F 100.034 250V 50/60Hz 4Aef
• F 100.035 250V 50/60Hz 8Aef
• F 100-036
• F 100.037.1
• F 100.037.2
• F 100.037.3
• F 100.038
• F 100.040
• F 100.041 6A 250V/50/60Hz
• F 241 2,5 A/4A/6,3A 250V 50Hz
• F 241S 2,5 A/4A/6,3A 250V 50Hz
• F 101.241 2,5A/4A/6,3A 250V 50 Hz
• F 101.241P 2,5A/4A/6,3A 250V 50 Hz
• F 255M X1Y2 250V 50/60Hz
• F 255M X2Y2 250V 50/60Hz
• F 255MT X1Y2 250V 50/60Hz
• F 255MT X2Y2 250V 50/60Hz
• F 255MRad 250V 50/60Hz
• F 256MT X2Y2 250V 50/60Hz
• F 800 0,5A 250V 50Hz
• F 821 1A 250V 50Hz
• F 811.1011 0,6A 250V 50 Hz
• F 811.1135 4A 250V 50Hz
• F 800.2143 2,5A/4A 250V 50Hz
• F 241S 2,5A/4A/6,3A 250V 50Hz

Filters for DC-supply applications

• F 100.029 10A do 100VDC
• F 100.030 0,3A do 100VDC
• F 852 03 100VDC 6,3A

Filter for three - phase mains - applications

• 3F 100.027

You can find all our products here

The electronic devices must conform to the noise regulations and limits.
The noise, generated by electronic devices are:

- radiated noise, which are direct transmitted into the air from the electronic devices
- radiated noise picked up and generated by the power line and by the signal lines. The signal lines and power line act as an antenna
- noise entering from the ground line

The principles are shown below in fig. 1

--- Fig. 1 ---

As shown in fig. above, the noise can be divided in two types, normal mode noise - symmetrical noise between the lines and common mode noise - asymmetrical noise between a line and ground.

The filter operates according to a principle whereby the inductance L, connected in series with the line has negligible affect on the noise current at low frequencies, but at higher frequencies makes high impedance. The capacitor, connected in parallel with the line, is used as a side path to return high frequency current back to the power line.

The result is, that the normal mode noise passes through the capacitor and shunted back to the other line. The common mode noise passes through the midpoint of the capacitors Y to the ground.

--- Fig. 2 ---

Such network is the most frequently used type in real applications. It serves for both, asymmetrical as well as symmetrical interference suppressions.

Symmetrical interferences are being suppressed by the capacitors X2. Additional impedance of the inductance support the effect. Asymmetrical interferences are being reduced by the inductances and capacitors Y2. The Y2 capacitors are acting as HF shunt also. It is also necessary to know that the value of the capacity Y2 is determined by the maximum permissible leakage current of the device. The typical values of permissible leakage currents depend on the safety class of the device and are from 0,25 to 3,5mA and there are determined by IEC 60950.

The inductivities used in this filters are current compensated inductances of course.

KW040401