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    20A 3-phase EMI Line Filter for motor drivers

    20A 3-phase EMI line filter in dual-stage configuration, has an excellent performance of differential mode and common mode attenuation, suitable for most of motor drivers.
    SKU: ATO460-20
    Free shipping
    Delivery date: 6-12 days

    20A EMI power line filter, 3-phase dual-stage, maximun voltage rating to 440V AC, features compact, easy to install and provides effective shielding for noise generated externally and internally.


    Basics Model ATO460-20
    Type 3-phase dual-stage
    Operating temperature -25℃~85℃
    Weight 1.1kg
    Installation Screw M4
    Technical parameters Rated voltage(Max) 440V AC
    Operating frequency 50/60Hz
    Hipot rating(one minute) Line to line 2250V DC
    Line to ground 2700V DC
    Rated current(@ 40℃) 20A
    Insulation Resistance(Line to ground) 200MΩ @ 500V DC for one minute
    Capacitance(CY) 47nF
    Insertion loss in dB (measured in 50Ω system)
    Frequency(MHz) 0.1 0.15 0.5 1 5 10 30
    Common mode(line to ground) 7 20 55 68 66 58 51
    Differential mode (line to line) 9 14 70 72 66 65 65



    A: 110mm B: 125±1.0mm C: 140mm D: 70±0.5mm E: 93mm F: 56mm G: 5.3*7mm H: M4

    Electrical schematic

    3 phase 2 stage filter electrical schematic

    Tips: Band pass filter vs. band stop filter

    1. Definition & performance
      Band pass filter: allows certain frequency band signal to pass through, and restrains lower or higher than the certain frequency band signal, interference and noise.
      Band stop filter: restrains certain frequency band signal and allows signals outside the certain frequency band to pass through.
    2. Working principle
      A perfect band pass filter should has a complete flat pass band without amplification or attenuation in the pass band, and all frequency outside pass band would be attenuated completely. Besides, the conversion outside pass band will be completed within very small frequency range. Actually, no perfect band pass filter existed. Filter can’t attenuate all frequency outside the expected frequency range completely, especially outside the requested pass band there is an attenuated but not insulated range. This is usually called filter roll down phenomenon, and expressed with attenuation fluctuation dB value of every 10 times frequency. Usually, filter design would try to guarantee roll down range as narrow as possible, in the case filter performance will get closer to design. But, with the roll down range getting smaller, pass band will no longer flat, starting to appear “ripple”. This phenomenon is obvious at pass band edge, which is called Gibbs phenomenon. Band stop filter can pass most frequency component, attenuating the certain range frequency component to extremely low level. It’s opposite with band pass filter definition. Among them, notch filter is a special band stop filter, whose stop band range is very small, and has very high Q factor.

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