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    EMC Input Filter for VFD, 10A/30A/50A/120A/200A to 1000A

    High-performance EMC input line filter has excellent interference suppression capability to the input side of VFD at 3-phase 3-wire AC 250/440V 50/60Hz, available rated current 6A/ 10A/ 30A/ 50A/ 120A/ 200A to 1000A, low leakage current, threaded stud or quick connect, high quality and low price.
    SKU: ATO-EMC-730
    30-day Returns
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    Delivery date: 6-12 days

    ATO-MT730 series 3-phase 3-wire EMC filters are designed for suppressing the interference of VFD input end to the power grid and other digital equipment. With a three-stage filter design, they works at 250/440V AC 50/60Hz, current rating from 6 Amp, 10 Amp, 20 Amp, 25 Amp, 40 Amp to 1000 Amp with high impedance characteristics over a wide range of frequency and excellent common mode and differential mode suppression capability.

    Applications: The EMC input line filters are widely used in variable frequency drives, servomotors, frequency converters and other industrial electronic equipment which work on the principle of frequency conversion as well as the work site with strict environmental requirements.


    1. Technical Data

    Model ATO-MT730
    Rate Voltage 250/440V AC
    Operating Frequency 50/60Hz
    Phase 3 Phase
    Rated Current @40℃ 6A-1000A
    Climatic Category 25/085/21 (-25℃ to +85℃)
    Test Voltage 2250V DC 3S (P - P); 2700V DC 3S (P - E)

    2. Selection Table

    Model Rated Current @40℃ Leakage Current (250VAC/50Hz @20℃) VFD Power (kVA) Dimension Connection Weight (kg)
    Threaded Stud Quick Connect
    ATO-MT730-6 6A <7.5mA 1.5 Fig.1 M4 1.45
    ATO-MT730-10 10A <7.5mA 3.0 Fig.1 M4 1.45
    ATO-MT730-15 15A <7.5mA 5.5 Fig.1 M4 1.5
    ATO-MT730-20 20A <7.5mA 7.5 Fig.1 M4 1.5
    ATO-MT730-25 25A <7.5mA 11.0 Fig.2 M6 3.1
    ATO-MT730-30 30A <7.5mA 15.0 Fig.2 M6 3.1
    ATO-MT730-40 40A <13.0mA 18.5 Fig.3 M6 3.3
    ATO-MT730-50 50A <13.0mA 22.0 Fig.3 M6 3.6
    ATO-MT730-60 60A <13.0mA 30.0 Fig.3 M6 3.6
    ATO-MT730-80 80A <40.0mA 37.0 Fig.4 M8 6.6
    ATO-MT730-100 100A <40.0mA 45.0 Fig.4 M8 6.63
    ATO-MT730-120 120A <40.0mA 55.0 Fig.4 M8 6.65
    ATO-MT730-150 150A <50.0mA 75.0 Fig.4 M10 6.95
    ATO-MT730-200 200A <50.0mA 95.0 Fig.4 M10 11
    ATO-MT730-300 300A <45.0mA 110/132 Fig.5 O 14
    ATO-MT730-400 400A <45.0mA 160 Fig.5 O 14
    ATO-MT730-500 500A <60.0mA 200 Fig.6 O 18
    ATO-MT730-630 630A <60.0mA 315 Fig.6 O 18
    ATO-MT730-800 800A <90.0mA 375 Fig.6 O 21.7
    ATO-MT730-1000 1000A <90.0mA 450 Fig.6 O 21.7

    Dimensions (Unit: mm)

    6A-30A EMC Input Line Filter Dimension

    40A-200A EMC Input Line Filter Dimensions

     300A-1000A EMC Input Line Filter Dimensions

    Typical Circuit Diagram

    VFD input filter typical circuit diagram

    Insertion Loss in dB

    * Straight line refers to common mode; dotted line refers to differential mode.

    VFD Input Filter Insertion Loss in dB 6A-50A

    VFD Input Filter Insertion Loss in dB 60A-400A

    VFD Input Filter Insertion Loss in dB 500A-1000A


    Tips: What is an EMC filter for variable frequency drive (VFD)?

    The special filter for variable frequency drive is a filter specially designed to eliminate the frequency spectrum components that interfere with the power grid and other digital electronic equipment and enhance the electromagnetic compatibility (EMC) of the VFD when it is working. The EMC filter for VFD is composed of a low-pass filter circuit made up of an inductor and a capacitor, which allows the current of the useful signal to pass, and has a larger attenuation for the interference signal with a higher frequency.

    The filters for variable frequency drive can be divided into VFD input filters and VFD output filters based on their use positions.
    1. Characteristics of VFD input filters

    • A wide range of attenuation characteristics;
    • Small leakage current.

    2. Characteristics of VFD output filters

    • dv / dt suppression, over-voltage limitation;
    • Reduce the electromagnetic interference of the VFD;
    • Reduce the loss of VFD and motor coil.
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