Buck converter chokes

Buck converter chokes

Attenuate undesired frequencies with the buck converter choke

The buck converter choke as an inductive passive component in the power supply and in power electronics is used to attenuate unwanted frequencies or for saving energy and storage.

Advantages of the buck converter inductor:

- Use in the kHz range possible
- Equal strength or higher power in smaller construction
- Significantly lower weight

  • NTT AMCC 400

    REO TSS choke with amorphous core

    NTT AMCC 400

    As a passive inductive component in power supplies and in power electronics, the buck-converter choke is used for attenuating undesirable frequencies or for saving and storing energy.


    The term buck-converter choke indicates the complete ready-for-use unit containing the choke, air cooling, mounting and connections. The chokes are available with different cores, which enables individual selection depending on the requirement of the application. In addition to iron-based cores, chokes with cores of amorphous alloy are becoming more common, in the form of toroidal cores, cut strip-wound cores or special custom solutions.


    The use of amorphous materials offers an exceptional combination of high satur­ation flux density (1.56 T) and a high permeability. In addition to the high temperature class, further features of amorphous alloy include low hysteresis and eddy-current losses, suitability for the medium-frequency range (<20 kHz) and use for high powers up to 500 kVA.



    • Type of choke: Up/Buck converter choke with iron core

    • Voltage of the system: 500 – 1100 V

    • Max. permissible tolerances: ( -10 % / +10 % )

    • Linearity: min. 0.2 mH @ 230 Aeff

    • Harmonic currents constantly / Superimposed Harmonics: 60 Ass @ 19 kHz

    • Insulation class: H

    • Cooling: AF

    • Protaction rating: IP65/66

    • Rated voltage for insulation: 1200 Vdc

    • Test voltage: 3.5 kV (50 Hz, 60 s)



  • NTT UI114-50

    REO TSS choke with iron core

    NTT UI114-50

    As a passive inductive component in power supplies and in power electronics, the buck-converter choke is used for attenuating undesirable frequencies or for saving and storing energy.


    The term buck-converter choke indicates the complete ready-for-use unit containing the choke, air cooling, mounting and connections. The chokes are available with different cores, which enables individual selection depending on the requirement of the application. In addition to iron-based cores, chokes with cores of amorphous alloy are becoming more common, in the form of toroidal cores, cut strip-wound cores or special custom solutions.


    The use of amorphous materials offers an exceptional combination of high satur­ation flux density (1.56 T) and a high permeability. In addition to the high temperature class, further features of amorphous alloy include low hysteresis and eddy-current losses, suitability for the medium-frequency range (<20 kHz) and use for high powers up to 500 kVA.



    • Type of choke: Up/Buck converter choke with iron core

    • Voltage of the system: 500 – 1100 V

    • Max. permissible tolerances: ( -10 % / +10 % )

    • Linearity: min. 0.2 mH @ 230 Aeff

    • Harmonic currents constantly / Superimposed Harmonics: 60 Ass @ 19 kHz

    • Insulation class: H

    • Cooling: AF

    • Protaction rating: IP65/66

    • Rated voltage for insulation: 1200 Vdc

    • Test voltage: 3.5 kV (50 Hz, 60 s)



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