Nanocrystalline Common Mode Chokes

High Attenuation in Compact Designs

Common mode chokes (CMCs) based on nanocrystalline VITROPERM® offer highest attenuation in compact designs for a wide range of EMI requirements. The broad portfolio of standard types offers solutions for 1-phase and 3-phase applications as well as 4-fold CMCs.

Benefits:

  • Small size and high attenuation due to high permeability and saturation magnetization
  • Broad standard portfolio
  • Flat temperature characteristics
  • Solutions for high currents or high voltages available

Special Characteristics of Industrial Grade CMCs

  • UL1446-compliant designs based on VAC’s class B insulation system (File No. E329745)
  • Operating temperatures up to 130 °C
 

Designed for a wide range of applications:

  • Switched-mode power supplies (SMPS)
  • Solar inverters
  • Frequency converters
  • Welding equipment
  • Wind generators
  • Uninterruptible power supplies (UPS)

Special Characteristics of Automotive Grade CMCs

  • Ambient temperature: -40 °C < Ta < +115 °C
  • Max. short-term operating temperatures of Top = 160 °C
  • Rated insulation voltage: Ui= 525 Vrms (functional insulation, pollution degree 1)
  • Automotive qualified according to AEC-Q200
  • Design taking into account ‚Technical cleanliness‘ acc. to VDA 19 Part 2
  • Developed for DC/DC converters in hybrid and electric vehicles

General Characteristics

Application advantages

Technical background

Small size high µ, high BS
Suitable for high current
and/or high voltage
high µ, high BS, optimized core design
Single stage filter conpects possible extreme broadband attenuation behavior,
high permeability, low capacitance designs,
slow µ decline towards higher frequencies,
low Q factor in the 150 kHz range
High efficiency, low dissipation loss low number of windings necessary for high L, filter stage reduction
Suitable for high and low ambient temperatures and high operating temperatures high Curie temperature, material properties
(µ, BS, λS) virtually independent of temperature
Simplified filter design material properties (µ, BS, λS) virtually independent of temperature, constant impedance over a wide common mode current range due to linear magnetization curve

Superior EMC Filter and Common Mode Choke Design

Nanocrystalline cores are widely used in common mode choke (CMC) applications due to their unique combination of magnetic properties. By utilizing low-cost raw materials (Fe-based) and modern, large-scale production, VITROPERM is a very competitive solution for a wide range of applications.

Our CMCs feature high attenuation which is maintained across a wide frequency range offering extremely broadband attenuation. In many cases, this characteristic can allow a reduction of the number of filter stages in multistage EMC filter configurations to reduce complexity, cost and filter volume. Copper losses are also reduced, thus increasing the efficiency and lowering component temperature.

We have extensive practical and theoretical expertise in the design of CMCs and filter configuration using nanocrystalline cores and components. At higher frequencies, the winding configuration has a major effect on the parameters of winding capacitance and leakage inductance and is therefore carefully considered in our choke designs.

Design Advantages with VITROPERM

The superior material properties of nanocrystalline VITROPERM enable common mode chokes with high inductance/impedance, even with a small number of turns, resulting in reduced copper losses, low winding capacitance and excellent HF performance. Due to the high initial permeability, low winding capacitance and a low Q-factor, VITROPERM CMCs offer a broadband insertion loss curve ranging from 10 kHz up to several MHz and improved attenuation behavior at both low and high frequencies. Better attenuation properties and an extended operating temperature range allow a reduction of the component volume by a factor of up to 3 or more under similar conditions. The excellent attenuation of VITROPERM CMCs simplifies the filter design in a wide frequency range.

Special Characteristics of Industrial Grade CMCs

  • UL1446-compliant designs based on VAC’s class B insulation system (File No. E329745)
  • Operating temperatures up to 130 °C
 

Designed for a wide range of applications:

  • Switched-mode power supplies (SMPS)
  • Solar inverters
  • Frequency converters
  • Welding equipment
  • Wind generators
  • Uninterruptible power supplies (UPS)

Special Characteristics of Automotive Grade CMCs

  • Ambient temperature: -40 °C < Ta < +115 °C
  • Max. short-term operating temperatures of Top = 160 °C
  • Rated insulation voltage: Ui= 525 Vrms (functional insulation, pollution degree 1)
  • Automotive qualified according to AEC-Q200
  • Design taking into account ‚Technical cleanliness‘ acc. to VDA 19 Part 2
  • Developed for DC/DC converters in hybrid and electric vehicles

General Characteristics

Application advantages

Technical background

Small size high µ, high BS
Suitable for high current
and/or high voltage
high µ, high BS, optimized core design
Single stage filter conpects possible extreme broadband attenuation behavior,
high permeability, low capacitance designs,
slow µ decline towards higher frequencies,
low Q factor in the 150 kHz range
High efficiency, low dissipation loss low number of windings necessary for high L, filter stage reduction
Suitable for high and low ambient temperatures and high operating temperatures high Curie temperature, material properties
(µ, BS, λS) virtually independent of temperature
Simplified filter design material properties (µ, BS, λS) virtually independent of temperature, constant impedance over a wide common mode current range due to linear magnetization curve

Superior EMC Filter and Common Mode Choke Design

Nanocrystalline cores are widely used in common mode choke (CMC) applications due to their unique combination of magnetic properties. By utilizing low-cost raw materials (Fe-based) and modern, large-scale production, VITROPERM is a very competitive solution for a wide range of applications.

Our CMCs feature high attenuation which is maintained across a wide frequency range offering extremely broadband attenuation. In many cases, this characteristic can allow a reduction of the number of filter stages in multistage EMC filter configurations to reduce complexity, cost and filter volume. Copper losses are also reduced, thus increasing the efficiency and lowering component temperature.

We have extensive practical and theoretical expertise in the design of CMCs and filter configuration using nanocrystalline cores and components. At higher frequencies, the winding configuration has a major effect on the parameters of winding capacitance and leakage inductance and is therefore carefully considered in our choke designs.

Design Advantages with VITROPERM

The superior material properties of nanocrystalline VITROPERM enable common mode chokes with high inductance/impedance, even with a small number of turns, resulting in reduced copper losses, low winding capacitance and excellent HF performance. Due to the high initial permeability, low winding capacitance and a low Q-factor, VITROPERM CMCs offer a broadband insertion loss curve ranging from 10 kHz up to several MHz and improved attenuation behavior at both low and high frequencies. Better attenuation properties and an extended operating temperature range allow a reduction of the component volume by a factor of up to 3 or more under similar conditions. The excellent attenuation of VITROPERM CMCs simplifies the filter design in a wide frequency range.

List of Standard Common Mode Chokes

Nominal Current:  4.5 - 110  A
Windings:  2 - 4
Product Download IN
[A]
Number of WindingsUN
OVCat III
[V]
UN
OVCat II
[V]
Grade Design LN
10 kHz
[mH]
LN
100 kHz
[mH]
RCU
[mΩ]
|Z|
100 kHz
[Ω]
fR
[MHz]
Icm
10 kHz
[mA]
Length
[mm]
Height
[mm]
Width
[mm]
6131-X2044.52300600IndustryUpright10.82.527.52320112222512
6161-X50452300600IndustryUpright28.36.635.665000.410272917
6166-X20662300600IndustryUpright29.16.737.685000.2514353721
6166-X2088.52300600IndustryUpright16.43.719.142000.5173536.521
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6123-X2858526001000IndustryLow profile1.60.50.65101.6200734073
6123-X306736001000IndustryLow profile31.87.424.686500.232740.532.540.5
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6123-X3212036001000IndustryLow profile4.81.12.812002.355523452
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S6123-X3262536001000IndustryLow profile4.91.12.1115026051.53251.5
6122-X326263600100N/AN/A10.62.44.125000N/A646535
6122-X329293300600IndustryUpright3.60.81.48502.380645832
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6123-X1404036001000IndustryLow profile2.50.61.26004.7100523350
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6123-X3636336001000IndustryLow profile1.60.50.725001190704270
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6127-X009212N/AN/AAutomotiveUpright3.30.82.25780N/A45353523
6127-X01582N/AN/AAutomotiveUpright13.83.213.63310N/A18313322
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6127-X020142N/AN/AAutomotiveUpright4.414.11030N/A31313322

Downloads

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Common mode chokes (CMCs) based on nanocrystalline VITROPERM offer highest attenuation in compact designs for a wide range of EMI requirements.

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Nanocrystalline Material VITROPERM

VITROPERM is an iron-based nanocrystalline material with an outstanding combination of soft-magnetic properties which make it the state-of-the-art material for a wide range of applications, e.g. common mode chokes (CMCs), current transformers (CTs), EMI filters and shielding material in wireless power transfer.

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