Common-mode Nanocrystalline chokes

ABOUT COMMON-MODE CHOKES

Common mode choke coils block undesirable high-frequency noise typically from unshielded electronics, inverters, and motors. This noise can simultaneously come from both input sides (line and neutral) and also radio signals; whose radiated signals can induce additional undesirable noise currents.

Schematic of common-mode chokes used to suppress common mode noise

These common-mode chokes consist of a core with at least two windings, where the current flows in the same direction through each of the windings, producing in-phase magnetic fields. This results in a high impedance to the common mode signal, while allowing low-frequency current to flow unimpeded.

TECHNICAL ADVANTAGE

The selection of the proper core material for common mode choke coils is the main contributor to creating an effective common mode choke. Cores made of amorphous ribbon similar to Metglas® that is field annealed into Nanocrystalline ribbon have three times higher impedance at 3MHz than that of Mn-Zn Ferrite and can be much smaller and weigh significantly less. For example, an Mn-Zn ferrite rated at 20A and an impedance of 3mH at 100kHz using a Nanocrystalline core will weigh 47% less and be 45% smaller.

Common mode chokes made with Nanocrystalline cores tend to have the highest impedance in the frequency bandwidths which tend to be the most problematic to pass Electromagnetic Interference (EMI) and Electromagnetic Compatibility (EMC) testing. Nanocrystalline material is also extremely stable over temperature. APPLICATIONS

Common mode chokes constructed with Nanocrystalline cores provide significant size and weight reductions. This along with high noise attenuation in the frequency bandwidth needed, make these components especially well-suited for applications such as:

  • DC Charging Stations
  • Traction Inverters
  • Extremely Fast Vehicle Charging (XFC)
  • Energy Storage Inverters
  • Medium-and Heavy-Duty Electric Vehicle Charging
  • Wireless High-Frequency Charging
  • High-Performance Hybrid Electric Vehicles (HEVs)

COMMON MODE CHOKE COILS AND CORES MADE WITH NANOCRYSTALLINE MATERIAL

Common Mode Chokes (CMC) made with Nanocrystalline material have superior characteristics when compared to the most commonly used material Mn-Zn ferrite.

Higher Permeability The potential of designing smaller common mode choke coils (CMC) with the same number or fewer turns is of interest to many designers. Nanocrystalline materials offer this possibility by providing a complex permeability (µr at 100kHz and 20°C), which is more than twice that of Mn-Zn ferrite. The impedance relative permeability (µrz) is more than four times as high as Mn-Zn ferrite. In one case, this allows the designer using Nanocrystalline material to use a core of identical size to Mn-Zn ferrite, which will produce a four times higher impedance with the same number of turns. In another case, the designer can use this material to reduce the windings by ½ and to obtain the same low-frequency impedance, significantly reducing stray capacitance and as a result, the high-frequency impedance also becomes large. The below charts show the higher impedance benefit of field-annealed nanocrystalline cores versus Mn-Zn ferrite.
Higher impedance characteristics using Common mode Nanocrystalline chokes

Comparison of magnetic and physical properties between FINEMET® and Mn-Zn ferrite

 

FT-3KL

FT-3KM

 Mn-Zn ferrite
Initial permeability at 100 kHz µr’ 20° C 17,000 17,000 5,300
100° C 15,000 18,000 7,000
Impedance permeability at 100 kHz  µrz 20° C 18,500 26,900 5,300
100° C 16,000 27,100 7,000
Saturation magnetic flux density Bs* (T) 20° C 1.23 1.23 0.44
100° C 1.20 1.20 0.27
Residual magnetic flux density Br* (T) 20° C 0.06 0.62 0.10
100° C 0.04 0.59 0.06
Coercive Force Hc *(A/m) 20° C 0.6 2.5 8.0
100° C 0.6 2.7 4.9
Curie temperature Tc (°C) 570 570 150
Saturation magnetostriction λs (x106) ~0.0 ~0.0 -1.1
Electrical resistivity ρ(µΩ.m) 1.2 1.2 1.0x106
Density d(kg/m3) 7.4x103 1.27.3x103 4.85x103
The temperature has little effect on permeability

Another concern to many designers is the temperature dependence of many materials used for common-mode chokes (CMC) designs. Often, larger cores with more turns are used to compensate for temperature drift. Nanocrystalline material’s frequency characteristics of impedance are not significantly affected by temperature change. As a result, it offers high noise suppression performance over a wide temperature range.

Temperature dependence of impedance curves nanocrystalline comomn mode chokes

FINEMET® FT-3K50T AND FT-8K50D

Group of oval shaped FT-3K50T and FT-8K50D Common-mode nanocrystalline cores

These are the latest and most advanced materials produced by applying a controlled magnetic field during annealing to industry-leading thin nanocrystalline ribbon, which is much thinner than amorphous ribbon such as Metglas®. This provides a material that satisfies both high saturation magnetic flux density and high permeability.

Other standard features:
  • Low core loss
  • Low magnetostriction
  • Excellent temperature characteristics
  • Small aging effects
  • Excellent high-frequency characteristics
  • Flexibility to control magnetic properties " B-H curve shape " during the annealing process
Low profile oval shaped FT-3K50T and FT-8K50D common-mode nanocrystalline chokes

MATERIAL PROPERTIES

Material Bsat(T)) Permeability at 10kHz Permeability at 100kHz Br/Bs Saturation magnetostriction, λs (X 10^-6) Coercive force, Hc (A/m)
FT-3KS 1.23 100,000 20,000 40 1 15
FT-3KM 1.23 70,000 15,000 50 1 2.5
FT-3K50T 1.23 50,000 31,000 10 1 1.2
FT-3KL 1.23 27,000 17,000 5 1 0.6
FT-8K50D 1.32 5,000 5,000 0.7 8 1.4

NANOCRYSTALLINE PERFORMANCE CURVES

Common mode Nanocrystalline chokes performance curves
Standard cores available:
 
New materials:
Nanocrystalline FT-3KM common mode bus bar core
 

FT-3K50T F SERIES -TOROIDAL CORE

Group of FT-3K50T nanocrystalline Toroidal Cores for common mode chokesMechanical details of FT-3K50T nanocrystalline Toroidal Cores for common mode chokes
Upgrade your common mode chokes with Nanocrystalline material, 3x higher impedance at 3MHz, 47% lighter & 45% smaller common mode choke coil designs.
Product Code P/N Finished Dimensions (mm) AL value (µH/n2)
A B C Ac (mm2) TYP Lm (mm) TYP Weight (g) TYP 10 kHz MIN 100 kHz ±30%
F1AH1157 FT-3K50T F1613YS 17.8 8.0 10.7 45.2 7.9 4 7.7~14.3 6.4±30%
F1AH1181 FT-3K50T F2117DS 23.3 15.3 13.9 18.9 59.6 11 14.7~27.3 12.0 ± 30%
F1AH1182 FT-3KM50T F2515DS 28.5 17.5 12.3 44.3 93.325 30.7~65.9 27.2 ± 30%
F1AH1183 FT-3K50T F3020CS 33.1 13. 17.4 37.6 79.3 28 21.6.4~40.2 179.9 ± 30%
F1AH1107 FT-3K50T F3320ES 36.3 18.2 16.8 71.2 83.3 49 37.6~80.6 33.3 ± 30%
F1AH1108 FT-3K50T F3724ES 40.5 18.3 20.6 71.2 60 49 33.9~62.9 28.1 ± 30%
F1AH1184 FT-3K50T F4032ES 42.3 17.8 29.1 43.8 113.0 40 16.1~29.8 14.2 ± 30%
F1AH1185 FT-3K50T F4424GS 47.1 23.4 21.0 138.8 106.8 123 57.1~122.4 50.6 ± 30%
F1AH1109 FT-3K50T F4535GS 49.5 25.7 30.5 73.0 141.0 80 22.6~49.9 20.0 ± 30%
F1AH1186 FT-3K50T F4627HS 50.7 29.2 22.9 173.4 114.7 164 66.5~142.5 58.9 ± 30%
F1AH1187 FT-3K50T F5040GD 52.3 22.8 37.1 73.0 141.0 80 22.6~49.9 20.0±30%
F1AH1110 FT-3K50T F6045GS 64.7 26.0 40.3 104.4 166.0 162 27.6~59.2 24.4 ± 30%
F1AH1111 FT-3K50T F7555GS 79.7 25.7 50.3 142.3 205.0 267 30.5~49.9 27.1±30%
F1AH1112 FT-3K50T F10080GS 104.7 25.7 75.3 138.8 285.1 336 20.9~44.7 18.5±30%
F1AH1113 FT-3K50T F140100PS 145.0 36.0 95.3 4275.5 380.1 1335 49.5~106 43.8±30%
 

FT-8K50D F SERIES - TOROIDAL CORES

Group of FT-8K50D nanocrystalline Toroidal Cores for common mode chokesMechanical details of FT-8K50D nanocrystalline Toroidal Cores for common mode chokes
Product Code P/N Finished Dimensions (mm) AL value (µH/n2)
A B C Ac (mm2) TYP Lm (mm) TYP Weight (g) TYP 10 kHz MIN 100 kHz ±30%
F1AH1121 FT-8K50D F4535G 49.5 25.7 30.5 75.0 125.7 89 3.7 ± 30% 3.7 ± 30%
F1AH1122 FT-8K50D F6045G 64.7 26.0 40.3 107.3 166 157 4.1 ±30% 4.0 ± 30%
F1AH1123 FT-8K50D F7555G 79.7 25.7 50.3 146.3 200.5 272 4.5 ± 30% 4.4 ± 30%
F1AH1124 FT-8K50D F10080G 104.7 25.7 75.3 139.5 286.2 336 3.1 ± 30% 3.0 ± 30%
F1AH1125 FT-8K50D F140100P 145.0 36.0 95.3 430.9 382.8 1350 7.1 ± 30% 7.0 ± 30%
F1AH1164 FT-8K50D F160130H 166.9 30.5 123.9 292.5 455.5 1029 4.0 ± 30% 4.0 ± 30%
F1AH1126 FT-8K50D F200160P 205.0 36.0 155.0 427.5 568.6 1930 4.7 ± 30% 4.7 ± 30%

Download EMC brochure for information on common mode components:

LARGE NANOCRYSTALLINE COMMON MODE INDUCTOR CORES

If you require much larger cores for common mode chokes with rated currents over 100Amps, these cores offer you the size to solve RF noise problems.

They can be used for signal lines, DC power lines, and AC power lines. Because of the low magnetostriction, these cores also provide low audible noise. Cores with base plates only require cabling with the appropriate BIL insulation for the voltage being used. L-type cores are used when a DC offset is present, see BH curves.
 

FT-3KM F SERIES - NANOCRYSTALLINE "M TYPE" TOROIDAL CORES

Single phase nanocrystalline common mode core groupMechanical details of FT-3KM nanocrystalline Toroidal Cores for common mode chokes
Product Code P/N Finished Dimensions (mm) AL value (µH/n2)
A ±0.7 B ±0.7 C ±0.7 Ac (mm2) TYP Lm (mm) TYP Weight (g) TYP 10 kHz MIN 100 kHz ±30%
F1AH0047 FT-3KM F2515D 28.0 ± 0.5 16.8 + 0.7 12.8 + 0.5 46.9 62.8 25 42.0~100.0 16.9 + 30%
F1AH1139 FT-3KM F3020C 31.0 ± 0.5 13.0 ± 0.7 17.4± 0.5 >38.2 78.9 28 29.8~55.4 11.0 + 30%
F1AH0048 FT-3KM F3320E 35.8 ± 0.5 17.5 ± 0.7 17.3 ± 0.5 73.1 83.3 49 49.7~120.0 19.9 ± 30%
F1AH0049 FT-3KM F3724E 49.0 ± 0.5 17.6 ± 0.7 21.1 ± 0.5 73.1 95.8 59 43.0~100.0 17.3 ± 30%
F1AH1140 FT-3KM F4032E 42.0 17.0 29.0 40.8 111.6 40 22.5~41.8 8.3 ± 30%
F1AH0050 FT-3KM F4424G 46.5 ± 0.5 22.8 ± 0.6 21.1 ± 0.5 142.5 106.8 123 75.4~180 30.2 ± 30%
F1AH0896 FT-3KM F4535G 49.0 ± 0.5 25.0 ± 0.7 31.0 ± 0.5 75.0 125.7 89 34.0~80.0 13.5 ± 30%
F1AH0897 FT-3KM F4627H 50.0 ± 0.7 28.2 ± 1.0 23.4 ± 0.5 178.1 114.7 168 89.2~210.0 35.1 ± 30%
F1AH0898 FT-3KM F6045G 64.0 ± 0.7 25.0 ± 1.0 41.0 ± 0.7 112.5 164.9 162 39.0~90.0 15.4 ± 30%
F1AH0899 FT-3KM F7555G 79.0 ± 0.7 25.0 ± 0.7 51.0 ± 0.7 150 204.2 267 42.0~100.0 16.6 ± 30%
F1AH0900 FT-3KM F10080G 104.0 ± 0.7 25.0 ± 0.7 76.0 ± 0.7 138.8 285.1 336 30.0~65.0 12.0 ± 30%
F1AH0901 FT-3KM F140100 144.0 ± 1.0 35.0 ± 1.0 96.0 ± 0.7 427.5 380.1 1335 24.8 ± 30% 24.8 ± 30%
F1AH0024 FT-3KM F200160 204.0 ± 1.0 35.0 ± 1.0 156.0 ± 1.0 427.5 568.6 1875 42.0~100.0 15.1+50%,-30%
 
M-type cores with base and base plate combined
With base plate Mechanical details of foot mounted single phase FT-3KM nanocrystalline common-mode choke core
Base and core combined Mechanical details of case mounted single phase FT-3KM nanocrystalline common-mode choke core
Product Code P/N Finished dimensions in mm
A Max B Max C Max D ±0.5 E ±0.3 F ±0.5 G ±0.5 H ±0.5 K Min
F1AH0026 FT-3KM F6045GB 95.0 26.0 78.0 80.0 12.5 72.0 50.0 7.0 39.5
F1AH0027 FT-3KM F7555GB 121.0 30.0 100.0 100.0 - - - - 50.0
F1AH0053 FT-3KM F10080GB 161.0 32.0 122.0 140.0 - - - - 75.0
F1AH0029 FT-3KM F11080GB 181.0 26.0 131.0 150.0 12.5 124.0 100.0 20.0 74.0
F1AH0031 FT-3KM F140100PB 181.0 42.0 162.0 160.0 - - - - 95.0
F1AH0032 FT-3KM F200160PB 241.0 42.0 217.0 220.0 - - - - 155.0
Upgrade your common mode chokes with Nanocrystalline material, 3x higher impedance at 3MHz, 47% lighter & 45% smaller common mode choke coil designs.
Product Code P/N Ae (mm2) Typical Lm (mm) Typical Weight (g) Typical Applied Screw AL value(µH/N2) Shape
I J 10kHz 100kHz
F1AH0026 FT-3KM F6045GB 112.5 164.9 193.0 M4 M5 39.0 ~ 90 15.4 ±30% Combined
F1AH0027 FT-3KM F7555GB 150.0 204.2 377.0 - - 42.0 ~ 100 16.6 ±30% Base Plate
F1AH0053 FT-3KM F10080GB 138.8 285.1 516.0 - M6 30.0 ~ 65 12.0 ±30% Base Plate
F1AH0029 FT-3KM F11080GB 213.8 300.8 613.0 M5 M6 40.2 ~ 95 16.1 ±30% Combined
F1AH0031 FT-3KM F140100PB 427.5 380.1 1595 - M6 63.0 ~ 150 24.8 ±30% Base Plate
F1AH0032 FT-3KM F200160PB 427.5 568.6 2235 - M6 42.0 ~ 100 15.1 +50%,-30% Base Plate
 

FT-3KL F SERIES- NANOCRYSTALLINE "L TYPE" TOROIDAL CORES

Group of nanocrystalline FT-3KL toroidal cores for common mode chokesMechanical details of nanocrystalline FT-3KL toroidal cores for common mode chokes
Product Code P/N Finished Dimensions (mm) AL value (µH/n2)
A B C Ac (mm2) TYP Lm (mm) TYP Weight (g) TYP 10 kHz MIN 100 kHz ±30%
F1AS3249 FT-3KL F2515D 28.5 ±0.5 17.5 ±0.7 12.3 ±0.5 46.9 62.8 25 14.5 ~ 27.0 15.3 ±30%
F1AS3250 FT-3KL F3020C 33.1 ±0.5 13.0 ±0.7 17.4 ±0.5 37.6 79.3 28 9.7 ~ 18.5 10.5 ±30%
F1AH0680 FT-3KL F3320E 35.8 ±0.5 17.5 ±0.7 17.3 ±0.5 73.1 83.3 49 17.8 ~ 33.0 18.8 ±30%
F1AH0681 FT-3KL F3724E 40.0 ±0.5 17.6 ±0.7 21.1 ±0.5 73.1 95.8 59 15.4 ~ 28.7 16.3 ±30%
F1AS3251 FT-3KL F4032E 42.3 ±0.5 17.8 ±0.7 29.1 ±0.5 43.8 113.0 40 6.5 ~ 17.5   8.9 ±30%
F1AS3252 FT-3KL F4424G 47.1 ±0.5 23.4 ±0.7 21.0 ±0.5 142.5 106.8 123 23.0 ~ 54.2 28.5 ±30%
F1AH0682 FT-3KL F4535G 49.0 ±0.5 25.0 ±0.7 31.0 ±0.5 75 125.7 89 12.1 ~ 22.4 12.8 ±30%
F1AS2799 FT-3KL F4627H 50.7 ±0.7 29.2 ±0.7 22.9 ±0.5 178.1 114.7 168 34.1 ~ 54.4 33.2 ±30%
F1AS3253 FT-3KL F5040G 52.3 ±0.7 22.8 ±0.5 37.1 ±0.7 73.0 141.0 80 9.9 ~ 18.4 11.0 ±30%
F1AH0683 FT-3KL F6045G 64.0 ±0.7 25.0 ±1.0 41.0 ±0.7 107.3 166 162 13.1 ~ 24.3 13.8 ±30%
F1AH0684 FT-3KL F7555G 79.0 ±0.7 25.0 ±0.7 51.0 ±0.7 146.3 205 267 14.4 ~ 26.8 15.2 ±30%
F1AH0685 FT-3KL F10080G 104.0 ±0.7 25.0 ±0.7 76.0 ±0.7 138.8 285.1 336 9.8 ~ 18.3 10.4 ±30%
F1AH0686 FT-3KL F140100 144.0 ±1.0 35.0 ±1.0 96.0 ±0.7 427.5 380.1 1335 22.8 ~ 42.3 24.0 ±30%
F1AS3254 FT-3KL F200160 205.0 ±1.0 35.0 ±1.0 155.0 ±0.7 427.5 568.6 1875 14.4 ~ 26.8 16.1 ±30%
 
L-type core with base and base plates combined
With base plate Mechanical details of foot mounted single phase FT-3KL nanocrystalline common-mode choke core
Base and core combined Mechanical details of case mounted single phase FT-3KL nanocrystalline common-mode choke core
Product Code P/N Dimensions in mm
A Max B Max C Max D ±0.5 E ±0.3 F ±0.5 G ±0.5 H ±0.5 K Min
F1AH0687 FT-3KL F6045GB 95.0 26.0 78.0 80.0 12.5 72.0 50.0 7.0 39.5
F1AH0688 FT-3KL F7555GB 121.0 30.0 100.0 100.0 - - - - 50.0
F1AH0691 FT-3KL F140100PB 181.0 42.0 162.0 160.0 - - - - 95.0
Product Code P/N Ae (mm2) Typical Lm (mm) Typical Weight (g) Typical Applied Screw AL value (uH/N2) Shape
I J 10kHz 100kHz
F1AH0687 FT-3KL F6045GB 107.3 166.0 193.0 M4 M5 13.1 ~ 24.3 13.8 ±30% Combined
F1AH0688 FT-3KL F7555GB 146.3 205.0 377.0 - M6 14.4 ~ 26.8 15.2 ±30% Base plate
F1AH0690 FT-3KL F11080GB 213.8 300.8 613.0 M5 M6 14.4 ~ 26.7 15.2 ±30% Combined
F1AH0691 FT-3KL F140100PB 427.5 380.1 1595.0 - M6 22.8 ~ 42.3 24.0 ±30% Base plate
 

SINGLE-PHASE CORES

For the designer interested in winding an inductor for a specific application we have available the following standard cores for single-phase common mode choke coils requirements. These are toroidal-shaped tape-wound cores made from nanocrystalline amorphous metal.

These cores are inserted into a protective plastic case made from a UL94 V-0 certified resin (130℃: PBT, 155℃: PET heat resistance). The case has built-in winding separators to add in creepage and dialectic isolation requirements. The below table lists; Product code and part number for cores made with FT-3KM material and the new FT-3KM50T upgraded version of FT-3KM.
 

FT-3K50T - K SERIES

Group of single phase FT-3K50T nanocrystalline common-mode choke cores Mechanical details of single phase FT-3K50T nanocrystalline common-mode choke core
Product Code P/N Finished Dimensions (mm) Ac (mm2) TYP Lm (mm) TYP Wt (g) TYP AL value (µH/n2)
A ±0.7 B ±0.7 C ±0.5 D ±0.7 E REF F REF G REF 10kHz MIN 100kHz ±30%
F1AH0538 FT-3KM K1208A 13.0 7.1 6.0 10.7 2.6 - 1.8 7.7 30.3 2.9 18.2 5.8
F1AH0692 FT-3KM K1208C 13.5 12.5 6.8 15.5 3.2 - 1.5 13.3 31.7 4.5 24.0 8.8
F1AH0654 FT-3KM K1812A 20.2 8.1 10.3 13.1 3.5 - 2.5 11.3 47.1 5.8 14.7 5.3
F1AH0693 FT-3KM K1912C 21.1 13.3 10.0 18.3 3.5 - 2.5 24.4 48.9 13.0 28.2 10.6
F1AH0694 FT-3KM K2313D 25.2 15.1 11.5 20.7 3.5 - 2.8 43.9 57.3 23.0 41.6 15.3
F1AH0695 FT-3KM K2214B 24.2 10.6 12.0 16.2 4.0 - 2.8 22.2 56.5 13.0 22.2 8.1
F1AH0696 FT-3KM K2515D 27.2 15.6 13.0 21.2 3.5 - 2.8 46.3 62.8 26.0 41.6 15.3
F1AH0697 FT-3KM K2818E 30.4 18.0 15.8 24.0 3.5 1.5 3.0 55.5 72.3 37.0 43.4 15.9
F1AH0699 FT-3KM K3819D 40.4 15.5 16.8 23.5 4.0 2.0 4.0 87.9 89.5 68.0 55.5 20.4
F1AH0700 FT-3KM K3824G 40.6 23.0 21.4 31.0 4.0 2.0 4.0 105.0 97.4 87.0 61.0 24.4
F1AH0701 FT-3KM K5328E 56.4 19.0 24.6 29.0 5.5 2.0 5.0 127.5 114.7 155.0 62.5 25.0
 

FT-3KM - K SERIES

Group of single phase FT-3KM nanocrystalline common-mode choke cores Mechanical details of single phase FT-3KM nanocrystalline common-mode choke core
Product Code P/N Finished Dimensions (mm) Ac (mm2) TYP Lm (mm) TYP Wt (g) TYP AL value (µH/n2)
A ±0.7 B ±0.7 C ±0.5 D ±0.7 E REF F REF G REF 10kHz MIN 100kHz ±30%
F1AH1128 FT-3K50T K1208AS 13.7 7.8 5.5 11.4 2.6 - 1.8 7.7 30.3 2.9 16.6 10.3
F1AH1129 FT-3K50T K1208CS 14.2 13.2 6.3 16.2 3.0 - 1.5 13.3 31.7 4.5 26.9 16.7
F1AH1130 FT-3K50T K1812AS 20.9 8.8 9.8 13.8 3.5 - 2.5 11.3 47.1 5.8 13.2 8.2
F1AH1131 FT-3K50T K1912CS 21.8 14.0 9.5 19.0 3.5 - 2.5 24.4 48.9 13.0 32.6 20.2
F1AH1132 FT-3K50T K2313DS 25.9 15.8 11.0 21.4 4.0 - 2.8 43.9 57.3 23.0 50.8 31.5
F1AH1133 FT-3K50T K2214BS 24.9 11.3 11.5 16.9 4.0 - 2.8 22.2 56.5 13.0 25.8 16.0
F1AH1134 FT-3K50T K2515DS 27.9 16.3 12.5 21.9 3.5 - 2.8 46.3 62.8 26.0 46.9 29.1
F1AH1135 FT-3K50T K2818ES 31.1 18.7 15.3 24.7 3.5 1.5 3.0 55.5 72.3 37.0 49.0 30.4
F1AH1136 FT-3K50T K3819DS 41.1 16.2 16.3 24.2 4.0 2.0 4.0 87.9 89.5 68.0 62.5 38.7
F1AH1137 FT-3K50T K3824GS 41.3 23.7 20.9 31.7 4.0 2.0 4.0 105.0 97.4 87.0 67.4 41.8
F1AH1138 FT-3K50T K5328ES 57.1 19.7 24.1 29.7 5.5 2.0 5.0 127.5 114.7 155.0 71.1 44.1

THREE-PHASE CORES

Three phase nanocrystalline common-mode choke core

For the designer interested in winding common mode choke coils for a specific application, we have available the following standard cores for three-phase phase common-mode chokes.

These are toroidal-shaped tape-wound cores made from nanocrystalline amorphous metal.

These cores are inserted into a protective plastic case made from a UL94 V-0 certified resin (130℃: PBT, 155℃: PET heat resistance). The case has built-in winding separators to add in creepage and dialectic isolation requirements. The below table lists: Product code and part number for cores made with FT-3KM material.

Two parts of a three phase nanocrystalline common mode core. and complete assembly shown
 

FT-3KM N SERIES - NANOCRYSTALLINE "M TYPE" TOROIDAL CORES – THREE-PHASE CASE

Mechanical details three phase common mode choke cores made from FT-3
PCB mounting details three phase common mode choke cores made from FT-3
Product Code P/N Finished Dimensions (mm) Ac (mm2) TYP Lm (mm) TYP Wt (g) TYP AL value (µH/n2)
A ±0.7 B ±0.7 C ±0.5 D ±0.7 E REF F REF G REF 10 kHz MIN 100 kHz ±30%
F1AH0702 FT-3KM N2515D 27.6 16.0 12.6 22.0 3.2 1.0 3.0 46.9 62.8 28 41.6 15.3
F1AH0703 FT-3KM N3320E 35.6 17.4 19.0 27.0 3.2 1.5 4.0 73.1 73.3 56 49.7 19.9
F1AH0704 FT-3KM N4225E 46.0 19.0 21.0 27.0 4.0 3.0 4.0 95.6 105.2 95 51.4 20.6
F1AH0705 FT-3KM N5034E 54.0 19.0 30.0 29.0 4.0 - 5.0 90.0 131.9 110 38.6 15.4
F1AH0706 FT-3KM N6442E 68.0 19.0 38.0 29.0 5.0 - 5.0 123.8 166.5 184 42.0 16.8
F1AH0708 FT-3KM N5434G 58.0 25.0 30.0 47.0 6.2 8.0 7.0 150 138.0 210 64.1 24.5

Download EMC brochure for information on common mode components:

WOUND COMMON CHOKES USING NANOCRYSTALLINE MATERIAL

Standard wound common mode choke coils and common-mode chokes are available as standard products for DC and single-phase AC power lines (rated current from 5A to 40A) and for three-phase AC power lines (rated current from 3A to 600A).

Single-phase horizontal mount

Common mode chokes - single-phase horizontal mount option

Single-phase vertical mount

Common mode chokes - single-phase vertical mount option

Three-phase wound components

Custom common mode chokes are available upon request, for your application you can pick the standard product that most closely meets your needs, or fill out our request form for a recommendation.

Typical applications include various portions of the power supply/inverter such as input single and three-phase noise filters, active harmonic filters, output noise filters, DC Power Lines, or Signal Lines.
Mounting three phase common-mode nanocrystalline choke coils Mounting three-phase common mode choke coils

LARGE THREE-PHASE WOUND COMPONENTS

Mounting large common mode choke coils

Download EMC brochure for information on common mode components:

Nanocrystalline Amorphous Metal

Molecular structure of Nanocrystalline Amorphous Metal Field annealing of Nanocrystalline material

Nanocrystalline amorphous metal is produced by rapidly quenching a molten alloy to produce an amorphous metal (similar to Metglas®) and then heat treating this alloy at a higher than its crystallization temperature. Heat treating the amorphous ribbon in this matter creates Nanocrystalline grains that are approximately 10nm in size.

  Annealing changes BH loops We produce three types of Nanocrystalline material:
  • M-type material is Nanocrystalline material with no magnetic field applied during annealing.
  • H-type material is formed by annealing with a magnetic field applied parallel to the ribbon’s surface, creating a squarer BH loop.
  • L-type material is formed by annealing with a magnetic field applied perpendicular ribbon’s surface, creating a flatter BH loop.
  Advantages are:
  • High saturation magnetic flux density, more than 1 Tesla
  • High permeability over 10,000u at 100kHz
  • Excellent temperature characteristics. Very high Curie temperature (570°C) resulting in small permeability variation (less than +/-10%) at a temperature range of -40°C to 150°C.
General Informational Brochure

How amorphous ribbon is made

How amorphous ribbon is made , (similar to Metglas®)

The casting process - Amorphous ribbon (similar to Metglas®), is cast in widths up to 8 inches wide and then is slit to the width required for winding. Special winding machines wind the ribbon into various Toroidal, Oval, and C-core shapes. Cores then are further processed via cutting, coating, and annealing according to standard offerings and customer requests.