Metglas - Magnaperm

High Frequency High Permeability Cores Technical Bulletin             
                   
MAGNAPERM® High Permeability Toroidal Cores are manufactured with cobalt-based METGLAS® amorphous alloy 2714A for high frequency applications. These flat loop toroidal cores offer a unique combination of ultra-high permeability, high saturation flux density and extremely low core loss for electronic component designers.

These properties make METGLAS MAGNAPERM® cores ideal for a diverse range of applications such as:

  • EMI common mode filtering
  • Telecommunications and data communications interface transformers
  • High accuracy current transformers
  • High accuracy pulse transformers
  • Ground fault protection devices

Standard sizes are available from 9.6 mm to 34.1 mm OD and the possibility of manufacturing custom sizes also exists. Core coatings meeting UL94V-0 and temperature class F are available upon request.

Benefits

  • Higher initial permeabiliy – which reduces the number of turns
  • High permeability over a wide range of operating frequencies
  • High attenuation – reduces the need for multi stage filtering
  • Low profile – enabling weight and volume reduction up to 50 %
  • Low loss – as a result of microthin METGLAS® ribbon (18µm)

Physical Properties METGLAS® ALLOY 2741AF

Ribbon Thickness(µm): 18
Density (g/cm³): 7.59
Thermal Expansion (ppm/°C): 12.7
Crystallization Temperature (°C): 560
Curie Temperature (°C): 225
Continuous Service Temperature (°C): 90
Tensile Strengh (MN/m²): 1k-1.7k
Elastics Modulus (GN/m²): 100-110
Vicker´s Hardness (50g load): 960

Magnatic Properties METGLAS POWERLITE® Cores

Saturation Flux Density (Telsa): 0.57
Permeability (µ@1 kHz, 2.0mA/cm): >72,000
Saturation Magnetostriction (ppm): <<1
Electrical Resistivity (µ-Ω-cm): 142

CORE NUMBER OD (mm) ID (mm) HT (mm) /m (cm) Ac (cm²) MASS (g) VOL (cm³) ALmin* (µH) Wa (cm) WaAc (cm4) Core Factor**
MP1305P4AF 14.4 7.9 6.7 3.46 0.057 1.5 0.20 14.9 0.49 0.028 0.063
MP1405P4AF 15.8 7.9 6.7 3.67 0.083 2.3 0.30 20.4 0.49 0.040 0.073
MP1805P4AF 20.8 110.8 6.8 4.88 0.11 4.0 0.53 20.1 0.92 0.099 0.136
MP1506P4AF 17.1 7.8 8.3 3.86 0.14 4.1 0.54 32.8 0.48 0.067 0.092
MP1906P4AF 21.2 11.0 8.3 4.99 0.16 6.1 0.80 29.3 0.96 0.155 0.172
MP2705P4AF 29.5 14.8 6.7 6.89 0.21 10.8 1.42 27.1 1.72 0.356 0.298
MP2008P4AF 22.2 11.0 10.4 5.15 0.25 9.7 1.28 43.5 0.96 0.238 0.210
MP2410P4AF 27.8 17.3 11.5 6.83 0.21 10.7 1.41 27.3 2.34 0.483 0.407
MP2510P4AF 27.8 17.3 11.5 7.01 0.25 13.2 1.74 32.1 2.34 0.583 0.441
MP3210P4AF 35.0 19.9 11.5 8.58 0.39 25.2 3.33 40.9 3.10 1.20 0.659
High Permeability Cores Standard Core Sizes
High Permeability Cores Standard Core Sizes