Current Transformer Cores 2019-02-03T18:39:44+00:00

Nanocrystalline Current Transformer Cores


Current transformer is refers to the device with the function of collecting signal in the circuit, is the big electric current into a small current transformer, using the electromagnetic induction principle to change current components of the value, the alternating current (ac) into converter available for applications or measuring instrument, relay equipment.


  •  High initial permeability: Larger insert loss, better inhibiting effect on conducted interference than ferrite.

  • High saturation induction: about 2-3 times higher than ferrite, hardly magnetized to saturate in the cases of current strong interference.

  •  Excellent temperature stability: higher Curie temperature, the changes in alloy performance obviously lower than ferrite under the circumstance of larger temperature fluctuations, showing excellent temperature stability

  • Flexible frequency characteristic: More flexible to obtain the required frequency characteristic through adjustment process.

Physical Properties 

Saturation Magnetization(Bs)1.25TSaturation Magnetostrictive Coefficient(λs)<2×10-6
Curie Temperature(Tc)560℃Density(d)7.3g/cm3
Crystallization Temperature(Tx)510℃Resistivity(ρ)130μΩ-cm
Hardness(Hv)800Continuous Operating Temperature Range-55~130℃

Magnetic Properties

Annealing MethodNon-magnetic Annealing
Initial Permeability>150,000
Maximum Permeability>600,000
Residual Magnetic Flux Density0.6T
Iron Loss P(20kHz,0.5T)<25W/kg
Iron Loss P(100kHz,0.3T)<150W/kg
Iron Loss Change Rate (-55℃~125℃)<15%
"Amorphous Inductor"


  • Switching power supply

  • Dry type current transformer

  • Pouring type current transformer

  •  Oil-immersed type current transformer

  • Gas insulated current transformer

  • Measuring level current transformer

  • Precision measuring instrument

  • Watt-hour meter level transformer and protection current transformer

Performance Curves

Core Dimension

OD-Outside Diameter ;  ID-Inside Diameter ; HT- Height


Cores with other specifications can be provided concerning to customer demand.

Ask us for price and solution today!

Your inquiry will be replied within 24 hours,and we respect your privacy.