Crafted from premium-grade 1K107B nanocrystalline ribbon, this toroidal nanocrystalline core boasts well-balanced, superior magnetic characteristics. It reaches an initial permeability of 80,000 and a peak permeability of 300,000, alongside a saturation flux density of 1250 mT. The core retains steady magnetic performance over an extensive temperature span from -50°C to 150°C, with a Curie temperature of 570°C. Every finished unit undergoes rigorous visual checks to limit surface flaws, securing stable, repeatable quality for bulk orders. Its compact geometry — outer diameter 28.8 mm, inner diameter 16.6 mm, height 12.6 mm — facilitates straightforward winding and assembly for diverse inductive parts.

This nanocrystalline toroidal core finds broad deployment within power electronics and EMC fields. It suits domestic power supply units, industrial control enclosures, telecom power modules, new-energy charging hardware and medical power assemblies. It is also ideal for signal filtering blocks, lightning protection modules and high-accuracy testing instruments requiring reliable common-mode noise attenuation.

This toroidal nanocrystalline core is primarily wound with enameled copper wire to build high-performance common-mode chokes for EMC filter circuits. It attenuates common-mode EMI on power and signal lines, enabling end electronic devices to pass mandatory EMC compliance tests. Custom winding configurations and insulation schemes can be tailored to your specific circuit layout, delivering targeted filtering results across varying current and frequency operating points.

Q: Why do amorphous cores offer better low-frequency filtering performance than ferrite cores?

 A: Amorphous material maintains higher permeability at low frequencies. It delivers stronger impedance for low-frequency common-mode noise and does not saturate easily under heavy current.

Q: Is post annealing required for amorphous cores before winding?

 A: Standard amorphous cores from our factory are already fully annealed. Extra heat treatment is unnecessary unless you have special customized magnetic parameter requirements.

Q: What safety precautions should we take during core winding?

A: Avoid sharp scratches on the ribbon surface. Excessive tension during winding may damage the thin alloy strip and degrade the core’s magnetic performance.

Q: Are amorphous cores suitable for high pulse-current working conditions?

A: Yes, thanks to their high saturation flux density. They handle transient pulse current well, which makes them a solid pick for power conversion and surge suppression circuits.

Q: Can amorphous cores be used together with ferrite cores in one filter circuit?

 A: This hybrid design is feasible. Amorphous cores handle low-frequency interference, while ferrite cores take charge of high-frequency noise to achieve wideband filtering.