Dongguan JH Amorphous' Toroidal Coating Nanocrystalline Cores are engineered for precision electromagnetic interference (EMI) suppression and high-efficiency inductive components. With a compact toroidal geometry and uniform nanocrystalline microstructure, these cores offer outstanding magnetic performance across a wide frequency range, especial for high-frequency, making them ideal for high-end power electronics, automotive, industrial, and renewable energy applications.
Key Features
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Ultra-high Permeability
Permeability values exceeding 80,000 – ideal for compact, space-efficient choke designs.
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Exceptional Low Core Loss
Significantly lower than ferrite or amorphous materials at low and medium frequencies.
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Excellent Thermal Stability
Operates reliably from –40°C to +140°C, with stable performance under thermal cycling.
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Low Magnetostriction
Minimizes audible noise and mechanical stress, improving device lifespan and user comfort.
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Durable Coating
Epoxy or polyester coatings provide insulation, corrosion resistance, and mechanical protection.
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Compact Toroidal Shape
Offers minimal magnetic leakage, easy coil winding, and excellent field symmetry.
Typical Applications
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Common Mode Chokes
Superior EMI filtering in compact footprints for industrial drives, SMPS, and solar inverters.
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Inductors & Transformers
Suitable for differential mode inductors, flyback transformers, and push-pull converters.
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EV/HEV Onboard Chargers
High thermal and electrical stability make it ideal for automotive-grade EMI solutions.
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Smart Meters / Energy Systems
For precision current sensing and compact magnetic components.
Custom Options
| Parameter |
Range/Option |
| Outer Diameter |
4 mm – 130 mm (TYP) |
| Coating Type |
Epoxy, Polyester, Custom Colors |
| Magnetic Permeability |
20,000 – 100,000 (μₑ)
|
| Saturation Flux |
>1.2 T |
| Core Loss |
Ultra-low @10 kHz–100 kHz
|
Custom sizes, permeability classes, and coatings are available upon request. Contact us for design support.
Why Engineers Choose Dongguan JH Toroidal Cores
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Trusted material consistency and dimensional accuracy
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Expert support in magnetic design optimization
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Fast sampling and flexible batch production
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Reliable sourcing for automotive and industrial projects
Datasheet & 3D Drawing available upon request.
Need help with magnetic selection?
Our engineers team are ready to assist you with simulations, prototyping, and integration guidance.
