What is a Nanocrystalline Core for Magnetic Amplifiers?
Dongguan JH Amorphous nanocrystalline cores are specially designed for magnetic amplifiers (Mag-Amps) used in high-frequency switching power supplies. Made from Fe–Cu–Nb–Si–B nanocrystalline alloy, these cores offer ultra-high permeability, low coercivity, and a rectangular B-H curve. They provide stable, reliable performance with low core loss, making them ideal for precise voltage regulation and energy-efficient designs.
Specifications
| Saturation flux density induction |
1.20T |
| Permeability @ 10KHz |
>80000 |
| Permeability @ 100KHz |
>20000 |
| Curie temperature |
570 °C |
| Stacking factor |
0.8 |
| Resistivity |
115 μΩ.cm |
| Working Temperature |
-40 ~ 140°C |
| Density |
7.2 g / cm3 |
| Ribbon Thickness |
12 ~ 20 μm |
| Core shapes |
Troidal core / C Core / Customizable |
| Finish |
Coating / Casing / Customizing |
Key Features
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Ultra-High Permeability & Low Coercivity
Enables fine control of magnetic amplification with minimal hysteresis, ideal for feedback control loops.
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Rectangular Magnetic Curve & Excellent Linearity
Supports precise modulation and low reset current requirements, improving amplifier response time.
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Low Core Loss at High Frequencies
Optimized for switching frequencies up to 100 kHz with core loss typically between 4–8 W/kg at 20 kHz.
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Wide Operating Temperature Range
Performs reliably from –40°C to +140°C, with a Curie temperature up to 570°C ensuring long-term thermal stability.
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Low Magnetostriction & Silent Operation
Minimal mechanical noise makes them suitable for noise-sensitive applications like telecom and medical power supplies.
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High Electrical Resistivity (~130 µΩ·cm)
Reduces eddy current losses, enabling efficient performance at high frequency.
Advantage
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Precision Regulation – Stable performance under magnetic feedback for voltage control.
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High Efficiency – Reduced losses improve thermal performance and extend component life.
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Compact Design – High flux density enables smaller magnetic components and board area savings.
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Thermal Reliability – Excellent temperature tolerance for continuous operation.
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Customization Available – Dimensions, coatings, and mounting features can be tailored to your system requirements.
Custom Options
| Parameter |
Specification |
| Outer Dimensions |
4 ~130 mm |
| Core Material |
Fe-based Nanocrystalline / Fe-based Amorphous |
| Inductance & Impedance |
Customizable upon request |
Customized sizes, inductance values, and coating types are available. Contact us for technical consultation and design support.
Why Choose Dongguan JH Amorphous Cores
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Precision manufacturing with consistent quality
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Space-saving design optimized for modern electronic systems
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Rapid prototyping and flexible production scalability
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Full compliance with RoHS/REACH environmental regulations
Certificates
Dongguan JH Amorphous, a leading professional one-stop amorphous cores manufacturer.
We offer magnet solutions from design to worry-free after-sales. Let talk about your distinct project now!
