What is a Medical-Grade Nanocrystalline Core?
Medical-grade isolation transformers require ultra-stable, low-loss magnetic cores that can ensure patient safety, device isolation, and continuous performance. Our nanocrystalline cores, made from Fe-based alloys, are engineered for superior magnetic efficiency and thermal reliability in critical applications such as ventilators, MRI systems, patient monitors, and surgical equipment.
These toroidal or C-cut cores exhibit nanostructured grain sizes (12~20 μm), giving them a combination of high permeability, high saturation, and extremely low core loss—essential for precision medical power systems.
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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High Magnetic Saturation (Bs = 1.2T)
Allows compact transformer designs while handling peak current without saturation.
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Ultra-Low Core Loss
Thanks to nanocrystalline structure and optimized annealing, loss is typically under 10 W/kg @ 20 kHz—ideal for 24/7 hospital-grade operation.
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Broad Operating Temperature Range
Stable magnetic performance from –40°C to +140°C; Curie temperature rated at 570°C ensures long-term thermal reliability.
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High Electrical Resistivity (ρ ≈ 100 µΩ·cm)
Greatly suppresses eddy current losses in high-frequency circuits.
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Low Magnetostriction (λs = 2~3)
Reduces mechanical noise and vibration — critical in silent, patient-focused environments.
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Custom Dimensions Available
OD from 4 mm to 140 mm; cross-sectional areas and inductance values fully tailored for your medical device needs.
Advantage
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Galvanic Isolation: Meets stringent medical safety regulations by ensuring patient-to-device insulation.
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Silent Operation: Low magnetostriction and low core loss result in nearly silent transformer operation — ideal for ICU and diagnostic rooms.
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Compact & Lightweight: High permeability enables fewer windings and smaller form factor, essential in portable medical equipment.
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Reliable in Emergency: High saturation and thermal resistance ensure reliable function during power surges or high-load events.
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EMC Safe: Helps suppress EMI/RFI to protect sensitive analog and digital signals in medical instruments.
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 Nanocrystalline 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!
