Nanocrsytalline Core VS Amorphous Core
Specs Compare: Nanocrsytalline VS Amorphous
Side-by-side properties of Amorphous Magnetic Cores and Nanocrystalline Magnetic Cores for inductors, current transformers, chokes, and EMI filters.
| Property | Amorphous Core | Nanocrystalline Core |
|---|---|---|
| Material | Fe-based amorphous alloy (metallic glass) | Fe-based nanocrystalline alloy (ultra-fine grains) |
| Relative Permeability (μr) | ~5,000 – 80,000 (grade/heat-treat dependent) | ~80,000 – 150,000 (application tuned) |
| Saturation Flux Density (Bs) | ~1.56 T (higher Bs) | ~1.2 T |
| Core Loss | Very low at low–mid frequencies | Extremely low from mid–high frequencies |
| Typical Frequency Use | Mains to tens of kHz; low–mid kHz power stages | Tens to hundreds of kHz; wide-band EMI/chokes |
| Thermal Stability | −40 – 130 °C (typ.) | −40 – 150 °C (typ.) |
| Common Forms | Toroid, C/E, coated/cased; gapped & cut cores | Toroid, C/E, coated/cased; gapped & split cores |
| Cost | More cost-effective | Higher cost, superior loss/μ performance |
| Mechanical Robustness | More mechanically robust, less brittle and less prone to breakage | More brittle, easier to crack or chip during handling |
| Typical Uses | Power transformers, PFC/storage chokes, low-mid kHz EMI filters | High-performance EMI filters, common/differential-mode chokes, compact high-kHz inductors |