1K101 Fesib Toroidal Amorphous Core for Enhanced Electric Transformer Performance
Oct 28, 2025
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A toroidal amorphous core's primary features are its low core losses and high permeability, stemming from its non-crystalline, disordered atomic structure. This results in high efficiency, a compact size, and reduced EMI and acoustic noise compared to traditional cores. They are widely used in applications like high-efficiency power supplies, inverters, and noise suppression chokes.
toroidal amorphous core Applications
- High-efficiency power supplies
- Inverters
- Renewable energy solutions
- Noise suppression and current transformers
- DC/DC converters in mobile and automotive applications
amorphous core Comparison with silicon steel cores
| Feature | Amorphous Toroidal Cores | Silicon Steel Cores |
|---|---|---|
| Core Loss | Significantly lower, resulting in higher efficiency | Higher due to crystalline structure |
| Saturation | Higher saturation flux density, more resistant to saturation | Lower saturation flux density |
| Frequency | More efficient at higher frequencies | Better suited for lower frequencies |
| Efficiency | Typically 95% to 98% efficiency | Often 94% or less efficiency |
| Cost | Higher cost | Lower cost |
| Ideal Applications | Power supplies, renewable energy, EVs, and applications with extended idle periods | High power, high load applications where cost is a primary factor |
amorphous core Comparison with other core types
| Core Type | Frequency Range | Advantages | Disadvantages |
|---|---|---|---|
| Amorphous | Medium-high | High permeability, low core loss, high saturation flux density, good high-frequency performance | Higher cost |
| Ferrite | High | Good for low and medium frequencies, low cost | Lower saturation flux density than amorphous cores |
| Powdered Iron | Medium to high | Suitable for medium to high frequencies | Lower performance in other areas compared to amorphous cores |
Key takeaways
Choose amorphous cores for applications where efficiency, low no-load losses, and high-frequency performance are critical, such as in renewable energy systems or power supplies.
Choose silicon steel cores for applications with high power and load requirements where cost is a major consideration.
Consider ferrite or powdered iron cores for lower and medium-frequency applications where space is not a constraint and cost is a significant factor.
amorphous ring core specification
| Magnetic core size(mm) | Protective box size(mm) | Effective cross-sectional area Ae(mm2) | Magnetic path length Ie(mm) | Maximum DC overcurrent class (A) |
||||||
| id | od | ht | ID | OD | HT | |||||
| 14 | 19 | 6.5 | 12 | 22 | 8 | 11.86 | 51.81 | 20 | ||
| 14 | 20 | 10 | 12 | 22.3 | 11.4 | 29.68 | 52.29 | 40 | ||
| 16 | 21 | 10 | 15 | 24 | 12.3 | 24.85 | 57.41 | 60 | ||
| 16 | 23 | 8 | 15 | 24 | 9.7 | 20.44 | 61.23 | 60 | ||
| 16 | 23 | 10 | 15 | 24 | 12.3 | 34.62 | 59.92 | 60 | ||
| 17 | 22 | 10 | 15.3 | 24.4 | 12.3 | 24.86 | 60.59 | 60 | ||
| 17 | 21 | 8 | 15.3 | 24 | 9.7 | 25.56 | 60.67 | 60 | ||
| 17 | 23 | 8 | 15.3 | 24.4 | 9.7 | 26.89 | 61.34 | 60 | ||
| 18 | 23 | 10 | 16.4 | 24.4 | 12.3 | 29.78 | 60.38 | 70 | ||
| 18 | 24 | 9 | 16.4 | 25 | 11.2 | 34.78 | 60.89 | 70 | ||
| 18 | 25 | 10 | 16.4 | 25.9 | 12.3 | 37.97 | 64.56 | 70 | ||
| 19 | 24 | 9 | 17.3 | 25 | 11.2 | 40.39 | 65.32 | 80 | ||
| 19 | 25 | 10 | 17.3 | 26 | 12.3 | 39.42 | 62.31 | 80 | ||
| 19 | 26 | 10 | 17.3 | 27.3 | 12.3 | 48.32 | 69.56 | 80 | ||
| 20 | 25 | 10 | 18.5 | 26.3 | 12.3 | 39.29 | 70.32 | 90 | ||
| 20 | 28 | 10 | 18.5 | 29 | 12.3 | 45.76 | 73.88 | 90 | ||
| 20 | 32 | 10 | 18.5 | 32.3 | 12.3 | 58.91 | 78.75 | 90 | ||
| 21 | 29 | 10 | 18.2 | 31.3 | 12.3 | 39.65 | 77.19 | 100 | ||
| 21 | 26 | 8 | 18.3 | 27.4 | 9.7 | 46.54 | 78.32 | 100 | ||
| 21 | 28 | 10 | 18.3 | 30 | 12.3 | 50.39 | 77.45 | 100 | ||
| 22 | 28 | 10 | 20.5 | 30 | 12.3 | 49.32 | 79.89 | 120 | ||
| 22 | 32 | 10 | 20.5 | 33.4 | 12.3 | 43.58 | 73.43 | 120 | ||
| 23 | 32 | 10 | 21.3 | 33.4 | 12.3 | 44.56 | 74.56 | 120 | ||
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