Coating Nanocrsytalline Core
Toroidal Coating Nano Core
High-permeability Nanocrystalline Core with protective coating for compact builds. Low core loss across a wide frequency range delivers cool, efficient chokes and filters. The smooth coated surface protects the ribbon edge and improves winding quality.
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DG Focus Technology Co., Ltd. · Custom designs · Fast sampling · Reliable mass production
Key Highlights
High permeability
Typical μr 80k–150k for higher inductance and smaller size.
Low core loss
Efficient at mid-/high-frequencies for lower temperature rise.
Protective coating
Improves insulation, protects edges, and enhances winding reliability.
Compact footprint
Space-saving toroids ideal for dense power designs.
Thermal stability
Stable performance from −40–150 °C with low drift.
Turnkey service
Design optimization, gapping, winding, varnish/potting, and fast sampling.
Typical Applications
PFC / Energy Storage Chokes
Server PSUs, chargers, industrial drives
EMI Filters
Common-mode & differential-mode inductors
PV / ESS / UPS Inverters
DC-Link and LCL filtering
On-board Chargers & DC Fast Charging
High power density with low loss
Welding / Induction Heating
High-frequency, high-current environments
Current Sensing
CTs and precision measurement
Key Specifications
| Core Material | Fe-based Nanocrystalline alloy (rapidly quenched; similar to FINEMET) |
|---|---|
| Protective Coating | Voltage-proof insulating coating; options for color and class |
| Relative Permeability μr (typ.) | 80,000–150,000 (tuned per application & heat treatment) |
| Saturation Flux Density Bs (typ.) | ≈ 1.2 T |
| Ribbon Thickness | 18–25 µm common (others on request) |
| Operating Temperature | −40–150 °C (consult for higher ranges) |
| Core Loss | Low loss in mid-/high-frequency range; ideal for high-switching topologies |
| Available Forms | Toroid (coated), custom sizes on request |
| Compliance | RoHS / REACH friendly; Hi-Pot insulation options available |
We provide typical engineering ranges. Please refer to final datasheets and drawings for ordering.
FAQ
Why choose a coated nanocrystalline toroid?
The coating protects the ribbon edge, enhances insulation, and helps achieve neat, repeatable winding—ideal for compact, high-efficiency designs.
How does it compare with cased toroids?
Coated toroids maximize compactness and cost-efficiency. Cased toroids simplify handling of thick wire and speed up assembly. Choose based on window requirement and assembly method.
Do you support non-standard sizes and colors?
Yes. We can customize size, permeability target, coating class, and color to match your specifications.
Need a quick recommendation or sample?
Share your inductance, frequency, current, size limits, and thermal targets. We will propose core grade, geometry, and turns with a loss/temperature estimate.