Size marking on the case is the bare core dimension (OD × ID × H), not the cased or finished size.
Nanocrystalline toroidal core 30×20×10 mm
30×20×10 mm nanocrystalline toroidal core, White PBT Class B 130C.
Soft-published ahead of stock. Expected availability October 20, 2026. The image is a dimension diagram; product photos will be added when inventory arrives.
CCNT-030-020-010-HFWH is a 30×20×10 mm nanocrystalline toroidal core for VFD/motor drive EMI filters, three-phase line filters, and industrial SMPS filters. Its nanocrystalline HF characteristic supports common-mode and EMI filter designs where impedance and winding window matter as much as size. Choose this size when the filter or choke needs this window and OD, not the next larger footprint.
Arriving October 20, 2026
$6.481 piece
This SKU is soft-published for selection and SEO. Product photos will be added when stock arrives. Request a quote now, or join the waitlist for an in-stock notice.
Technical Specifications
Bare core dimensions
Cased / finished dimensions
Magnetic properties
Finish and handling
Environmental
Applications and selection
Applications
- VFD/motor drive EMI filters
- three-phase line filters
- industrial SMPS filters
- inverter output chokes
- variable-frequency drive (VFD) input/output common-mode filters
- three-phase AC line EMI filter chokes
- industrial SMPS EMI suppression cores
- inverter output dv/dt filter chokes
When to choose this size
This 30×20×10 mm toroidal core is sized for VFD/motor drive EMI filters and related designs in the nearby size family. Step down to the 25×20×10 mm core when board space, enclosure height, or a tighter footprint matters more than winding room. Within the same 30 mm OD, the 30×20×12 mm core adds stack height and Ae when you need more VA or easier secondary winding without growing the outer diameter. Move up to the 32×20×15 mm core when you need a larger outer diameter, winding window, or higher throughput than this part can comfortably support. In short, pick CCNT-030-020-010-HFWH when your design for VFD/motor drive EMI filters fits this window and OD; pick a neighbor when compactness or power handling shifts the trade-off.
Winding notes
Magnetic calculations should use the bare 30×20×10 mm geometry (Ae 0.41 cm², Le 7.85 cm). The winding must fit the finished window: cased ID is 17.6 mm, not the 20 mm bare ID. Distribute common-mode windings evenly and keep leakage paths short for EMI filter performance. High permeability (μi 80,000) supports useful magnetizing inductance at practical turn counts; stay within 1.25 Tesla saturation and the -40°C to +130°C PBT Class B 130C limit.
Related application guides
Frequently asked questions
Are stated dimensions bare or cased?
The 30×20×10 mm size marked on the case is the bare core (OD × ID × H). Finished cased size is 33 × 17.6 × 13.2 mm. Use bare dimensions with Ae and Le for magnetic design, and the finished inner diameter for winding clearance.
Is this core suitable for EMI or common-mode filter work?
Yes. It is a nanocrystalline toroidal core commonly used for VFD/motor drive EMI filters, including variable-frequency drive (VFD) input/output common-mode filters. Size the turns and window for your common-mode impedance target while staying within saturation and temperature limits.
When should I choose a different size instead?
Within the same OD, choose the 30×20×12 mm core for more stack height and Ae. Move up to the 32×20×15 mm core for a larger outer diameter, or step down to the 25×20×10 mm core when board space matters more than this 30×20×10 mm envelope.
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