Size marking on the case is the bare core dimension (OD × ID × H), not the cased or finished size.
Nanocrystalline toroidal core 90×60×20 mm
90×60×20 mm nanocrystalline toroidal core, Black 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-090-060-020-HFBK is a 90×60×20 mm nanocrystalline toroidal core for high-current EMI filters, large cable-bundle chokes, and industrial power conversion 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
$102.601 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
- high-current EMI filters
- large cable-bundle chokes
- industrial power conversion filters
- busbar EMI suppression
- high-power industrial common-mode EMI filters
- large cable-bundle/multi-conductor chokes
- industrial power conversion EMI suppression cores
- busbar/switchgear EMI filter chokes
When to choose this size
This 90×60×20 mm toroidal core is sized for high-current EMI filters and related designs in the nearby size family. Step down to the 65×50×25 mm core when board space, enclosure height, or a tighter footprint matters more than winding room. Move up to the 100×80×20 mm core when you need a larger outer diameter, winding window, or higher throughput than this part can comfortably support. In short, pick CCNT-090-060-020-HFBK when your design for high-current 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 90×60×20 mm geometry (Ae 2.5 cm², Le 23.5 cm). The winding must fit the finished window: cased ID is 55 mm, not the 60 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 90×60×20 mm size marked on the case is the bare core (OD × ID × H). Finished cased size is 94 × 55 × 24 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 high-current EMI filters, including high-power industrial common-mode EMI 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?
Choose the 100×80×20 mm core when you need more winding window, heavier wire, or higher throughput. Choose the 65×50×25 mm core when board space or a smaller footprint matters more than this 90×60×20 mm envelope.
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