Size marking on the case is the bare core dimension (OD × ID × H), not the cased or finished size.
Nanocrystalline toroidal core 65×50×25 mm
65×50×25 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-065-050-025-HFBK is a 65×50×25 mm nanocrystalline toroidal core for EV charger input filters, industrial drive EMI chokes, and large cable-bundle CM 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
$49.321 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
- EV charger input filters
- industrial drive EMI chokes
- large cable-bundle CM filters
- renewable energy inverter filters
- EV charging station input common-mode EMI filters
- high-power industrial drive EMI suppression cores
- large cable-bundle/busbar common-mode filters
- utility-scale renewable energy inverter filters
When to choose this size
This 65×50×25 mm toroidal core is sized for EV charger input filters and related designs in the nearby size family. Step down to the 50×32×15 mm core when board space, enclosure height, or a tighter footprint matters more than winding room. Move up to the 90×60×20 mm core when you need a larger outer diameter, winding window, or higher throughput than this part can comfortably support. In short, pick CCNT-065-050-025-HFBK when your design for EV charger input 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 65×50×25 mm geometry (Ae 1.57 cm², Le 18 cm). The winding must fit the finished window: cased ID is 46.8 mm, not the 50 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.
Frequently asked questions
Are stated dimensions bare or cased?
The 65×50×25 mm size marked on the case is the bare core (OD × ID × H). Finished cased size is 68.3 × 46.8 × 28.9 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 EV charger input filters, including EV charging station input 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 90×60×20 mm core when you need more winding window, heavier wire, or higher throughput. Choose the 50×32×15 mm core when board space or a smaller footprint matters more than this 65×50×25 mm envelope.
Related products
Nanocrystalline toroidal core 50×32×15 mm
CCNT-050-032-015-HFWH
50×32×15 mm
View CCNT-050-032-015-HFWH specsNanocrystalline toroidal core 50×32×15 mm
CCNT-050-032-015-MFBL
50×32×15 mm
View CCNT-050-032-015-MFBL specsNanocrystalline toroidal core 45×30×15 mm
CCNT-045-030-015-HFBK
45×30×15 mm
View CCNT-045-030-015-HFBK specsNeed this core for your application?
Get pricing, availability, and winding support for CCNT-065-050-025-HFBK.