Nanocrystalline toroidal core 20×12×10 mm
20×12×10 mm nanocrystalline toroidal core, Blue colored Powder Coating.
CCNT-020-012-010-LFBL is a 20×12×10 mm nanocrystalline toroidal core with Blue powder coating. Bare size is 20×12×10 mm. Finished (coated) size is 20.3×11.7×10.3 mm.
Former part number: CCNT-020-012-008-LFBL
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Request QuoteTechnical Specifications
Bare core dimensions
Cased / finished dimensions
Magnetic properties
AL is one turn through the window (Kelvin clips) at 0.3 V. It is not a 2 mT small-signal AL. At 1 kHz this drive saturates the smaller cores.
Finish and handling
Environmental
Product photos
Applications and selection
Recommended usage
- compact current sensing
- small transformers
- prototype magnetics
DIY & R&D usage
- DIY current-sensing builds
- benchtop transformer prototyping
- hobbyist magnetics experiments
Technical applications
- compact current sensing (powder-coated LF toroid)
- small transformers (powder-coated LF toroid)
- prototype magnetics (powder-coated LF toroid)
When to choose this size
Choose CCNT-020-012-010-LFBL when you need this 20×12×10 mm powder-coated toroid. Use the bare dimensions for the magnetic path and the finished inner diameter (11.7 mm) for winding clearance.
Winding notes
Magnetic calculations should use the bare 20×12×10 mm geometry (Ae 0.33 cm², Le 5.03 cm, stacking factor 0.82). AL is one turn through the window (Kelvin clips) at 0.3 V: 19 µH at 1 kHz, 15 µH at 10 kHz, and 2 µH at 100 kHz. This is not a 2 mT small-signal AL. At 1 kHz this drive saturates the smaller cores. Size the winding to the finished ID 11.7 mm, not the 12 mm bare ID. Saturation is 1.25 T. Core continuous temperature is -40°C to +150°C. Powder-coat temperature class is not published.
Related application guides
Frequently asked questions
Are the stated dimensions bare or finished?
The size in the product name is the bare core (20×12×10 mm). Finished coated size is 20.3×11.7×10.3 mm.
How was AL measured?
One turn: Kelvin clips through the window at 0.3 V. AL is 19 µH at 1 kHz, 15 µH at 10 kHz, and 2 µH at 100 kHz. This is not a 2 mT small-signal AL. At 1 kHz this drive saturates the smaller cores. Verify inductance on the wound part.
Where is a core this size used?
This 20×12×10 mm powder-coated toroid is used for compact current sensing and small transformers. The 11.7 mm finished window clears a small primary conductor and a fine-wire secondary, which fits board-level current transformers, instrument sensing, and low-power auxiliary or gate-drive transformers.
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