Nanocrystalline toroidal core 40×26×15 mm
40×26×15 mm nanocrystalline toroidal core, Blue colored Powder Coating.
CCNT-040-026-015-LFBL is a 40×26×15 mm nanocrystalline toroidal core with Blue powder coating. Bare size is 40×26×15 mm. Finished (coated) size is 40.8×25.7×15.5 mm.
Former part number: CCNT-040-025-015-LFBL
In stock
$12.60Pack of 5
$2.52 per piece
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Volume pricing
Online packs are $10.00 minimum. Buy packs totaling under 50 pieces. 50+ is quoted.
| Pack / qty | Unit price | How to buy |
|---|---|---|
| Pack of 5 | $2.52 | Buy online |
| Pack of 10 | $2.02 | Buy online |
| 50+ pieces | Quoted | Request quote |
Technical 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
- current transformers
- ground-fault sensing
- prototype magnetics
DIY & R&D usage
- DIY current-sensing builds
- benchtop transformer prototyping
- hobbyist magnetics experiments
Technical applications
- current transformers (powder-coated LF toroid)
- ground-fault sensing (powder-coated LF toroid)
- prototype magnetics (powder-coated LF toroid)
When to choose this size
Choose CCNT-040-026-015-LFBL when you need this 40×26×15 mm powder-coated toroid. Use the bare dimensions for the magnetic path and the finished inner diameter (25.7 mm) for winding clearance.
Winding notes
Magnetic calculations should use the bare 40×26×15 mm geometry (Ae 0.86 cm², Le 10.37 cm, stacking factor 0.82). AL is one turn through the window (Kelvin clips) at 0.3 V: 18 µH at 1 kHz, 15.5 µH at 10 kHz, and 4 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 25.7 mm, not the 26 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 (40×26×15 mm). Finished coated size is 40.8×25.7×15.5 mm.
How was AL measured?
One turn: Kelvin clips through the window at 0.3 V. AL is 18 µH at 1 kHz, 15.5 µH at 10 kHz, and 4 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 40×26×15 mm powder-coated toroid is used for current transformers and ground-fault sensing. The 25.7 mm finished window clears a modest cable or a multi-turn primary, and the 15 mm height adds magnetic area for protective-relay current transformers and medium-frequency transformers.
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