Size marking on the case is the bare core dimension (OD × ID × H), not the cased or finished size.
Nanocrystalline toroidal core 86×77×10 mm
86×77×10 mm nanocrystalline toroidal core, Black PBT Class B 130C.
CCNT-086-077-010-STBK is a 86×77×10 mm nanocrystalline toroidal core with Black PBT Class B 130C.
In stock
$20.341 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 |
|---|---|---|
| 1 piece | $20.34 | Buy online |
| Pack of 3 | $19.32 | Buy online |
| Pack of 5 | $18.31 | Buy online |
| Pack of 10 | $16.27 | Buy online |
| 50+ pieces | Quoted | Request quote |
Technical Specifications
Bare core dimensions
Cased / finished dimensions
Magnetic properties
Finish and handling
Environmental
Product photos
Applications and selection
Recommended usage
- current transformers
- ground-fault sensing
- EMI chokes
DIY & R&D usage
- DIY current-transformer winding
- benchtop leakage-current experiments
Technical applications
- protection and metering current transformers
- residual-current sensing
- common-mode chokes
When to choose this size
Choose CCNT-086-077-010-STBK when you need this 86×77×10 mm toroidal core. Use the bare dimensions for the magnetic path and the finished dimensions, when published, for winding clearance.
Winding notes
Magnetic calculations should use the bare 86×77×10 mm geometry. AL, Ae, and Le were not measured for this core. Saturation is 1.25 T.
Related application guides
Frequently asked questions
Are the stated dimensions bare or finished?
The size in the product name is the bare core. Finished dimensions are listed separately when they were measured.
Where is a core this size used?
This 86×77×10 mm cased toroid is a large-window, short core for current transformers, residual-current sensing, and common-mode chokes. The 74 mm finished window lets a heavy cable pass as a single-turn primary, which is the usual layout for protection and metering current transformers and ground-fault sensors.
What finish is on this core?
This core is finished with Black PBT Class B 130C.
Need this core for your application?
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