Ferrite Ring Core 27x11x6.7mm
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Prices updated: 12 Oct 2026
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About this product
A ring-shaped ferrite core with an outer diameter of 27 mm, an inner diameter of 11 mm and a height of 6.7 mm. Ferrite rings are used to build chokes and common-mode filters that reduce electromagnetic interference, and wire can be wound through the centre hole to make custom inductors or transformers.
Specifications
- Shape
- Ring (toroid)
- Outer diameter
- 27 mm
- Inner diameter
- 11 mm
- Height
- 6.7 mm
Frequently asked questions
How do I use it as an EMI filter on a cable?
Pass the cable conductors through the centre hole together, such as both supply wires or both signal lines. Several turns increase attenuation at lower frequencies, while a single pass is common for simple suppression.
What inductance will I get from this core?
The listing does not state the ferrite material or the inductance factor (AL). Check the supplier's datasheet before winding a precise inductor, because the value depends on the material and the number of turns.
