What does color of magnetic ring mean?

Sustin Magnetic Ring

Features of Sendust magnetic ring: lower loss than iron powder core, good DC bias current characteristics, cost between iron powder core and iron nickel molybdenum, material permeability (μ): 26, 60, 75, 90 , 125. Standard color is black.

Iron core

In iron powder core materials, different coating colors are commonly used to distinguish between different materials. The international unified color standards are as follows:

2 materials: red body, transparent (natural color FERRITE) bottom surface ---- this material has low magnetic permeability, which can reduce AC during operation than other materials without losing flux density in gap. .

8 materials: yellow case, red bottom surface --- this material has low core loss and good linearity under high bias current conditions. It is a good high frequency material and most expensive material.

Material 18: light green body, red bottom surface --- this material is same as material 8, with low core loss, but high permeability and low cost, with good performance DC saturation.

26 materials: yellow body, white bottom --- most popular material, economic general purpose material suitable for a wide range of applications such as power conversion and line filtering.

28 materials: gray body, green bottom --- good linearity, low cost and relatively low magnetic permeability, widely used in large size high power UPS chokes.

Material 33: is an inexpensive material that can replace material 8. It is suitable for case where core loss is not important at high frequency, and linearity is good at high bias current. .

Material 40: green body, yellow underside --- cheapest material, its characteristics are very similar to material 26, and it is usually used in large sizes.

Material 52: light green case, blue bottom surface --- this material has relatively low core loss at high frequencies, and magnetic permeability is same as material -26. widely used in chokes.

The following is a short list of magnetic permeability, tolerances, temperature coefficient of magnetic permeability and standard colors of other magnetic materials.