The "Neo" magnets are a first choice for many applications as they offer the greatest performance with the smallest volume. Neodymium Iron Boron, NdFeB, magnets exist in a variety of grades. These grades not only vary in magnetic output performance but they also vary with temperature rating. The maximum recommended temperature of operation for the “Neo” magnets is +200 to +230 degrees C although the exact limit is actually dependent on the magnet shape and the total magnetic circuit (so the recommended limits are really only crude guideline values). This is discussed in the section called Temperature Ratings.

All the Neodymium Iron Boron, NdFeB, magnets are prone to corrosion (a method similar to rusting). All Neodymium Iron Boron, NdFeB, magnets will require a form of protective coating. The standard coating is a triple layer plating of Nickel-Copper-Nickel (Ni-Cu-Ni). Unless requested otherwise, this Ni-Cu-Ni coating is always applied to the magnets. It should be noted that the level of protection given by any coating depends on the environment the magnet will be subjected to and how the coating is looked after.