Tape wound cores and bobbin cores

28 February 2001 Passive Components

Magnetics offers tape wound cores made from high permeability magnetic strip alloys (0,0127 to 0,356 mm thick) of nickel-iron (80% or 50% Ni), silicon-iron, cobalt-iron and amorphous metals. Respective trade names are Permalloy 80, Orthonol, Magnesil and Supermendur. These cores have one or more desirable characteristics: high permeability, low core losses, high squareness B-H loops, high flux densities and square or round B-H loops, says the manufacturer.

Protective cases include phenolic, nylon, aluminum, and epoxy coated (sealed) aluminium boxes. Silicon-iron cores may be supplied unboxed or epoxy encapsulated. Tape cores are produced as small as 9,5 mm in ID, to more than 508 mm in OD, in over 1000 sizes.

Bobbin cores are miniature tape cores made from ultra-thin (3,18 mm to 25,4 mm thick) nickel-iron strip (80% Ni or 50% Ni) wound on nonmagnetic stainless steel bobbins. Covered with protective caps and epoxy coated, bobbin cores are made as small as 1,27 mm in ID and widths of 0,813 mm.

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