9643001015 by Fair-Rite is a ferrite cores & accessories designed for reliable performance in electronic applications. It is widely used in industrial, automotive, and power management systems.

The magnetic component product category includes products used for assembling custom or prototype magnetic components, such as polyurethane- or polyamide-insulated copper wire (magnet wire), gapped and ungapped ferrite cores, and coil formers (bobbins) around which such wire can be wound and subsequently assembled with a core to produce a transformer or inductor with user-controlled characteristics.