The 2643000101 is a Toroid Core from FAIR-RITE, a leading manufacturer of ferrite components. Supreme Components International is an authorised distributor, ensuring you receive genuine, high-quality parts. This specific core is made from 43 material, known for its versatile performance in a wide range of frequencies. The uncoated surface allows for direct winding and customization. Toroid cores are widely used in inductors, transformers, and chokes due to their closed magnetic path, which minimizes electromagnetic interference (EMI) and maximizes inductance. This core offers excellent magnetic properties, high efficiency, and compact size, making it suitable for various electronic applications. Trust Supreme Components International for all your FAIR-RITE component needs.