The 5977001021 is a high-quality Toroid Core manufactured by Fair-Rite. Supreme Components International is an authorised distributor of Fair-Rite components, ensuring you receive genuine products. This core is made from Fair-Rite's 77 material, specifically designed for effective EMI suppression. Toroid cores are known for their closed-loop magnetic path, which minimizes flux leakage and maximizes inductance. This makes them ideal for applications where minimizing electromagnetic interference is crucial. The 5977001021 is suitable for use in a wide range of electronic devices, including power supplies, filters, and chokes. Its robust construction and reliable performance make it a valuable component for any electronic design requiring EMI mitigation. Trust Supreme Components International for your Fair-Rite component needs.