The Fair-Rite 8978202021 is a high-quality Toroid Core, designed for optimal performance in a range of electronic circuits. Supreme Components International is an authorised distributor of Fair-Rite, ensuring you receive genuine components. This ferrite core is made from Material 78, known for its specific magnetic properties. The core's dimensions are A = 10.2 mm, B = 5.8 mm, and H = 3.5 mm. Toroid cores are commonly used in inductors, transformers, and chokes due to their efficient magnetic flux containment. This component falls under the FERRITE CORE category and TOROID CORE subcategory, making it suitable for applications requiring effective electromagnetic interference (EMI) suppression and energy storage.