The Fair-Rite 7878400221 is a high-quality Toroid Core, available at Supreme Components International, an authorised distributor. This ferrite core is designed for use in a wide range of applications, including inductors, transformers, and chokes. Its compact size (OD: 7.87mm, ID: 4.75mm, H: 3.18mm) makes it suitable for space-constrained designs. The core is manufactured from Fair-Rite's Material 78, known for its excellent permeability and low core loss at higher frequencies. This ensures efficient energy transfer and minimal heat generation. Choosing this toroid core will enhance the performance and reliability of your electronic circuits. Supreme Components International guarantees the authenticity and quality of this Fair-Rite product.