The Fair-Rite 431173951 is a Ferrite Toroid Core designed for a wide range of electronic applications. Supreme Components International is an authorised distributor of Fair-Rite components, ensuring you receive a genuine, high-quality product. This core is made from Material 73, known for its excellent performance characteristics. Its toroidal shape provides a closed magnetic path, minimizing flux leakage and maximizing inductance. The core's dimensions are 11.7mm outer diameter, 7.3mm inner diameter, and 5.1mm height. This compact size makes it suitable for space-constrained designs. Typical applications include inductors, transformers, and filters. Choose this Fair-Rite toroid core for reliable and efficient performance in your electronic circuits.