The Fair-Rite 2944778101 is a Toroid Core designed for optimal performance in inductor and transformer circuits. Supreme Components International, an authorised distributor of Fair-Rite components, provides this core crafted from Material 77, known for its excellent magnetic properties. With an inductance factor (A) of 11.2nH/N^2, this core allows for precise inductance control. Its small size (Outer Diameter: 4.7mm, Inner Diameter: 2.4mm, Height: 1.9mm) makes it perfect for applications where space is a premium. This toroid core is widely used in power supplies, filters, and other electronic circuits requiring efficient energy storage and transfer. Trust Fair-Rite quality and Supreme Components International's reliable distribution for your component needs.