The Fair-Rite 7898400421 is a high-quality Toroid Core, a crucial component in numerous electronic circuits. Supreme Components International, an authorised distributor of Fair-Rite products, provides this core with guaranteed authenticity and performance. Constructed from Material 40, this toroid core offers excellent magnetic properties. Its dimensions are A = 12.7 mm, B = 7.3 mm, and H = 4.75 mm. Toroid cores are known for their closed-loop design, minimizing flux leakage and maximizing inductance. This makes them suitable for applications such as inductors, transformers, and chokes. Choose Fair-Rite for reliable performance and Supreme Components International for trusted distribution.