The 5977001421 is a high-quality Toroid Core manufactured by Fair-Rite, a leading name in ferrite technology. This core is made from Fair-Rite's popular 77 material, known for its versatile performance characteristics. As an authorised distributor, Supreme Components International ensures you receive a genuine Fair-Rite product. Toroid cores are widely used in inductors, transformers, and other electromagnetic devices due to their efficient magnetic flux containment. The 5977001421 offers excellent performance in a compact form factor. Consider this reliable component for your next design requiring a dependable ferrite core. Supreme Components International is your trusted source for authentic electronic components.