Here is a list of 7 Coils categories. It encompasses a wide range including power inductors, edgewise coils, inductors (coil), lead inductors, etc. You can search for an overview, principle, and usage of each category, as well as find manufacturers and distributors.
*This ranking is solely among the companies registered with Metoree, sorted by the number of employees. Please use this as a rough guide to understand their scale.