Frequency Control, Crystal, Oscillator, and Power Inductor Component Manufacturer - ECS Inc. International ECS Inc. International is a privately held Global Leader in its class that is at the forefront of servicing a growing global demand for highly reliable and innovative passive components, components meeting the needs of the world today and beyond. ECS Inc. is recognized by world class research firms and electronic device designers as a top 25 worldwide developer and manufacturer of innovative frequency control, synchronization, connectivity and magnetic power solutions.