COSEL Company Profile

We deliver high-quality, ultra-compact switching power supplies (DC stabilized power supplies), DC-DC converters, and noise filters.

Kohsel is a manufacturer of "DC stabilized power supplies" and "noise filters." The "switching power supply," which utilizes the high-speed switching action of semiconductors, is Kohsel's main product. Due to its compact size, lightweight, and high efficiency, switching power supplies are used in almost all electronic devices, including information and communication equipment, medical devices, and factory automation equipment. Additionally, since 2005, Kohsel has been working on noise filters that protect electronic devices from various types of noise and has brought them to market. In today's world, where most products surrounding society and daily life have become electronic, the DC stabilized power supply, which can be considered the heart of such products, holds the key to the future. At Kohsel, we continue to create reliable products that build the future of electronics through endless dialogue with new technologies.