KATKO Oy is The Switch Manufacturer with more than 60 years of experience in designing, manufacturing and marketing of Load Break and Fuse Switches. KATKO was established in 1941, it is a family owned company with an inte......KATKO Oy is The Switch Manufacturer with more than 60 years of experience in designing, manufacturing and marketing of Load Break and Fuse Switches. KATKO was established in 1941, it is a family owned company with an international sales more than 60% over 40 countries around the world.