The Pioneer of Industry-Standard
Power Supplies and EMI Filters
Switching Power Supplies（）
EMI Filters
About COSEL
Since its establishment in 1969, COSEL has always been at the cutting edge of power conversion technology Today, COSEL continues to grow and make a difference in society by supplying high-quality, reliable products and services.
COSEL connects electricity
Products
We provide various products with safety certifications required for applications such as factory automation, medical settings, and communications.
Corporate Information
A global company providing switching power supplies and EMI filters, products and services that support industrial equipment.
Investor Relations
We work to achieve growth and enhance corporate value together with our shareholders and investors.
Sustainability
We actively promote a sustainable society through collaboration with our stakeholders
