COSEL Co., Ltd.

A wide range of electronic components, including semiconductors, are used in industrial and consumer electronic products. Semiconductor devices such as ICs, FETs, transistors, and diodes operate based on a stable DC power supply. In other words, converting the AC power supplied to factories and households into a stable DC current is essential. COSEL’s DC-stabilized power units make this possible.

Among our core products is the switching power supply, which utilizes the high-speed switching capabilities of semiconductors. These power supplies are compact, lightweight, and highly efficient, making them widely used in electronic devices across various fields, including information and communication systems, medical equipment, and factory automation. Since 2005, we have also been developing and selling EMI filters that protect electronic devices from various types of interference.

Today, nearly all products in our daily lives rely on electronic technology. As such, DC-stabilized power units play a crucial role in shaping the future. At COSEL, we are continuously exploring new technologies to ensure high reliability in our future products.