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Cosel Co., Ltd. – Excellence in Power Supply Solutions


Founded in 1969 and headquartered in Toyama, Japan, Cosel Co., Ltd. has established itself as a leading global designer and manufacturer of high-performance AC-DC power supplies, DC-DC converters, and EMI filters. With a steadfast commitment to quality, reliability, and flexibility, Cosel delivers innovative power solutions tailored to meet the evolving demands of various industries.


Global Presence:

Cosel operates as a $200 million enterprise, employing approximately 572 professionals across sales offices in Japan, Asia, Europe, and North America. This extensive global network enables the company to effectively serve a diverse clientele and provide localized support.


Industry Applications:

Cosel's products are engineered for demanding applications across multiple sectors, including:

  • Industrial Automation
  • Medical Equipment
  • Telecommunications
  • Lighting Systems
  • Audio/Broadcast
  • Renewable Energy


By maintaining a flexible approach and leveraging in-house design capabilities, Cosel integrates the latest technologies to address the specific requirements of each industry.


Product Portfolio:

  • AC-DC Power Supplies: Ranging from 3W to 10kW, available in board-level, open-frame, DIN rail, modular, and enclosed configurations.
  • DC-DC Converters: Offering outputs from 1.5W to 700W in board-level and DIN rail mount designs.
  • EMI Filters: Providing solutions to ensure compliance with electromagnetic compatibility standards.


Commitment to Quality:

Cosel's dedication to excellence is evident in its impressive defect rate of just 30 parts per million (PPM), underscoring the durability and reliability of its power supplies. The company offers a minimum two-year warranty on all products, reflecting confidence in their longevity and performance.


Customer-Centric Approach:

Understanding the diverse needs of its customers, Cosel imposes no minimum order quantities, facilitating flexibility for projects of varying scales. The company's in-house design and manufacturing capabilities enable the delivery of customized solutions that align with specific application requirements.

With over five decades of experience, Cosel continues to lead the power supply industry by upholding its core values of quality, reliability, and flexibility, ensuring that its products not only meet but exceed the expectations of its global clientele.

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