Powering Your Success with Uncompromising Quality — The Cosel Promise
At Cosel, we’re committed to delivering high-performance power supplies that meet the most rigorous Japanese standards. Here’s how we ensure your satisfaction at every step:

Exceptional Reliability Through Advanced Testing

We work hand-in-hand with component manufacturers to engineer power supplies built for longevity. Our proprietary evaluation methods — including the demanding “Oil Bath Test” — guarantee that only top-tier industrial-grade components make it into our products.

Confidence Backed by Long-Term Warranties

Certified under ISO 9001 and ISO 14001, our power supplies are renowned for their durability, energy efficiency, and environmental responsibility. We back our quality with industry-leading warranties of 5 to 10 years — because we believe in what we build.

On-Site Technical Expertise

Our experienced engineers are ready to visit your facility, offering hands-on support to swiftly resolve technical challenges and minimize operational disruptions.

Root Cause Analysis & Reliable Resolution

Should an issue arise, we don’t just fix it — we investigate it. Our thorough failure analysis identifies the root cause, enabling us to implement effective, lasting solutions that keep your systems running smoothly.