While I was looking for a good telecom rectifier, I found the Staticon product. It has a design life of 30 years and is CSA certified! Though I was not good enough to select a quality thing, the Staticon people helped me to select the product which will meet my requirements. And it is working pretty well! I am so happy with Staticon and the staffs out there because I am so pleased with how they treat customers! I would recommend them to all those who require industrial power supply products.