Test and Measurement companies, especially the Electronic Test Equipment segment, prefer to utilize power supplies that are off-the shelf, or have minimal customization. In addition, EMI/EMC performance is critical to designers of such equipment as radiated and conducted noise can become a design hindrance for many types of test equipment. High reliability in the form of high MTBF is also critical, and most test equipment is in the field for many years. Having the highest convection ratings and power density allow equipment designers to make the products smaller, saving cost as cooling fans are not needed, and increasing marketability of the end products.