Convection-Cooling Eliminates Fan Maintenance and Audible Noise in 250W Power Supplies

TDK Corporation has announced the release of TDK-Lambda's new CUS250LD series low profile ac-dc power supplies. These single-output supplies provide 250W of output power with convection cooling (no fans required). This design eliminates the need for fan maintenance and reduces acoustic noise and vibrations. In addition, they feature a low profile of only 1.18” and a compact footprint of 4.0” x 7.8”, making them suited for applications in light industrial, LED signage, communications, broadcast, gaming, point-of-sale, IT, and test & measurement equipment.

The supplies operate from a universal input of 85-264Vac, 47-63Hz, with PFC, enabling them to be used anywhere in the world. Moreover, they can operate from a 120-370Vdc input. These units have an input- to-output withstand voltage of 3kVac. The CUS250LD series are available with an output voltage of 3.3V, 4.2V, 5V, 12V, or 24Vdc, all of which have a +/-10% user-adjustment range.

The convection-cooled operating temperature range is from -25°C to +70°C with derating above +40°C. The power-saving efficiency is up to 90%. Other standard features include overvoltage and overcurrent protections plus a green LED indicator that is lit when the supply is on.

The CUS250LD series feature global ITE and general purpose safety agency certifications per UL/CSA/EN60950-1, EN50178, and are CE Marked. The supplies meet the conducted and radiated EMI requirements of EN55022-B & FCC Class B and include a three-year warranty.