250-W Power Supply is Convection-Cooled

June 12, 2013. TDK Corp. has announced the release of TDK-Lambda’s new CUS250LD series low-profile AC/DC power supplies. These single-output supplies provide 250 W 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 suitable for applications in light industrial, LED signage, communications, broadcast, gaming, point-of-sale, IT, and test and measurement equipment.

The supplies operate from a universal input of 85 to 264 VAC, 47 to 63 Hz, with PFC, enabling them to be used anywhere in the world. Moreover, they can operate from a 120- to 370-VDC input. These units have an input- to-output withstand voltage of 3kVAC. The CUS250LD series are available with an output voltage of 3.3, 4.2, 5, 12, or 24 VDC, 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 and EN50178, and the units are CE Marked. The supplies meet the conducted and radiated EMI requirements of EN55022-B and FCC Class B and include a 3-year warranty.



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