 14.06.2013 TDK Corporation announced the CUS250LD series low profile AC-DC power supplies. These single-output supplies provide 250-watts of output power with convection cooling (no fans required). This design eliminates the need for fan maintenance and reduces acoustic noise and vibrations.
At this level of power, plus meeting all the ITE and safety certifications, it's a well designed supply that doesn't need forced air cooling. Mere convection cooling does the job---that's pretty impressive and efficient.
The supplies have a low profile of 1.18” and a footprint of 4.0” x 7.8”, in applications such as light industrial, LED signage, communications, broadcast, gaming, point-of-sale, IT, and test & measurement equipment.
The supplies operate from a universal worldwide input of 85-264Vac, 47-63Hz, with PFC. They are also capable of operating from a 120-370Vdc input. These units have an input- to-output withstand voltage of 3kVac. The series is 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 series features global ITE and general purpose safety agency certifications per UL/CSA/EN60950-1, EN50178, and are CE Marked. They meet the conducted and radiated EMI requirements of EN55022-B & FCC Class B. | 
