1U Convection-Cooled AC-DCs Achieve 400 Watts without Fans

XP Power plc today announced the SDH400 series of single- and dual-output 400-Watt convection cooled power supplies. These compact 1U profile chassis mount supplies, measuring 8.0 x 5.0 x 1.6 inches (203.0 x 127.0 x 40.64 mm) can deliver their full rated output without the need for any cooling fans or forced air flow. The single-output models also have a peak power capability that allows them to deliver 700 Watts for up to 0.5 seconds. This feature accommodates applications that have momentary high start-up currents such as that of a motor, but removes the need for a higher rated, larger and more costly power supply being specified. Efficiency is typically 88% for single-output models and 85% for duals.

The SDH400 single-output range comprises nine models providing all the popular nominal output voltages from +3 to +60 Vdc. Three dual-output models are also available that offer output combinations of +5/+12 Vdc, +5/+24 Vdc or +12/+24 Vdc. A trim function allows the user adjustment of output voltage in the range ±5% of stated nominal to make up for load losses or to cater for non-standard voltage requirements. Power OK signal, remote on/off control, short circuit and overvoltage protection features are included as standard.

The full convection rating is available from 90-264 Vac input and the series operates over a wide temperature range of 0 to + 70 degrees C with no derating until +50 degrees C, meaning the SDH400 series will suit most global industrial power requirements without the need for de-rating.

The series meets safety approvals standard UL/EN 60950-1 and also conforms with EN55022 class B standard for conducted and radiated emissions. Optional Molex input and output connectors are available in place of the standard screw terminal blocks. The SDH400 series is priced at $319.18 for 500 pcs orders